Excel Energy

Yes — three quotes is the UK standard for solar PV. Use Excel Energy's quote as one of those three. Compare not just price but warranty terms, MCS certification, and panel/inverter brands. Specs vary widely between installers.

Most reputable UK installers — including most London-area firms — offer a free desktop survey followed by a paid or no-cost roof inspection. Excel Energy's specific policy isn't published on EnergyRanked; ask when you make initial contact (their website excelenergy.co.uk is a useful starting point). A red flag would be any installer quoting without ever physically seeing the roof or property.

Review volume is limited at present. Ask Excel Energy for two or three customer references from their last 6 months of work; reputable installers will provide them. A small review count isn't disqualifying for a newer firm, but you should expect to see recent project photos.

Lead times for Greater London renewables installers swing seasonally — late spring and early summer are peak demand. Ask Excel Energy directly for current scheduling once you've got a written quote. Plan for 4–12 weeks from deposit to install on a typical residential project; complex roofs or DNO upgrades can extend that.

London gets enough annual sunlight for a typical 4 kW domestic system to produce roughly 3,200–3,800 kWh/year. Payback periods are typically 8–11 years at current electricity prices. Ask Excel Energy for site-specific yield modelling based on your roof orientation, pitch and shading.