How do I choose a solar installer?
Choose an MCS-certified installer with verifiable reviews, a clear itemised quote and solid warranties on panels, inverter and workmanship. Get at least three quotes, check they handle MCS certification and DNO notification, and avoid pressure-selling. The cheapest quote is rarely the best value over a 25-year system life.
Questions to ask every installer
- Are you MCS-certified, and what is your registration number?
- Is the quote fully itemised, including scaffolding and certification?
- What panel, inverter and battery brands, and what warranties?
- Who handles the DNO notification and MCS paperwork?
- Can you share recent local references or verified reviews?
- What is your aftercare and warranty claim process?
Red flags to avoid
Be wary of high-pressure sales, today-only discounts, quotes far below the typical £5,000 to £12,000 range, and reluctance to itemise. A trustworthy installer gives you time, a written survey-based quote and clear answers. SunSum connects you with a single named MCS installer so you are not chased by several firms.
Frequently asked questions
- How many solar quotes should I get?
- At least three, compared like-for-like on specification, warranties and total installed price.
- Should I choose the cheapest quote?
- Not automatically. Installer quality, inverter and warranties matter more than a small price difference over the system's life.
Related questions
Indicative estimates based on UK average data. Last updated 27 May 2026.