Be Wise › Solar Wise guides › Solar FAQs › Costs, savings and payback
What solar panels and home batteries cost in the UK, and how to work out how long they take to pay for themselves.
New to this topic? Start with our guide: Costs, savings and payback.
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The Energy Saving Trust puts the average home solar system at around £7,600 for about 4.5 kWp, roughly 12 panels. Installation in a home currently has 0% VAT, under the relief scheduled to run until 31 March 2027. Prices vary with roof access, scaffolding and the equipment chosen, so compare at least three quotes.
Sources: Energy Saving Trust: Solar panels · GOV.UK: VAT on energy-saving materials and heating equipment (Notice 708/6)
The Energy Saving Trust says battery storage tends to cost around £5,000 to £8,000. Its battery guide gives a wider range of £1,500 to £10,000 and around £4,600 for a 5 kWh system.
Sources: Energy Saving Trust: Solar panels · Energy Saving Trust: Battery storage
It depends on the cost, how much the panels generate, how much of the electricity you use yourself and what you are paid for exports. The Energy Saving Trust publishes payback estimates for different parts of the UK and for people who are home all day, half the day or out. Divide the cost by your realistic yearly saving, and allow for the inverter, which usually needs replacing after around 12 years.
Sources: Energy Saving Trust: Solar panels
The Energy Saving Trust says solar panels should last 25 years or more, and that an inverter usually needs replacing after around 12 years.
Sources: Energy Saving Trust: Solar panels
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Open Be Solar WiseAll FAQsReviewed 2026-10-02. General information, not legal, electrical or financial advice. Confirm current rules before you buy or connect anything.
