Replace the Battery, Keep the System
Systems installed between 2018 and 2021 are hitting end of life on their first battery bank. The inverter, the mounting and the grid connection are all still good. Replacing the battery is a fraction of the cost of a new system — and a fraction of the paperwork.
Why Retrofit Instead of Replace
| Factor | Full new system | Battery retrofit |
|---|---|---|
| Cost | 100% | 35–55% |
| Grid-code re-certification | Required in most EU markets | Not triggered |
| Installation time | 2–3 days | 4–8 hours |
| Inverter and wiring | Replaced | Retained |
| Feed-in tariff status | May need re-application | Unchanged |
The Compliance Point That Matters Most
Replacing a battery does not change the grid connection, so no new grid-code certification is triggered. This is the fastest legal route into the German, Italian and UK retrofit market.
This is not a loophole — it is how the regulations are written. The grid connection is certified as an assembly of inverter plus protection settings. Swap the battery for one that presents the same voltage window and communication protocol and the certified assembly is unchanged. Swap the inverter and you start again.
What We Supply
| Product | Voltage | Capacity | Fits |
|---|---|---|---|
| ATHENA B | 51.2 V | 15.36 / 17.152 kWh | 48 V hybrid inverters |
| ATHENA C | 51.2 V | 30.72 / 34.3 kWh | 48 V hybrid inverters, larger banks |
| SCRA-R HV | 200–820 V | 20–256 kWh (modular) | High-voltage hybrid inverters |
| SCLFP | 12.8 / 25.6 V | 100–300 Ah | Lead-acid replacement in existing cabinets |
Compatibility Process
- Send us the inverter make, model and firmware version, plus a photo of the battery label
- We confirm the protocol (CAN or RS485), the voltage window and the charge profile
- We send a compatibility statement in writing before the order is accepted
- Battery ships pre-configured with the matching protocol
- If it does not communicate on arrival, we support it remotely until it does
We do not claim universal compatibility. Some inverters use proprietary protocols and some are simply not worth retrofitting. We will tell you which group yours is in.
Send Us Your Inverter Details
Make, model, firmware version and a photo of the existing battery label. We will confirm compatibility in writing.