Thinking about solar panels? Estimate how much you could save a year and how long the system might take to pay for itself, based on the latest UK electricity prices.
Est. system cost,
Saving / year,
Payback,
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Estimates only. Assumes about 900 kWh generated per kWp a year and an installed cost of roughly £1,700 per kWp (Energy Saving Trust puts a typical 3.5 kWp system near £6,100). Electricity price defaults to the Ofgem cap for 1 Oct–31 Dec 2026 (26.32p/kWh); SEG rates vary by supplier (around 12–15p). Real output depends on roof direction, shading and location. Sources: Energy Saving Trust; Ofgem. Last updated 28 August 2026.