Solar Panel Costs in London & the South East
The cost of a solar panel system depends on property size, electricity usage, and whether you include a battery. However, using data direct from MCS (our accreditation body) we can see
The average cost of solar panels in the UK, including installation and a battery, ranges between £4,850 and £13,000 depending on the size of your household. Based on our research, as of December 2025, for a 3-bedroom house in the UK: Solar panels cost around £9,800 for a 4.5kW system, including installation and a 3kW storage battery.
Using FMB's online quote form is a great place to start: it provides you with up to 5 quotes from our trusted solar panel installers, allowing you to compare the costs of each. What affects the cost of solar panels in the UK? Finding the best price for solar panels requires some research.
In fact, between September 2024 and 2025, the average cost per kilowatt (kW) for a solar panel system in the UK dropped by 2.4 per cent. Combine that with the falling costs of solar battery storage, you'll find that now is a great time to get solar panels in the UK.
Finding the cheapest price for solar panels involves research, comparison and consideration of various factors, such as upfront costs, installation costs, and long-term maintenance costs.
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