Solar Panels in London

London might not be the sunniest city in Europe, but it receives around 1,000 kWh of solar irradiance per square metre each year — enough to make solar panels a genuinely worthwhile investment for most households in the capital. Modern panels generate electricity from daylight, not just direct sunshine, and with 0% VAT on solar confirmed until March 2027, 2026 is a strong year to act.

A typical 4kW solar panel system in London costs between £7,000 and £9,500 installed — slightly above the UK average due to higher London labour rates, the complexity of working on Victorian and Edwardian rooftops, and scaffolding requirements in built-up areas. South-facing roofs generate the best output, but east–west roof splits are increasingly popular with London installers and work well for many terrace configurations.

A 4kWp system in London generates around 4,080 kWh per year and typically saves £600–£900 annually on electricity, depending on daytime self-consumption. Adding a 5–7kWh battery increases self-consumption significantly, saving an additional £200–£400 per year and reducing evening reliance on the grid almost entirely.

Greater London has over 200 MCS-certified solar installers — more than any other UK region. MCS certification is required for Smart Export Guarantee registration and most grant schemes, so always check your installer’s credentials before signing. With strong local competition, it’s realistic to collect three to four competitive quotes within a week — and comparing them carefully can save you hundreds on the final price.

For most London homes — whether a Victorian terrace in South London, a 1970s semi in the suburbs, or a newer build in East London — solar panels offer a payback period of 8–10 years and a long tail of essentially free electricity production for the life of the system.

At SolarBriton, we’ve done the research so you can find the right London solar installer with confidence.