Fronius Reserva Battery System
Store more of your solar energy with the Fronius Reserva Battery, a high-voltage, DC-coupled battery storage solution designed to work with Fronius hybrid inverters. With modular capacity from 6.31 to 15.79 kWh, Reserva gives you flexible energy storage for greater use of your solar power.
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Make More of Your Solar Energy with Flexible Battery Storage
Choose the Right Fronius Reserva Capacity for Your Home
Fronius Reserva uses a modular battery design, allowing you to select the storage capacity that fits your energy needs. Each battery module provides 3.15 kWh of usable capacity, with complete Reserva towers available from 6.31 kWh to 15.79 kWh using two to five modules. The system can also support up to four batteries in parallel, providing additional flexibility for larger energy storage requirements.
Modules
Per tower
Tower
Warranty
Reliable Backup Power with Fronius Reserva
The Fronius Reserva can be combined with a Fronius GEN24 Plus hybrid inverter to provide backup power when the grid is unavailable. With the Fronius Backup Controller and Backup Switch, the system can switch to full backup operation automatically or manually. These components can be installed in the switchboard, helping create a practical backup power setup.
- Automatic or manual backup power switching
- Compatible with Fronius GEN24 Plus
- Fronius Solar.web monitoring
- IP65 protection rating
- Maximum 32 A output current, subject to inverter limitations
Fronius Reserva Battery Specifications
Power
Usable storage capacity
Rated voltage
Max. output current
DIMENSIONS (H/W/D) & WEIGHT
86.5–187 kg
Key features
DC-coupled high voltage
Stores solar energy with minimal losses.
2–5 battery modules
6.31–15.79 kWh usable capacity per tower.
LFP battery chemistry
Uses lithium iron phosphate (LFP) battery cell chemistry.
Parallel Operation
Up to 4 Fronius Reserva batteries can operate in parallel.
Fronius Reserva 6.3 / 9.5 / 12.6 / 15.8 kWh
| Model | Reserva 6.3 | Reserva 9.5 | Reserva 12.6 | Reserva 15.8 |
|---|---|---|---|---|
| Usable capacity | 6.31 kWh | 9.47 kWh | 12.63 kWh | 15.79 kWh |
| Number of battery modules | 2 | 3 | 4 | 5 |
| Rated voltage | 204.8 V | 307.2 V | 409.6 V | 512 V |
| Voltage range | 185.6 – 227.2 V | 278.4 – 340.8 V | 371.2 – 454.4 V | 464 – 568 V |
| Maximum output current | 32 A | 32 A | 32 A | 32 A |
| Dimensions (H × W × D) | 890 × 772 × 176 mm | 1,140 × 772 × 176 mm | 1,390 × 772 × 176 mm | 1,640 × 772 × 176 mm |
| Total weight | 86.5 kg | 120 kg | 153.5 kg | 187 kg |
General Specifications
| Battery cell chemistry | Lithium iron phosphate (LFP) |
| Parallel operation | Up to 4 batteries |
| Compatible inverters | Fronius hybrid inverters (except Fronius Symo Hybrid) |
| Protection class | IP65 |
| Max. altitude above sea level | 2,000 m |
| Ambient temperature range | −20 °C to +55 °C |
| Permissible humidity | 5% – 95% |
| Installation | Indoor and protected outdoor areas |
| DC connection technology | Stäubli MC4 Evo Stor DC connectors |
| Interfaces | RS485 |
| Certificates and standards | IEC 62619:2022, CE, VDE 2510-50, IEC 62477-1, UN 38.3 |
| Warranty | 10 years |
Charging and discharging current is limited by the inverter. Regardless of the number of Fronius Reserva towers connected in parallel, the maximum output current is limited to 32 A. Charging and discharging capacity may be limited depending on temperature.
Questions
FAQs
Have a question? Call 1300 646 419 to speak directly with the Easy Solar team about batteries, installation and your energy storage options.
The Fronius Reserva is compatible with Fronius hybrid inverters, including the Fronius GEN24 Plus. The Fronius Symo Hybrid is not compatible with Reserva.
Yes. The Fronius Reserva uses 2 to 5 battery modules, with each module providing 3.15 kWh of usable capacity. This gives each tower a usable capacity of 6.31 to 15.79 kWh. Up to 4 Reserva batteries can operate in parallel for additional storage capacity.
Yes. When combined with a compatible Fronius hybrid inverter, the Fronius Backup Controller and Backup Switch can enable full backup power operation automatically or manually when the grid is unavailable.
Yes. Fronius Reserva is rated IP65 and can be installed indoors or in protected outdoor areas. Its specified ambient temperature range is -20°C to +55°C. Charging and discharging capacity may be limited depending on temperature.
Free quote
Get a quote for your home.
Send us your latest power bill and, if you already have solar, a photo of your inverter. We’ll review your energy requirements and help you choose a suitable Fronius Reserva battery configuration for your home.