Fronius · Home battery model
Fronius Reserva
Fronius Reserva is a current high-voltage LFP home battery with four configurations from 6.31 to 15.79 kWh usable per tower.
Specifications
| Specification | Value |
|---|---|
| Usable capacity (kWh) | 6.31, 9.47, 12.63 or 15.79 |
| Cell chemistry | LFP |
| Scalable | yes; two to five modules per tower and up to four batteries in parallel |
| Maximum stack capacity (kWh) | 15.79 usable per tower; 63.16 by arithmetic across four maximum towers |
| System coupling | high-voltage DC-coupled battery for compatible Fronius hybrid inverters |
| Backup capable | yes; requires a compatible hybrid inverter and installed backup arrangement |
| Warranty (years) | 10 |
| IP rating | IP65 |
| Operating-temperature range (°C) | -20 to 55, with temperature-dependent power limits |
Fronius Reserva is a current high-voltage LFP battery designed for compatible Fronius hybrid inverters. It is DC-coupled, so solar power can be stored on the DC side of the inverter before conversion for household use.
Four tower sizes
Reserva 6.3, 9.5, 12.6 and 15.8 contain two, three, four and five modules. Their exact usable capacities are 6.31, 9.47, 12.63 and 15.79 kWh. Rated voltage rises with the module count from 204.8 to 512 V.
Maximum output current is 32 A, subject to the inverter’s own charge and discharge limit. Up to four batteries can operate in parallel. Four maximum towers contain 63.16 kWh usable by arithmetic, subject to the current compatibility and configuration limits.
Installation and compatibility
The enclosure is rated IP65 and permitted indoors or in a protected outdoor location. The ambient range is -20°C to 55°C, with charge or discharge power restricted at some temperatures.
Reserva is compatible with supported Fronius hybrid inverters except the older Symo Hybrid. Compatibility depends on the exact inverter model, software and permitted battery layout.
Backup and warranty
Reserva is the storage component, not an independent AC backup supply.
Reserva has a ten-year warranty. The full battery terms, commissioning record and serial-number position determine the actual cover. Warranty terms for a Fronius inverter do not replace the battery warranty.
Related entries
Brand
Reference type
Home battery model
Last reviewed
31 Jul 2026
Current status
Current in the manufacturer's UK range.