The Fronius Storage Solution: Reserva
Efficient DC-coupled high-voltage battery for storing solar energy with minimal losses.
Product Overview
The Fronius Reserva is an efficient DC-coupled high-voltage battery designed for storing solar energy with minimal losses. It offers flexible expansion capabilities, supporting two to five modules, and is perfectly matched to Fronius hybrid inverters for maximum performance. The system benefits from European data security and fast service, ensuring high reliability.
Key Features:
- The Heart of Your PV System: When paired with the Fronius GEN24 Plus hybrid inverter, the Reserva enables users to enjoy solar energy 24 hours a day, increasing energy independence.
- Backup Power: The Fronius Backup Controller facilitates automatic switching to full backup power operation, providing a cost-effective solution that can be integrated into control cabinets, saving space and eliminating the need for additional hardware.
- Complete Control: The Fronius Solar.web monitoring tool allows users to track their PV system's performance anytime, anywhere, via a dedicated app or web interface, ensuring the energy transition stays on track.
Technical Details
Electrical Parameters
| Electrical parameters | Unit | Reserva 6.3 | Reserva 9.5 | Reserva 12.6 | Reserva 15.8 |
|---|---|---|---|---|---|
| Usable Energy | kWh | 6.31 | 9.47 | 12.63 | 15.79 |
| Nominal Energy | kWh | 6.68 | 10.03 | 13.37 | 16.71 |
| Max. Charge / Discharge Power 1 | kW | 6.55 | 9.83 | 13.10 | 16.38 |
| Short Circuit Current | A | 1,700 | 1,900 | 2,100 | 2,241 |
| Number of battery modules | 2 | 3 | 4 | 5 | |
| Rated voltage | V | 204.8 | 307.2 | 409.6 | 512 |
| Voltage range | V | 185.6~227.2 | 278.4~340.8 | 371.2~454.4 | 464~568 |
| Maximum output current 2 | A | 32 | 32 | 32 | 32 |
| Depth of Discharge | % | 94.5 | 94.5 | 94.5 | 94.5 |
1 Maximum charging and discharging power can vary depending on temperature, battery state of charge, and the connected inverter.
2 The charging and discharging current is limited by the inverter.
General Data
| General data | Unit | Reserva 6.3 | Reserva 9.5 | Reserva 12.6 | Reserva 15.8 |
|---|---|---|---|---|---|
| Battery cell chemistry | Lithium iron phosphate (LFP) / Pouch cells | ||||
| Parallel operation 3 | Up to 4 batteries | ||||
| Dimensions (height x width x depth) | mm | 890 x 772 x 176 | 1,140 x 772 x 176 | 1,390 x 772 x 176 | 1,640 x 772 x 176 |
| Total weight | kg | 86.5 | 120 | 153.5 | 187 |
| Compatible inverters 4 | Fronius hybrid inverter | ||||
| Protection class | IP65 | ||||
| Max. altitude above sea level | m | 2,000 | |||
| Ambient temperature range 5 | °C | -20 to +55 | |||
| Permissible humidity | % | 5 to 95 | |||
| Installation | Indoor and protected outdoor areas | ||||
| DC connection technology | DC-connectors Stäubli MC4 Evo Stor | ||||
| Certificates and compliance with standards | IEC62619:2022; CE; VDE 2510-50; IEC62477-1; UN38.3 | ||||
| Interfaces | RS485 | ||||
| Warranty | 10 years | ||||
| Country of manufacture | China | ||||
3 Regardless of the number of Fronius Reserva battery towers connected in parallel, the maximum output current is limited to 32 A. Example: Even with 4x15.8 kWh, the maximum DC charging/discharging power of the Fronius Verto Plus 30 remains approx. 16.38 kW.
4 Except Fronius Symo Hybrid.
5 Depending on the temperature, the charging/discharging capacity can be limited.
Reserva Components
The Fronius Reserva system is comprised of several key components:
- BMS (Battery Management System): This unit manages the battery's operation and health. It has dimensions of 330 x 772 x 176 mm and weighs 16 kg (25 kg with packaging).
- Base Unit: This forms the structural foundation of the system. It measures 60 x 772 x 176 mm and weighs 3.5 kg (33.5 kg with packaging).
- Module: These are the individual battery energy storage units. Each module has dimensions of 250 x 772 x 176 mm and weighs 33.5 kg (36.5 kg with packaging). The system can be expanded with multiple modules.
The system is visually represented by a tall, white, modular battery unit, with separate depictions of the BMS, Base, and Module components.
Company Information
For more information about the Fronius Reserva, please visit: www.fronius.com.au/reserva
Contact Information:
- Fronius Australia Pty Ltd.
90-92 Lambeck Drive
Tullamarine VIC 3043
Australia
Email: sales.australia@fronius.com
Website: www.fronius.com.au - Fronius International GmbH
Froniusplatz 1
4600 Wels
Austria
Email: pv-sales@fronius.com
Website: www.fronius.com
Document version: EN_AUS V03 July 2025. Text and illustrations were accurate at the time of printing. Fronius reserves the right to make changes.
