What is the cheapest way to buy solar panels?
The cheapest way to buy solar panels is to pay upfront (avoiding interest), get at least three quotes from MCS-certified installers, size the system to your actual usage rather than oversizing, and benefit from the current 0% VAT. Many homeowners also fit panels first and add a battery later to spread the cost.
How to keep the cost down
- Pay upfront if you can, to avoid finance interest.
- Get three or more MCS quotes and compare like-for-like specifications.
- Right-size the system: more panels than you can use just exports at the lower rate.
- Take advantage of 0% VAT on residential solar and batteries.
- Consider adding the battery later once you see your actual usage pattern.
What not to cut
Avoid choosing on price alone. A reputable MCS installer, a quality inverter with a solid warranty and proper roof fixings matter more over 25 years than saving a few hundred pounds upfront. Beware quotes far below the typical £5,000 to £12,000 range, which can signal corner-cutting.
Frequently asked questions
- Are cheap solar panels worth it?
- Budget panels can be fine, but the inverter, installer quality and warranties matter most. The cheapest quote is rarely the best value over the system's life.
- Does buying in winter make solar cheaper?
- Installers are sometimes quieter in winter, so you may find better availability or deals, though prices are fairly stable year-round.
Related questions
Indicative estimates based on UK average data. Last updated 27 May 2026.