Savings vary with your system size, energy-use pattern and whether you add battery storage. These are broad ranges based on the 1 July to 30 September 2026 Ofgem price cap of 26.11p/kWh.
Typical figures for a 5 kW system:
- Panels only — roughly £500–£850 a year. Without a battery you will typically use 35–50% of what you generate as it is produced, and the rest is exported.
- Panels plus battery — roughly £850–£1,100 a year. This assumes a suitably sized battery that raises self-consumption to around 75–85%.
- Smart Export Guarantee — exported electricity is paid, but the tariff you choose can materially change the result.
What affects your savings:
- System size — a larger array generates more electricity
- Roof orientation and shading — south-facing is ideal, but east/west split roofs can also work well
- Your energy habits — working from home, an EV or an electric shower can raise self-consumption
- Electricity tariff — the higher your import rate, the more each self-consumed unit is worth
The upper end is not an average for every household, and your standing charge does not go away. We provide a free, no-obligation savings report based on your roof, usage and tariff before you commit to anything.
