In the UK, solar panel grants like ECO4 offer up to £5,000 towards energy efficiency improvements for homes with EPC ratings D or lower, primarily benefiting low-income households, landlords, or owners receiving benefits. . Solar Together London is a group-buying programme that has enabled Londoners to install solar panels on their homes at an affordable price. This supports the Mayor's plans to make London a zero carbon city. What kind of home do you live in? Which? Trusted Traders solar subscription Whether you're closer to the Thames or the M25, if you're fortunate enough to live in London and. . If you're asking ' how much are solar panels?' the answer depends on your house and what size system you want, but expect to pay between £4,216 and £9,837. The application involves a quick survey, and installation typically takes. . In London, a standard solar panel system typically ranges from £6,000 to £12,000, depending on various factors, including system size, panel type, and specific installation requirements.