Description
Keep more of your solar inside the Fronius ecosystem.
A slim, high-voltage battery retrofit for compatible three-phase Fronius hybrid systems. Store daytime solar, reduce evening grid use and monitor the battery, inverter and household energy flows together in Solar.web.
Five LFP modules
IP65 protected
10-year warranty
A natural upgrade for compatible Fronius three-phase systems
Reserva is Fronius’s own high-voltage, DC-coupled battery. It is designed to work directly with supported Fronius hybrid inverters, giving homeowners a coordinated system rather than a collection of separate platforms. Solar.web provides one place to view solar production, battery state, household consumption and grid exchange.
Price is before any applicable government incentive and assumes a straightforward retrofit to a compatible three-phase Fronius hybrid inverter with a suitable smart meter already installed. Final eligibility, inverter compatibility, backup scope, switchboard work, cable runs and installed price are confirmed in a written site-specific quote.
What is included
Complete 15.79kWh tower
Five 3.15kWh Fronius Reserva LFP battery modules, the Reserva BMS and the matching base.
Standard installation allowance
Mechanical and electrical installation for a straightforward retrofit, commissioning and connection to the approved Fronius system design.
System commissioning
Battery commissioning, inverter integration and confirmation that the system is visible through the supported Fronius monitoring workflow.
Site-specific advice
Compatibility, placement, battery-incentive requirements and optional backup are checked before the final order and installation date are confirmed.
Why homeowners choose Fronius Reserva
Efficient DC coupling
Excess solar charges the battery on the DC side, avoiding unnecessary conversion stages and helping the system retain more of the energy produced on the roof.
Strong charge and discharge capability
The 15.8 configuration is rated for up to 16.38kW battery charge/discharge power, although the connected inverter, temperature and state of charge can limit actual output.
Safe LFP chemistry
Lithium iron phosphate pouch cells provide a durable storage platform, backed by Fronius system support and a 10-year battery warranty.
A very slim footprint
At only 176mm deep, the tower is designed to use wall space efficiently while remaining floor mounted and serviceable.
Compatibility and backup
The 15.79kWh Reserva configuration is intended for supported three-phase Fronius hybrid inverter families. Fronius currently lists compatibility with Symo GEN24 Plus, Symo GEN24 Plus SC and Verto Plus models; the legacy Symo Hybrid is not supported. Inverter firmware, exact power rating and country certification must be checked during system design.
Backup is an optional system-design item, not automatically included in this package. A compatible Fronius backup solution, switchboard changes and dedicated or whole-home backup design may add cost. The loads that can be supported depend on the inverter, controller, battery state and approved installation.
Built for connected monitoring
Reserva works inside the Fronius Solar.web platform, so the battery can be viewed alongside the compatible inverter and other Fronius devices. Fronius states that Solar.web data is stored on European servers and that its information-security management meets ISO 27001 requirements.
Package scope and pricing notes
| Included hardware | 5 x Fronius Reserva 3.15kWh modules, 1 x Reserva BMS and matching base |
|---|---|
| Installed-price basis | Straightforward retrofit to a compatible three-phase Fronius hybrid inverter and suitable existing smart meter |
| Not automatically included | New inverter, backup controller, switchboard upgrades, complex cable routes, trenching, bollards, travel outside the standard service area or remedial electrical work |
| Government incentives | Any federal or state incentive is applied only after the exact product configuration, installation and customer eligibility are confirmed at the installation date |
Technical specifications
| Model | Fronius Reserva 15.8 / 15.79kWh three-phase configuration |
|---|---|
| Usable energy | 15.79kWh |
| Battery modules | 5 x 3.15kWh modules |
| Battery chemistry | Lithium iron phosphate (LFP) pouch cells |
| Rated voltage | 512V DC |
| Operating voltage range | 464-568V DC |
| Maximum battery charge/discharge power | 16.38kW; actual power may be limited by inverter, temperature, battery state and system design |
| Maximum output current | 32A |
| Dimensions (H x W x D) | Approximately 1610 x 780 x 176mm |
| Total weight | Approximately 187kg |
| Protection class | IP65 |
| Installation location | Indoor or protected outdoor area, subject to manufacturer and Australian installation requirements |
| Ambient temperature range | -20°C to +55°C; charging/discharging capability may be limited by temperature |
| Permissible humidity | 5-95% |
| Maximum installation altitude | 2000m above sea level |
| Communication | Modbus / RS485 |
| Parallel operation | Up to 4 battery towers; system current remains subject to Fronius limits |
| Compatible inverter families | Supported Fronius Symo GEN24 Plus, Symo GEN24 Plus SC and Verto Plus models; verify exact model and firmware before order |
| Compliance | IEC 62619:2022, CE, VDE 2510-50, IEC 62477-1 and UN 38.3 |
| Warranty | 10 years, subject to Fronius Australia warranty terms |
What can change the installed price?
The guide price assumes a compatible inverter, suitable smart meter and straightforward installation. A final quote may change for backup requirements, switchboard upgrades, long cable runs, metering or network work, difficult access, bollards or protection requirements, travel, trenching or remedial electrical work.
Compatibility comes first: we confirm the exact inverter model, firmware, battery placement and backup expectations before the system is ordered.
Is this the right battery for your home?
Send us your suburb, a recent electricity bill, your existing Fronius inverter model, solar-system size and the appliances you want supported in a blackout. We can then confirm whether Reserva 15.8 is compatible and price the right installation and backup scope.
Start your Fronius Reserva enquiry
This short form confirms genuine interest in the ,699 advertised package. Our own friendly installation team will check the basics and explain any site-specific requirements clearly.
Already have your site photos ready? Complete the technical form with switchboard, inverter and proposed battery-location photos.
Important: Product specifications, approved-product listings, warranty terms, incentive rules and pricing can change. Final eligibility, output, backup performance and installed scope depend on the exact inverter and battery combination, site assessment, network requirements and installation date. *Maximum battery power is a product rating; actual charge/discharge power may be limited by the connected inverter, temperature, state of charge and approved system design.
