What to look for
A legitimate solar panel cleaner should carry public liability insurance of at least £1 million and be comfortable providing evidence of this before booking. Working at height requires additional insurance coverage — ask specifically about this.
Look for cleaners who use purified (deionised) water and soft-bristle brushes or water-fed poles. Cleaners offering to use tap water with a standard hose will leave mineral deposits on your panels and likely damage long-term performance.
Verified reviews from previous customers are the most reliable signal of quality. Reviews on a neutral third-party platform — rather than testimonials on the company's own website — carry more weight.
Questions to ask before booking
How do you access the panels — from ladders or a water-fed pole system from the ground? Ground-based systems are lower risk for both the operative and your roof tiles.
Do you use purified water? What is your cleaning method?
Are you insured for working at height? Can you send me a copy of your insurance certificate?
Will you check the panels for visible damage or faults as part of the visit?
Do you have reviews I can read? Can you provide references from local customers?
Red flags to avoid
No verifiable insurance or reluctance to provide documentation.
Quotes significantly below the market rate (£4–£8 per panel) — this often indicates corners being cut on equipment, insurance, or time.
Pressure to book immediately or pay cash upfront.
No fixed business address or verifiable online presence.
Offering to clean other parts of your roof (moss removal, gutter cleaning) as an upsell before even seeing your installation.
The fastest way to find a vetted cleaner
A specialist directory pre-screens businesses for verified reviews and claimed listings — meaning the business has confirmed it is active and legitimate. Generic directories list anyone who pays for a listing, with no quality filter.
FindSolarCleaner.co.uk is the UK's only directory dedicated to solar panel cleaning. Enter your postcode to find active, reviewed cleaners within your area, read verified customer reviews, and send an enquiry directly.