Balcony Solar Savings Calculator
Plug-in solar is legal in the UK up to 800W of output — but your panels can be bigger than that. Set your panel size and see what a kit generates, what the 800W cap wastes, and what a battery would recover.
Inverter output is fixed at 800W — the UK legal limit for plug-in kits. Panels can legally exceed it; that's what the battery captures.
Panels generate
816 kWh/yr
Lost to 800W cap
41 kWh/yr
Annual saving
£109
Payback
5.5 yrs
Little clipping at this panel size — a battery would mainly help by shifting daytime generation to evening use.
Estimate only — real output depends on your exact balcony, shading and usage pattern.