How solar saves you money
You save in two ways: by using the electricity your panels generate instead of buying it, and by being paid for what you export under a Smart Export Guarantee (SEG) tariff. Larger suppliers must offer a SEG tariff, but rates vary a lot between suppliers, so shop around for the export tariff separately from your import tariff.
Sources: Ofgem: Smart Export Guarantee.
What to check in a solar quote
- The installer and products are MCS certified (needed for SEG payments).
- System size in kWp, panel and inverter make, and warranties.
- An estimate of annual generation based on your roof’s direction, pitch and shading.
- Scaffolding, any bird-proofing, and the DNO grid notification are included.
- Get at least three quotes. Be wary of doorstep or high-pressure sales.
Sources: MCS (Microgeneration Certification Scheme).
Is a battery worth it?
A battery stores daytime solar for the evening, and can charge from the grid on a cheap overnight time-of-use tariff. Whether it pays back depends on your usage pattern, tariff and battery price. The government plans low-interest Warm Homes Plan loans for solar panels and batteries.
Last updated: 15 October 2026
