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EVE MB31 314Ah cells configured as 4S, 8S and 16S LiFePO4 battery packs
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Ultimate DIY LiFePO4 Battery Build Guide: 12V, 24V and 48V
The complete planning, assembly and commissioning guide

Build a 12.8V, 25.6V or 51.2V LiFePO4 battery with EVE MB31 314Ah cells

This guide shows how to choose the right pack voltage, match the BMS, inspect and restrain the cells, verify every connection and commission the finished battery without using the BMS as the normal operating control.

View EVE MB31 cells
View the JK DIY cabinet

Sixteen EVE MB31 cells make a 51.2V, 314Ah battery storing just over 16kWh. Eight make an 8kWh 24V-class pack, while four make a 4kWh 12V-class pack. The cells are the same, but the current, BMS, copper, protection and sensible inverter size are very different.

Read this before touching a busbar

A large LiFePO4 pack can deliver destructive fault current even when its nominal voltage is below 60V. Cell terminals remain live. A BMS, open switch or removed fuse does not make the cell string electrically dead.

This article is educational and does not replace the EVE, JK, inverter, fuse, enclosure or installation instructions. In Queensland, the Electrical Safety Office says a licensed electrician should install a battery energy storage system, including a custom-made battery bank. Fixed wiring, inverter connection, grid connection, switchboard work and final BESS commissioning belong with appropriately licensed people. A DIY battery may also be unsuitable for a grid-connected installation, approved-product requirement, rebate, warranty or insurer.

What this guide covers

  1. Choosing 12V, 24V or 48V
  2. Why use EVE MB31 cells?
  3. Choosing the correct JK BMS
  4. Parts and tools
  5. Incoming cell inspection
  6. Top-balancing decisions
  7. Mechanical assembly
  8. BMS sense-lead verification
  9. Fuse, isolation and pre-charge
  10. Conservative JK settings
  11. Deye, Victron and Growatt
  12. First power-up and commissioning
  13. Parallel battery packs
  14. Maintenance and documentation

1. Choose voltage from current, not habit

The correct place to start is the largest continuous inverter load, expected surge, lowest normal battery voltage, inverter efficiency and allowable voltage drop. Do not start with “I have always used 12V.”

The approximate battery current is:

DC current = AC load watts / (battery voltage x inverter efficiency)

At 92% inverter efficiency, a 5kW load requires approximately 425A from a 12.8V pack, 212A from a 25.6V pack and 106A from a 51.2V pack. Actual current rises as battery voltage falls, and surge, inverter self-consumption and conductor losses add more.

Comparison of current required for a 5kW inverter load at 12.8V, 25.6V and 51.2V
The same inverter load becomes much easier to manage as system voltage rises.
4S

12.8V / 4.02kWh

Best for modest RV, marine and small off-grid loads. A single MB31 string is not a sensible route to a continuous 3-5kW inverter.

8S

25.6V / 8.04kWh

A practical middle ground for medium off-grid systems and roughly 2-3kW inverter loads when the complete current design supports it.

16S

51.2V / 16.08kWh

The hero build for home storage and modern inverter systems. It naturally suits a 5kW-class Deye, Victron or Growatt installation.

EVE MB31 314Ah cells configured as 4S, 8S and 16S LiFePO4 battery packs
Nominal energy is nominal voltage multiplied by 314Ah. The enclosure, BMS, protection and copper add substantial weight.
Important cell limit: the reviewed MB31 specification lists 0.5P maximum continuous charge and discharge power at 25°C. For a 314Ah, 3.2V cell, this corresponds to about 157A and 502W per cell under those conditions. A 200A BMS does not upgrade the cell, cable, terminal, busbar or fuse.

2. Why the EVE MB31 314Ah?

The MB31 is a strong all-round energy-storage cell. EVE lists 314Ah nominal capacity, 3.2V nominal voltage, 1004.8Wh nominal energy, approximately 5.6kg weight and 0.5P/0.5P standard charge/discharge capability.

Its greatest DIY advantage is not only capacity. The 280-314Ah prismatic-cell format has a mature ecosystem of enclosures, busbars, insulation, restraint systems and BMS hardware. That makes a 16-cell, 16kWh pack easier to support than many newer oversized cell formats.

For a broader comparison, read our EVE MB31 vs LF334 vs REPT 345Ah decision guide.

3. Match the BMS to the actual pack

The BMS must match the chemistry, series count, normal current, surge behaviour, temperature requirements and inverter communication method.

PackJK selectionImportant limitation
4S / 12.8VA genuine 4S-capable JK modelThe reviewed JK PB1/PB2 16S family does not cover 4S. See our JK 4-8S first-start guide.
8S / 25.6VA correctly rated 8S JK, or a compatible PB model after firmware/protocol verificationThe reviewed PB manual covers 7-16S electrically, but inverter communication at 24V still needs confirmation for the exact hardware.
16S / 51.2VJK PB inverter BMS matched to the required currentConfirm hardware revision, firmware, CAN/RS485 protocol and pinout for the actual inverter.

Never choose a BMS only because its headline current rating matches the inverter. A 200A BMS can still be the wrong choice if the cell, terminal, conductor, busbar, enclosure or fuse cannot safely support the intended current.

4. Parts and tools

Cells, BMS and monitoring

  • 4, 8 or 16 traceable EVE MB31 314Ah cells
  • JK BMS matched to the exact series count, current and communication requirement
  • All specified cell and BMS/MOS temperature sensors
  • Compatible JK display/interface board where required
  • Verified CAN or RS485 cable built from the exact two product pinouts

Mechanical assembly and insulation

  • Rigid enclosure with service access and protected conductor entries
  • Engineered restraint with flat end plates
  • Cell-to-cell insulation and a non-conductive base
  • Terminal and busbar covers
  • Strain relief, abrasion protection and secure BMS mounting

The reviewed EVE specification lists a recommended cell compression force of 3000-7000N and an instantaneous maximum of 10000N. This is force across the cell face, not threaded-rod torque. Do not invent a bolt torque without an engineered clamp geometry and measurement method.

Power path and tools

  • Busbars and terminal hardware suited to the actual cell variant
  • DC-rated fuse with suitable voltage rating, interrupt rating and time-current behaviour
  • Load-rated DC disconnect where required by the design
  • Conductors, lugs and supports sized for the installation method
  • Pre-charge resistor and switching method designed for the inverter input capacitance
  • CAT-rated multimeter, insulated probes and insulated tools
  • Calibrated torque wrench or screwdriver
  • Proper lug crimper and cable cutter
  • Thermal camera for staged-load commissioning

EVE specifies a maximum pole torque of 6N·m in the reviewed MB31 datasheet. Confirm that value against the actual terminal variant, adapters and fasteners supplied. Use a calibrated tool and record the final result.

5. Inspect the cells before assembly

Do not assemble first and discover a problem later. Record the supplier, batch/QR information, physical condition, resting voltage and consistently measured internal resistance for every cell. Capacity-test if that is part of the acceptance plan.

Quarantine any cell with a dent, swelling, leak, corroded or damaged terminal, abnormal voltage or unexplained measurement outlier. A severely over-discharged cell should not be “recovered” as part of a public tutorial.

6. Top balancing: choose a controlled method

Top balancing is a commissioning process, not a ritual that must be repeated routinely. Two defensible approaches are common:

  1. Parallel top balance before assembly: bring the cells to the same upper state of charge with a current-limited bench supply, verified polarity, temperature monitoring and continuous supervision.
  2. Assemble and commission slowly: construct the series pack, verify every sense connection, charge at low controlled current and allow the active balancer to correct the upper-curve spread.

Do not use a “set the supply and walk away” method. The process needs current limiting, supervision, a clear termination criterion and respect for EVE’s 3.65V absolute charge limit. For a dedicated walkthrough, see How to Top Balance LiFePO4.

7. Mechanical assembly

  1. Prepare a clean, dry, non-conductive bench and remove jewellery.
  2. Confirm cell orientation against a printed series map.
  3. Install cell-to-cell insulation before fitting busbars.
  4. Place cells into the restraint system without lifting from the terminals.
  5. Apply controlled, even restraint within the manufacturer’s force limits.
  6. Install one busbar at a time while neighbouring terminals stay covered.
  7. Use only an approved method to prepare mating surfaces.
  8. Tighten with the correct sequence and calibrated torque tool.
  9. Apply a torque mark and replace the terminal cover immediately.
  10. Compare measured total series voltage with the sum of the individual cells.

Never rest the BMS, tools, fasteners or loose busbars on exposed cells.

8. Verify every BMS sense lead before connection

A misplaced balance lead can damage the BMS or create a short through the harness. Wire colour alone is not proof.

  1. Leave the BMS sense connector unplugged.
  2. Attach the harness to the cell string in the exact order shown in the manual.
  3. Measure each adjacent step at the unplugged connector: B0-B1, B1-B2 and onward should each show one cell voltage with correct polarity.
  4. Measure cumulatively from B0 to every successive pin. Voltage should rise by one cell at each step.
  5. Stop if any step is negative, zero or close to two cell voltages.
  6. Verify B-, P-, display, communication and temperature connections.
  7. Only insert the sense connector after an independent recheck.

9. The BMS is not the fuse

Conceptual LiFePO4 battery system showing cell string, BMS, fuse, disconnect, pre-charge and inverter
The inverter, BMS and fuse perform different jobs and must be coordinated with the rest of the design.

In a common-port MOSFET arrangement, cell-string negative connects to BMS B-, and BMS P- connects to the negative DC bus. Cell-string positive goes through the engineered positive protection and isolation path to the DC bus. Follow the exact JK manual for the hardware being used.

The fuse protects against fault current. It requires an adequate DC voltage rating, interrupt capacity and time-current relationship with the conductors and equipment. A pre-charge circuit limits inverter-capacitor inrush before the main path is closed. Read our discussion of 48V battery circuit breakers and Class T fuses.

An RJ45 connector does not guarantee an Ethernet pinout. Verify both ends of every JK-to-inverter communication cable and continuity-test it before connection.

10. Conservative JK settings for an MB31 pack

The best settings make the inverter stop normal operation first, keep the BMS as the last-resort guardrail and leave the fuse to clear serious fault current.

FunctionStarting valuePurpose
ChemistryLiFePO4Select before entering other values.
Cell count4, 8 or 16 as physically builtVerify from the harness and cumulative voltage.
Capacity314Ah or measured usable capacityEstablishes the coulomb-counter baseline.
Balance startAbout 3.40V/cellBalances on the upper curve rather than chasing mid-curve load sag.
Balance delta10-15mVAvoids hunting over tiny dynamic differences.
Controlled charge ceiling3.55V/cellLeaves margin below EVE’s 3.65V maximum.
Cell OVPAbout 3.60VLast-resort high-cell protection.
OVP recoveryAbout 3.45VProvides useful hysteresis.
SOC 100%3.50V/cellSynchronises the fuel gauge; it is not the charge cutoff.
Float / maintenance3.40V/cell if requiredAvoids holding the pack at its charge ceiling.
Cell UVP2.80V/cellHard BMS cutoff. Do not design routine cycling to 2.5V.
UVP recoveryAbout 3.00-3.05V/cellCoordinate with restart behaviour.
Charge low-temperature stop0°CMatches the lower end of EVE’s listed charge range.
Charge low-temperature recovery3-5°CPrevents cycling at freezing point.
Emergency modeOFFIt overrides normal protections and is not an operating mode.

Pack-voltage equivalents

PackCharge at 3.55V/cell100% sync at 3.50V/cellFloat at 3.40V/cellBMS UVP at 2.80V/cell
4S14.2V14.0V13.6V11.2V
8S28.4V28.0V27.2V22.4V
16S56.8V56.0V54.4V44.8V
Normal low-voltage operation: set the inverter’s routine low-SOC or low-voltage stop above 2.80V/cell, allowing for voltage sag at the design load. The 2.80V JK value is a hard last-resort cutoff, not the normal end of every cycle.

Do not simply enter the BMS’s maximum current as the charge/discharge limit. The operational current must respect the MB31 continuous limit, conductor and busbar ampacity, terminal temperature, fuse coordination and inverter behaviour. Over-current delays, short-circuit delay and smart-sleep behaviour must be verified against the exact JK firmware.

LiFePO4 does not need lead-acid-style float charging. If an inverter requires a float field, 3.40V/cell is a conservative maintenance value for this project. See our separate LiFePO4 float-voltage guide.

11. Deye, Victron and Growatt SPF integration

Closed-loop CAN or RS485 communication can allow the BMS to report SOC, alarms, requested charge voltage, charge-current limit and discharge-current limit. It does not remove the need for safe fallback settings.

Deye / SunSynk

  • Record the full JK and Deye model, hardware revision and firmware.
  • Verify CAN versus RS485 and both connector pinouts.
  • Select the matching JK inverter protocol and lithium/BMS mode.
  • Confirm SOC, requested voltage, current limits and alarms on both devices.
  • Disconnect communication in a controlled test and prove the intended fallback/fault response.

Victron

A Victron system may use a GX device, DVCC and compatible CAN-bus integration, or it may run open-loop. Do not assume native support until the exact JK firmware/protocol and Victron architecture have been tested. Existing site references include connecting a JK inverter BMS to Victron and the Victron Multi RS 48/6000 JK CAN example.

Growatt SPF

Growatt SPF is a family, not one universal protocol. Confirm the full inverter model and firmware, CAN/RS485 requirement, battery protocol, pinout, lithium-menu selection and safe open-loop fallback values.

12. First power-up and commissioning

Before energising

  • Cell model, quantity and polarity match the drawing.
  • No damaged or quarantined cell is installed.
  • Restraint and insulation are complete.
  • Every busbar and terminal is torqued, marked and covered.
  • Every adjacent and cumulative sense voltage is correct.
  • B-/P-, fuse, disconnect, conductor and pre-charge designs have been checked.
  • Temperature probes are installed at representative locations.
  • The inverter is isolated from AC, grid and PV as required by its shutdown procedure.

Controlled commissioning sequence

  1. Wake the BMS without the inverter load and compare every cell reading with the multimeter.
  2. Check all temperature sensors and alarm states.
  3. Verify charge/discharge switching and the configured limits.
  4. Pre-charge the inverter using the designed method.
  5. Close the main DC path only after the voltage difference has fallen to the design criterion.
  6. Begin at low power and compare BMS, external meter and inverter readings.
  7. Increase load in planned steps while recording cell delta, voltage drop and temperatures.
  8. Thermally inspect terminals, busbars, BMS and conductors after a meaningful load soak.

Stop for a hot connection, rising cell temperature, swelling, abnormal smell or sound, unstable voltage, unexplained cell divergence or a mismatch between instruments. Do not deliberately short the pack or force cells beyond safe limits to “test” protections for a video.

13. Parallel packs need separate protection

Parallel packs are separate energy sources. Each pack needs a compatible BMS and normally its own branch fuse and isolation, connected to an engineered common bus.

  • Match chemistry, series count and operating voltage.
  • Bring pack voltages close before connection.
  • Use an engineered current-sharing/busbar arrangement.
  • Configure unique BMS addresses where required.
  • Confirm how total charge and discharge limits reach the inverter.
  • Prove that one isolated pack cannot overload the remaining pack.

Never connect packs at significantly different voltages and expect the BMS to control equalisation current.

14. A good battery finishes with documentation

A battery is not finished merely because it turns on. Keep a permanent pack record containing:

  • one-line diagram and cell-series map
  • cell and BMS datasheets
  • final settings and firmware versions
  • cell inspection, torque and thermal-test records
  • fuse, disconnect, conductor and pre-charge details
  • shutdown, restart and emergency procedures
  • SDS location, maintenance schedule and alarm meanings

Future checks should review enclosure condition, moisture or pests, event logs, cell-delta trends, terminal condition and temperature under a known load. Do not casually retorque live terminals.

The build philosophy in one minute

  1. Choose voltage from current and inverter power.
  2. Keep normal continuous current within the cell and complete-system limits.
  3. Inspect and document every cell before assembly.
  4. Restrain, insulate, torque and cover the pack correctly.
  5. Verify every balance lead with a meter before connecting the BMS.
  6. Make the inverter stop normal operation before the BMS guardrails.
  7. Use 3.55V/cell charge, 3.50V/cell SOC sync, 3.40V/cell float if required and 2.80V/cell only as the hard low-voltage cutoff.
  8. Commission in controlled stages and record the thermal result.

Technical references

For the Australian installation boundary, also read Safe Installation of LiFePO4 Batteries in Australia.

EVE MB31, EVE LF334 and REPT 345Ah LiFePO4 cells compared by capacity, power and storage use case
Lithium Battery-school Blog
LiFePO4 Australia
EVE MB31 vs EVE LF334 vs REPT 345Ah: Which LiFePO4 Cell Should You Choose?

LiFePO4 cell buyer’s guide · updated 2026

Choose the cell for the job—not the biggest Ah number.

EVE MB31, EVE LF334 and REPT 345Ah can all build an excellent battery. The right choice comes down to the balance between stored energy, current demand, pack voltage and how hard the battery will work.

See the quick answer Use the cell finder
EVE MB31, EVE LF334 and REPT 345Ah LiFePO4 cells compared by capacity, power and storage use case
3 good cells. Three different strengths.
314 AhEVE MB31 · balanced long-life ESS choice
334 AhEVE LF334 · higher-output option worth considering
345 AhREPT CB84 · maximum energy for gentler storage duty

The quick answer

Start with the way the battery will work.

Capacity matters, but the battery’s voltage, inverter size and expected current decide whether that capacity can be used comfortably.

1

EVE MB31

The safest all-round recommendation for home solar, off-grid and daily-cycling ESS builds with moderate current demand.

Choose it when: proven storage duty and a balanced design matter most.

2

EVE LF334

The cell to look at when the pack needs more current headroom. It is especially relevant for demanding 12V and 24V builds, mobile power and larger inverter loads.

Choose it when: output capability matters as much as stored energy.

3

REPT 345Ah

The most stored energy per cell in this comparison, well suited to large banks and longer-duration storage designed around a gentler discharge rate.

Choose it when: maximum capacity and value matter more than high current from one string.

Side-by-side comparison

Similar size class. Different design priorities.

Use this as a buying map, then confirm the exact continuous-current, pulse-current, compression and cycle-test conditions for the batch being supplied.

CellNominal energy per cellApprox. 16S energyBest fitMain caution
EVE MB31 314Ahabout 1.00 kWhabout 16.1 kWhLong-life ESS, home solar, off-grid and commercial storageNot the first choice for very high current from a small pack
EVE LF334 334Ahabout 1.07 kWhabout 17.1 kWhHigher-output 12V, 24V and 48V builds, RV, marine and mobile powerVerify continuous versus pulse ratings against the exact batch datasheet
REPT 345Ah CB84about 1.10 kWhabout 17.7 kWhLarge solar banks, long-duration backup and lower-rate ESSOne small string may not suit a large inverter running continuously
Quick recommendation cards for EVE MB31, EVE LF334 and REPT 345Ah LiFePO4 cells
MB31 is the balanced storage choice, LF334 adds power headroom, and REPT 345Ah maximises energy per cell.

Why Ah alone is misleading

A bigger fuel tank does not automatically mean a stronger engine.

Ah tells you how much charge a cell stores. It does not tell you how quickly the cell should deliver that charge, how much heat the pack will create, or whether the BMS, busbars and cabling can support the load.

Pack voltage changes everything

A 3000W inverter on 12V can draw well over 230A before losses. At 48V, the same power needs roughly one quarter of the current.

C-rate needs context

Standard, continuous and pulse ratings are not interchangeable. Use the exact supplied-cell datasheet when setting charge, discharge and BMS limits.

The whole pack carries the load

Cell rating is only one limit. BMS current, connections, busbars, cable size, compression, cooling and inverter surge behaviour all matter.

C-rate chart comparing EVE MB31, EVE LF334 and REPT 345Ah LiFePO4 cells
C-rate changes the practical battery choice. More Ah does not always mean more usable inverter power.

Why LF334 deserves a closer look

Current headroom can be worth more than a headline cycle number.

The LF334 is easy to overlook if you compare only ESS cycle claims or cost per Ah. Its real appeal is a more power-oriented role: high-load 12V systems, mobile and marine builds, and batteries expected to support larger inverters from a single string.

That does not make it automatically better than MB31. It makes it better suited to a different duty cycle. If a conservative ESS cell leaves too little margin at the current your build requires, LF334 is genuinely worth considering.

LF334 makes sense when…

the battery voltage is low, inverter load is high, surge performance matters, or you want more current headroom without adding parallel strings.

Keep the claim honest

A high pulse figure must not be presented as a continuous rating. Confirm the exact supplied batch and design the BMS and conductors around the verified limit.

16S nominal energy comparison for EVE MB31, EVE LF334 and REPT 345Ah LiFePO4 cells

Choose by system

12V, 24V and 48V can change the answer.

The same inverter power creates very different current at different battery voltages. That is why a power-oriented cell can be valuable in a compact 12V build, while a moderate-rate ESS cell becomes much more practical in a 48V pack.

12V

High current

Large inverters can demand hundreds of amps. LF334 deserves serious consideration, along with carefully sized BMS, busbars and cabling.

24V

Middle ground

Current is more manageable, but mobile and inverter-heavy systems can still benefit from added output headroom.

48V

Storage friendly

Lower current for the same power makes MB31 and REPT-style storage cells easier to use in appropriately sized banks.

Compare live products

Check the cells, stock and current pricing.

Product details below come directly from WooCommerce, so the links and current store information remain useful as the guide ages.

Before building: confirm the supplied batch datasheet and do not set charge or discharge limits from a general comparison article alone.

LiFePO4 cell finder

Choose by discharge time.

How quickly does the battery need to deliver its stored energy? Pick the closest duty class below: one hour for high power, two hours for balanced storage, or four-plus hours for a very large long-duration bank.

More power per cellMore runtime and capacity
1 hour
Around 1C duty
High current

Choose EVE LF334

For batteries that must deliver a lot of power from each cell string.

  • Large inverter loads
  • High-power 12V or 24V systems
  • Compact or single-string builds
View EVE LF334
2 hours
Around 0.5C duty
Balanced middle

Choose EVE MB31

For the many systems that sit between maximum power and maximum capacity.

  • General home and off-grid ESS
  • Moderate inverter demand
  • Balanced daily-cycling storage
View EVE MB31
4+ hours
Around 0.25C duty
Long-duration storage

Choose REPT 345Ah

For a very large battery designed around gentle current and maximum stored energy.

  • True off-grid living
  • Multi-day autonomy without sun
  • Large 48V or parallel-string banks
View REPT 345Ah

Important: “1 hour”, “2 hours” and “4 hours” describe the approximate discharge-rate class, not a promise that the battery stops after that time. A large REPT bank running lighter real-world loads can provide days of autonomy. Always confirm the exact supplied-cell datasheet and size the complete battery around inverter power, usable kWh, BMS, wiring and charging limits.

Still choosing between two cells?

Tell us the pack voltage, inverter size, target capacity and whether the battery is for mobile power, off-grid use or daily home storage. We can help narrow the choice before you order.

Ask LiFePO4 Australia

Technical notes

This page is practical buying guidance based on the current EVE MB31, EVE LF334 and REPT 345Ah product information and the distinction between energy-focused ESS duty and higher-output battery duty. Approximate kWh figures use 3.2V nominal voltage and are not usable-energy guarantees. Always confirm continuous current, pulse current, compression, operating temperature and cycle-test conditions against the exact datasheet for the batch being supplied.

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LiFePO4 Australia
Deye Review 2026 and Beyond Products and Features

Here is a comprehensive and technical deep dive into DEYE’s newest lineup of hybrid inverters and all-in-one energy solutions, based on the insights revealed at their recent All-Energy showcase.

DEYE’s Next-Gen All-In-One Hybrid Inverter Ecosystem

The energy storage and hybrid inverter landscape is shifting rapidly from modular, decentralized components to highly integrated, all-in-one ecosystem architectures. DEYE, a manufacturer heavily embedded in the global solar market (often white-labeled under various brand names), has unveiled its next generation of hybrid energy systems.

Moving far beyond simple solar inversion and battery charging, DEYE’s new hardware operates as a holistic Energy Management System (EMS). Let’s break down the technical specifications and architectural advantages of their latest product suite.

1. Smart Load Integration & LoRaWAN Connectivity

Most traditional inverters focus purely on supply-side metrics—managing generation and storage. DEYE’s new generation flips this by actively controlling demand-side loads.

The new inverters feature a built-in EMS with natively integrated LoRaWAN (Long Range Wide Area Network) protocols.

  • Complete Wireless Control: Using LoRaWAN wireless dongles, the inverter can communicate with remote hardware—like EV chargers, smart relays, and smart meters—up to 200 meters away without requiring physical cable runs.
  • Network Independence: Unlike typical IoT smart home ecosystems, DEYE’s communication protocol does not rely on the customer’s local Wi-Fi router. The inverter creates its own self-contained mesh, ensuring uninterrupted load control (e.g., scheduled EV charging based on Time-of-Use tariffs or excess PV production) even during localized network outages.

2. The “All-in-One” Residential Solution: The Inverter is now built in to the stack

DEYE Low Voltage Residential All in one BESS 1P 10kW

With Inbuilt Inverter

48v Lithium Battery Australia CEC
With External Hybrid Inverter

For residential applications, DEYE has introduced a highly stackable “All-in-One” unit that supports both on-grid and full off-grid topologies.

  • Inverter Ratings: The range supports single-phase models from 3.6 kW up to 8 kW, and three-phase models from 5 kW up to 12 kW.
  • Storage Density: The system utilizes low-voltage 5.12 kWh battery modules. A single stack can accommodate up to 6 modules (approx. 30 kWh).
  • Massive Expandability: You can parallel up to 6 of these battery clusters to a single inverter, pushing the maximum localized storage capacity to an impressive 180 kWh.
  • The “6-in-1” Architecture: DEYE classifies this as a 6-in-1 unit, most notably featuring direct diesel generator integration. The inverter can dynamically control a generator start/stop relay based on State of Charge (SoC) parameters, making it an ideal candidate for off-grid and rural properties.

3. Integrated Gateway & Ultra-Fast Islanding (4ms)

A major pain point in standard whole-home backup installations is the requirement for a separate external gateway or Automatic Transfer Switch (ATS)—such as the Tesla Backup Gateway. These external units are necessary to physically decouple the home from the grid during blackouts to ensure compliance with anti-islanding regulations (zero export).

DEYE has built this gateway hardware directly into the inverter chassis.

  • Fewer Points of Failure: This native integration reduces installation time, minimizes required wall real estate, and eliminates the need for third-party ATS wiring.
  • 4-Millisecond Transfer Time: In the event of a grid failure, the inverter detects the voltage drop and switches to off-grid backup mode in just 4 milliseconds [04:07]. This UPS-grade transfer time is fast enough to keep sensitive electronics, servers, and desktop computers running without rebooting.

4. Unmatched Phase Paralleling Architecture

Where DEYE truly flexes its engineering muscles is in its master/slave paralleling capabilities, which treat subsequent inverters as modular power blocks rather than isolated systems.

  • Single-Phase: Up to 16 inverters can be paralleled together.
  • Three-Phase: Up to 10 inverters can be paralleled together.

Crucially, the backup (EPS) ports can also be paralleled [06:01]. If an 8 kW single-phase inverter isn’t sufficient to handle the inrush current of a home’s HVAC system during a grid outage, you can parallel multiple units to stack their continuous backup output. The architecture allows you to easily expand the system’s power ceiling retroactively as site requirements grow.

5. C&I (Commercial & Industrial) Muscle

Scaling up from the residential sector, DEYE is rolling out heavy-duty solutions for the C&I market, maintaining the exact same modular philosophy.

BOS-G Pro- New Model

BOS G Pro 16x5kwh 82kwh
  • BOS-G Pro High-Voltage Batteries: Utilizing 5.12 kWh modules, these high-voltage batteries can be stacked up to 12 per rack. You can tie up to 16 racks together, bringing total storage capacity to just under 1 Megawatt-hour (MWh).
  • 80 kW Three-Phase Hybrid Inverter: These massive storage arrays mate to DEYE’s pending 80 kW hybrid inverters. Mirroring the residential lineup, up to 16 of these 80 kW units can be run in parallel, easily pushing the system into the multi-megawatt operational tier [06:51].
  • Note: DEYE also noted that a massive 300 kW utility-scale inverter is currently navigating the compliance paperwork.

Summary

DEYE is aggressively targeting the pain points of modern solar installers and system architects. By bringing the EMS, grid gateway, and LoRaWAN communications inside the inverter casing, they are cutting down on physical clutter while offering an incredibly resilient, UPS-grade backup solution. Whether it’s an 8 kW off-grid cabin or a 1 MWh commercial facility, their paralleling architecture allows for virtually unlimited scaling.

REAL WORLD AUSTRALIAN INSTALLS

Check out what is coming with this video by the Smart Energy Lab

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LiFePO4 Australia
How to Connect a JK Inverter BMS to Victron

Victron + JK inverter BMS guide

How to connect a JK Inverter BMS to a Victron GX system

This guide is for JK PB-series / JK Inverter BMS models with CAN communication, connected to a Victron GX device such as a Cerbo GX, Ekrano GX, Venus GX, or Venus OS system.

CAN communication Victron GX DVCC LiFePO4 battery systems

Best connection

Use CAN from the JK inverter BMS to the Victron GX device. This is the cleanest setup for a managed lithium battery because the GX device can receive charge and discharge limits from the BMS.

Main thing to avoid

Do not assume a normal Ethernet cable is correct. The RJ45 connectors look familiar, but the CAN pinout is not standard Ethernet.

Exact model matters

JK hardware revisions and app labels can differ. Always verify the CAN port, cable pinout, and protocol setting for the exact BMS you are installing.

Safety note: this is a communication guide, not a complete battery build guide. Battery assembly, fusing, isolation, earthing, enclosure design, firmware, inverter settings, and local electrical rules still matter. If you are not sure, have the system checked by a suitably qualified person.

What this connection actually does

When the JK BMS is communicating properly over CAN, the Victron GX device can see the battery as a managed lithium battery. With DVCC enabled, the GX device can use BMS-provided limits such as charge voltage limit, charge current limit, and discharge current limit.

In practical terms, this lets the BMS tell Victron equipment when to charge harder, slow down, or stop. It is a better approach than relying only on fixed charge voltages inside the inverter or MPPT.

Recommended wiring approach

For current JK inverter BMS setups, the usual recommendation is a Victron VE.Can to CAN-bus BMS Type B cable, Victron part number ASS030720018. Some users report that Type A can work because CAN-H and CAN-L are the same and the ground is less critical, but Type B is the cleaner starting point for JK inverter BMS.

FunctionVictron GX sideJK inverter BMS sideNotes
CAN-HPin 7Pin 4CAN high signal.
CAN-LPin 8Pin 5CAN low signal.
GNDPin 3Usually pin 2 for Type BSome JK documents/variants show different ground references. Verify before crimping.
Important: if making your own cable, test continuity before plugging it into equipment. Many JK/Victron communication problems are cable, port, or protocol-selection problems rather than a faulty BMS.

Step-by-step setup

  1. Confirm the correct JK port

    Use the JK BMS CAN port, not the RS485 port. On some JK documentation or hardware revisions, labels and port order have caused confusion, so check the manual and look for CAN traffic if the GX does not detect the battery.

  2. Connect the CAN cable

    Connect the JK CAN port to the Victron GX CAN port intended for managed batteries. On older Cerbo GX units, this is commonly the fixed BMS-Can port. On newer GX devices, the VE.Can ports may be configurable.

  3. Set the JK protocol

    Open the JK app, enter settings, and set the inverter/CAN protocol to the Victron CAN protocol. On many JK PB models this is shown as Victron or protocol number 4. Restart the BMS after changing protocol.

    Watch the JK app protocol setting walkthrough here without leaving this guide.

  4. Configure the Victron CAN port

    On the GX device, go to the CAN port settings and set the relevant port to a BMS/CAN profile at 500 kbit/s where applicable. Older Cerbo GX BMS-Can ports are fixed at 500 kbit/s.

  5. Check the GX device list

    Return to the device list. If communication is working, the battery should appear as a connected BMS/battery device. Check that voltage, current, SOC, and limits look sensible.

  6. Enable DVCC

    Enable DVCC/Charge Control on the GX device so Victron chargers and inverter/chargers can follow BMS-provided limits. Confirm charge voltage limit, charge current limit, and discharge current limit are being received.

DVCC settings to check

With a managed CAN-bus battery, the key is not to manually force charge voltages everywhere. The BMS should be sending limits and the Victron system should be following them.

  • DVCC / Charge Control enabled.
  • Battery appears in the GX device list.
  • CVL, CCL and DCL values look realistic.
  • Charge current limits are not higher than the battery, wiring or BMS can safely support.
  • Any manual voltage limiting is intentional and understood.

Troubleshooting

The BMS is not showing up on the Victron GX device
  • Confirm you are plugged into the JK CAN port, not RS485.
  • Confirm the JK protocol is set to Victron CAN / protocol 4 where applicable.
  • Confirm the GX CAN port is set for the correct BMS/CAN profile and speed.
  • Try a known-good Type B cable or continuity-test your custom cable.
  • Check termination on the CAN bus.
The battery appears but charge control does not seem right

Check that DVCC is enabled and that the GX device is receiving CVL, CCL and DCL from the battery. Also check whether any manual charge voltage/current limits are overriding or reducing what you expect.

I have multiple JK batteries in parallel

Normally one master BMS communicates with the Victron GX device, while the JK batteries communicate with each other using the JK parallel/RS485 arrangement. Addressing must be set correctly. Follow the JK manual for your exact model.

Can I use RS485 or Bluetooth instead?

For a serious 48V Victron power system, wired CAN is the preferred path when the JK inverter BMS supports it. RS485 or third-party Venus OS drivers can be useful for some older/non-inverter BMS models, but they are not the cleanest first choice for a managed battery system.

Useful references

Need help choosing the right JK, Victron or LiFePO4 battery setup?

If you are building a 48V battery system and want it to communicate properly with Victron, it is worth checking the BMS model, battery design and cable choice before ordering parts.

Contact LIFEPO4 Australia
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Can a Non-CEC Inverter Be Connected to the Australian Grid?

Australian grid connection guide

Can a non-CEC inverter be connected to the Australian grid?

For a normal grid-connected solar or battery system, you should assume the answer is no unless your electricity distributor gives written approval. In practice, Australian DNSPs usually require grid-connected inverters to be on the Clean Energy Council approved inverter list.

Grid-connected systems CEC inverter list DNSP approval Off-grid exception
General information only: this article is not legal or electrical advice. Rules change, and the final answer depends on your inverter model, state, distributor, connection type, export control requirements and installation design. Always confirm with the local DNSP and a suitably licensed electrician before buying equipment.

Grid-parallel

If the inverter can operate in parallel with the distribution grid, the distributor normally wants a CEC-listed inverter and the correct AS/NZS 4777.2 settings.

Off-grid

A true off-grid system that cannot parallel with the grid is different. CEC grid-listing may not be the same issue, but electrical safety and installation rules still apply.

Zero export

Zero export does not automatically make a system “not grid connected”. If it is connected in parallel with the grid, the DNSP can still require approval and compliant equipment.

The simple answer

The Clean Energy Council does not personally approve your grid connection. Your local electricity distributor, usually called the DNSP, controls the connection process.

However, the CEC approved inverter list is the main product list used across Australia to check whether an inverter has evidence of compliance with the relevant standards. That is why installers, retailers, rebate programs and distributor portals care so much about whether the inverter is CEC-listed.

So while the technical authority is the DNSP, the practical answer is simple: if the inverter is not on the CEC approved inverter list, most normal grid connection applications will be difficult or impossible.

Why “CEC approved” matters

AreaWhy it mattersWhat to check
DNSP connection approvalThe distributor needs to know the inverter can behave safely and correctly on the grid.CEC listing, AS/NZS 4777.2 compliance, regional settings and DNSP-specific conditions.
STCs and rebatesFinancial incentives often require approved components and compliant installation.Clean Energy Regulator and relevant state or rebate scheme rules.
Installer sign-offA licensed installer may not be willing or able to sign off a non-listed inverter for grid connection.Exact equipment model, wiring arrangement, commissioning requirements and certificates.
Future serviceabilityUnsupported or unlisted equipment can become a problem during warranty, inspections, insurance or sale of the property.Local support, documentation, firmware, distributor approval and compliance evidence.

What about a Victron Multi RS Solar?

A common example is the Victron Multi RS Solar. It is a capable product for the right application, especially off-grid or specialist systems, but that does not automatically mean it is suitable for Australian grid-parallel connection.

If the exact model is not on the CEC approved inverter list for grid connection, do not assume it can be connected to the grid. Treat it as an off-grid or specialist product unless the local DNSP and a qualified installer confirm otherwise in writing.

Important distinction: a high-quality inverter can still be the wrong product for a grid-connected Australian installation if it does not have the required Australian grid certification, listing or distributor approval.

When a non-CEC inverter may still be useful

  • True off-grid systems with no grid-parallel operation.
  • Generator-backed systems where the inverter is not connected to the distribution grid.
  • Specialist engineered systems with formal DNSP approval.
  • Research, testing or temporary setups that are not connected to the public grid.

When to avoid it

  • You want STCs, rebates or a standard grid application.
  • The system will export or can operate in parallel with the grid.
  • The installer cannot select the inverter in the DNSP portal.
  • You need a simple, insurable, supportable home battery installation.

If you still want to try

Some distributors may have a written-approval pathway for unusual equipment, but that is not the same as a general permission to install anything. You would normally need strong evidence, and approval should be sought before purchase.

  • Ask the DNSP whether they will assess a CEC-unlisted inverter proposal.
  • Ask what certification evidence they require, including AS/NZS 4777.2 evidence.
  • Confirm whether CSIP-AUS, dynamic export, emergency backstop or utility-server communication applies.
  • Get the answer in writing before spending money on the inverter.
  • Do not rely on “zero export” as a workaround unless the DNSP confirms the design is acceptable.

Frequently asked questions

Is the CEC the same as the grid connection authority?

No. The DNSP controls the grid connection process. The CEC approved inverter list is the practical product list used to show an inverter meets relevant standards and is acceptable for many connection and incentive processes.

Can I use a non-CEC inverter if I set it to zero export?

Not automatically. If the inverter is connected in parallel with the grid, your distributor may still treat it as a grid-connected inverter energy system and require approval, compliant settings and approved equipment.

Can I use a non-CEC inverter off-grid?

Possibly, if it is a true off-grid system and installed safely. That is a different question from connecting it to the public distribution grid. Electrical safety, battery standards, isolation, generator integration and local rules still matter.

Will I lose STCs or rebates with a non-CEC inverter?

You may. Many incentive pathways require approved components and compliant installation. Confirm with the Clean Energy Regulator, the rebate program and your installer before assuming the system qualifies.

Useful official references

Want a battery or inverter system that can actually be approved?

Tell us what you are trying to build. We can help separate off-grid equipment, grid-approved inverter choices, DNSP limits and rebate eligibility before you buy the wrong hardware.

Start a system enquiry
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EVE Unveils largest LiFePO4 MB56 Technology yet! 836kWh Split-Type Modular Cabinet

The future of energy storage is here, and it’s bigger than before! At the recent SNEC 2025 exhibition, industry giant EVE Energy unveiled a suite of groundbreaking LiFePO4 battery solutions that are set to revolutionize the commercial and industrial energy storage landscape. Such as the 836kWh Split-Type Modular Cabinet, built around the MB56 628ah LFP cell. For Australian businesses looking to gain a competitive edge in the renewable energy sector, this is an opportunity you won’t want to miss.

17503818078252741
on the right you can see the 836kWh Split-Type Modular Cabinet

Introducing the 836kWh Split-Type Modular Cabinet

At the forefront of this new lineup is the 836kWh Split-Type Modular Cabinet. This innovative system is specifically designed for overseas markets and is perfectly suited for Australian commercial and industrial applications. Here’s what makes it a game-changer:

  • Modular and Scalable: The system is incredibly flexible, with a modular design that can be configured in various ways. It’s compatible with both 1000V and 1500V systems and can be expanded up to an impressive 5MWh. This means it can be tailored to meet the specific needs of your project, from small-scale commercial to large-scale industrial.
  • Overcoming Logistical Hurdles: One of the biggest challenges with large-scale energy storage is transportation and installation. EVE has solved this with an innovative split-design, allowing for more flexible deployment. This clever design not only overcomes logistical limitations for large cabinets but also increases energy density by 65% and reduces the system’s footprint by 37%.
  • Enhanced Safety and Intelligent Operation: Safety is paramount, and the 836kWh cabinet delivers. It features “thermal-electric separation” and “liquid-electric separation” designs, along with a fire-resistant layer that provides 15% more insulation than traditional cabinets. The smart management system ensures precise warnings and extends the system’s lifespan, making it a reliable and long-term investment.

Pushing the Boundaries with “Mr. Big” and “Mr. Giant”

EVE Energy also showcased its commitment to large-scale energy solutions with the “Mr. Big” super-large capacity 628Ah cell and the “Mr. Giant” 5MWh minimalist large system. These products are designed for large-scale power station projects and demonstrate the incredible potential of LiFePO4 technology.

What This Means for Australia

The launch of these new products from EVE Energy comes at a pivotal time for Australia’s energy market. As we continue to transition towards a renewable energy future, the demand for reliable, scalable, and cost-effective energy storage solutions is at an all-time high. The modularity and logistical advantages of the 836kWh cabinet make it an ideal choice for Australian businesses looking to invest in energy storage, whether for behind-the-meter applications or to support the grid.

LIFEPO4 Australia: Your Partner in Energy Innovation

At LIFEPO4 Australia, we are excited to be at the forefront of this technological advancement. As your trusted partner, we can assist you with:

  • Sourcing and Procurement: We have the expertise to source these cutting-edge EVE Energy products directly for your projects.
  • Seamless Importation: Our team will handle the complexities of importation, ensuring a smooth and hassle-free process.
  • Negotiating Favorable Terms: We can leverage our industry connections to negotiate excellent terms, ensuring you get the best possible value for your investment.

The future of energy storage has arrived, and it’s more accessible than ever. If you’re ready to explore how EVE Energy’s new LiFePO4 solutions can transform your business, we’re here to help.

Contact LIFEPO4 Australia today to discuss your energy storage needs and to learn more about how we can help you power your future.

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LiFePO4 Australia ,
How Lithium Prices Influence ESS-Grade LFP Cell Costs

Introduction

How Lithium Prices Influence ESS-Grade LFP Cell Costs Lithium iron phosphate (LiFePO₄ or LFP) is the chemistry of choice for stationary energy storage systems (ESS) thanks to its safety, cycle life, and cost stability.
But battery-grade lithium carbonate (Li₂CO₃) prices can move sharply. The big question: does this heavily impact the final cost of an ESS battery?
The answer: it has a surprisingly small effect — even when prices double.

1. Real-World LFP Cell Examples

Two widely used prismatic LiFePO₄ cells from EVE Energy are great case studies:

  • EVE MB31 – 314 Ah large-format cell (~1 kWh, ~5.6 kg)
  • EVE LF100LA – 100 Ah cell (~0.326 kWh, ~1.98 kg)

Exact lithium content is proprietary, but we can calculate it closely using LiFePO₄’s chemistry.

2. Lithium Carbonate Content in LFP Cells

Lithium makes up about 4.4% of LiFePO₄’s cathode mass, and lithium carbonate is 18.8% lithium by weight.

From this, manufacturing each 1 kWh of LFP storage capacity needs ~0.47 kg of lithium carbonate.

This means:

  • MB31 (≈1 kWh) → ~0.47 kg Li₂CO₃ per cell
  • LF100LA (≈0.326 kWh) → ~0.153 kg Li₂CO₃ per cell

3. Price Change: USD $10,000/t → USD $20,000/t

Let’s compare the impact of lithium carbonate doubling from USD $10/kg to USD $20/kg.

Per cell:

  • MB31 314 Ah:
    • $10/kg → USD $4.70 lithium cost
    • $20/kg → USD $9.40 lithium cost
    • Increase: USD $4.70 (~AUD $7)
  • LF100LA 100 Ah:
    • $10/kg → USD $1.53 lithium cost
    • $20/kg → USD $3.06 lithium cost
    • Increase: USD $1.53 (~AUD $2.30)

4. Effect on a 51.2 V Battery Pack (16 Cells)

Most 51.2 V ESS batteries are built from 16 cells in series:

  • Using MB31 cells (314 Ah / ~1 kWh each):
    • 16 × USD $4.70 increase = USD $75.20 (~AUD $112) more if Li₂CO₃ doubles in price.
  • Using LF100LA cells (100 Ah / ~0.326 kWh each):
    • 16 × USD $1.53 increase = USD $24.48 (~AUD $36) more if Li₂CO₃ doubles in price.

5. Why the Impact Is So Small

Even a 100% jump in lithium carbonate prices adds less than AUD $120 to a large 51.2 V / 314 Ah battery, and under AUD $40 to a smaller 100 Ah version.

That’s because:

  • Lithium carbonate is only a small fraction of the cell’s mass.
  • The rest of the cost comes from iron, phosphorus, graphite, copper, aluminium, electrolyte, casings, BMS, labour, testing, logistics, and installation.

6. Key Takeaways

  • Doubling lithium carbonate from USD $10k/t → USD $20k/t adds:
    • ~USD $75 (~AUD $112) to a large 51.2 V 314 Ah pack
    • ~USD $24.50 (~AUD $36) to a smaller 51.2 V 100 Ah pack
  • Other materials, manufacturing, and installation dominate ESS battery costs.
  • Lithium price swings are important, but they don’t make or break ESS battery affordability.

Sources:

EVE datasheets of 100ah and 314ah cells.

  • Lithium content calculations based on LiFePO₄ molecular composition.
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