Keep your own power.
Instead of exporting spare solar at a lower rate and buying electricity back later, a battery lets more of your generation work inside the home.
Battery storage
Already have solar? Your battery is the upgrade that pays twice.
A battery retrofit keeps the power your panels currently give away, then can earn again by trading flexibility with the grid. Most straightforward retrofits are a one-day installation.
Typical import assumption
26p/kWh
Off-peak spread model
12p/kWh
Modelled battery earnings
£120-£250/yr
Sized from usage
Extra capacity only helps if it cycles often enough to pay for itself.
Retrofit checked
Inverter, meter setup, tariff and space are checked before quote.
Supplier choice kept
The earning route is designed around supplier-agnostic systems.
The two ways it pays
Store more of your own power, then earn for flexibility.
Use cheap-rate electricity better.
On a suitable tariff, a battery can charge when power is cheaper and discharge when your home would otherwise import at the peak rate.
Get paid for flexibility.
Connected batteries can support the grid in the background. Worpra models those earnings separately so the bill saving and grid income stay clear.
FIT-era systems
We check the paperwork before promising the answer.
Older Feed-in Tariff systems need careful handling. The survey checks your generation meter, export arrangement, inverter setup and scheme paperwork before any recommendation.
If anything about your existing scheme changes the maths, we will say so plainly before quote.
| Existing inverter | Checked |
|---|---|
| Meter setup | Checked |
| Usage pattern | Measured |
| Quote basis | Itemised |
Sizing
Bigger is not always better.
Past a point, extra kWh sits idle too often to pay for itself. Worpra sizes from your actual usage pattern, tariff and solar generation rather than defaulting to the biggest battery that fits.
250
Annual arbitrage cycles used in the current calculator assumptions.
FAQ
Battery retrofit questions
Can a battery be added to an existing solar system?
Usually, yes. The right approach depends on your inverter, meter setup, tariff and available space.
Will you just sell me the biggest battery?
No. Extra capacity only helps if it cycles often enough to pay for itself, so Worpra sizes from usage rather than upsell.
Where can the battery go?
Common locations include a garage, utility space or suitable outside wall. The survey checks access, ventilation, clearances and cable routes.
Start here
See what a battery would actually do.
Start with the calculator, then we can survey the existing system properly.