Savings depend on system size, tariff and — most of all — how much generation you use rather than export. These broad figures use the 1 July to 30 September 2026 price cap of 26.11p/kWh.
Typical figures for a 5 kW system:
- Generation — around 4,000 kWh per year in Central Scotland
- Panels only — roughly £500–£850 a year, assuming 35–50% direct self-consumption
- Panels plus battery — roughly £850–£1,100 a year, assuming a suitably sized battery raises self-consumption to around 75–85%
- Smart Export Guarantee — exported electricity is paid, but tariff choice materially affects the result
The upper end assumes a strong fit between generation, battery capacity and household usage; it is not the likely result for every home. Working from home, an EV, an electric shower or a heat pump can raise self-consumption. A household that is out all day and exports most generation sits nearer the lower end.
We will not present a household-specific figure until we have looked at the roof, annual consumption and tariff. The free savings report is built on your numbers, not a best-case headline.
