
Solis FlexHome 5kWh 51.2V Stackable Low Voltage LiFePO4 Battery Module
The Solis FlexHome 5kWh module in its low voltage form is the stackable element of the SolisStorage range for the home. It banks what the solar array produces while the sun is up and gives it back when it is needed, lifting self-consumption and keeping backup loads running if the grid fails.
The module needs the low voltage BMS SOL-SBAT-BMS-LV-ST-OD, ordered separately: a complete system is 1 BMS and 1 battery module, so it starts at 5kWh and climbs in 5kWh steps to 40kWh, with a maximum of 4 units in parallel. That suits an installation that starts small and has to grow without re-doing the wiring.
The cells are lithium iron phosphate and the datasheet states a depth of discharge of 100%, with more than 6000 cycles — roughly ten years of service. For the single module Solis gives a recommended charge and discharge current of 50A, about 2560W at the nominal 51.2V, and a maximum discharge current of 100A, about 5120W; in a taller tower those figures rise with the module count. The BMS watches the voltage and temperature of every cell. The module weighs 76kg, so handling calls for two people or a lifting aid. Installation and commissioning must be carried out by qualified personnel.
Key strengths
Technical specifications
| Feature | Value |
|---|---|
| Product code | SOL-SBAT-R5K-L-ST-OD |
| Manufacturer | Solis |
| Series | FlexHome L (SolisStorage) |
| Type | Stackable low voltage battery module |
| Chemistry | LiFePO4 (lithium iron phosphate) |
| Nominal energy | 5kWh (5000Wh) |
| Nominal voltage | 51.2V (low voltage) |
| Operating voltage range | 44.8-57.6V |
| Rated cell capacity | 100Ah |
| Depth of discharge (DoD) | 100% |
| Recommended charge and discharge current | 50A (about 2560W at 51.2V) |
| Maximum discharge current | 100A (about 5120W at 51.2V) |
| Cycle life | Over 6000 (about 10 years) |
| Minimum configuration | 1 low voltage BMS plus 1 module (5kWh) |
| System capacity | 5 to 40kWh, in 5kWh steps |
| Units in parallel | Up to 4 |
| BMS required | SOL-SBAT-BMS-LV-ST-OD (not included) |
| Ingress protection | IP66, C5M anti-corrosion class |
| Dimensions (W × H × D) | 800 × 494 × 285mm |
| Weight | 76kg |
| Source of the technical data | Figures declared by Solis, FlexHome-(5-40)kWh-L V1.2 datasheet; power values are derived from the declared currents at nominal voltage |