Do solar panels still pay back without a battery?

Yes — typically 8–11 years on cash for a 4 kWp system. Batteries shorten payback if you're home during the day; otherwise SEG export already monetises surplus generation.

Will solar panel prices keep falling?

Hardware yes, slowly — roughly 5–8% per year on cells. But labour, scaffolding and admin (DNO/MCS fees) have stayed flat or risen with inflation, so total install prices are dropping more like 3–5%/year.

Does solar add value to my home?

RICS data points to a 2–4% uplift on resale for owned (not financed) systems, plus better EPC rating and access to green mortgages. Leased panels can have the opposite effect — buyers' solicitors flag them as a charge on the title.

Are solar panels worth it in 2026?

When solar pays back, when it doesn't, and the four 2026 changes that have shifted the maths in homeowners' favour.

The short answer

For most owner-occupied UK homes with a south-, south-east- or south-west-facing roof, solar panels in 2026 pay back in 7–11 years on cash — comfortably inside the 25-year panel warranty. The two cases where they don't: heavy shading, or homes that will be sold inside five years.

What's changed in 2026: panel prices have fallen another 8% year-on-year, SEG export rates have crept up to 15p/kWh on the best tariffs, the 0% VAT runs to March 2027, and battery prices have dropped roughly 12% as the LFP cell market has matured.

The maths in one paragraph

Take a 4 kWp install on a south-facing roof at £6,800. It generates ~3,600 kWh/year. If you self-consume 40% (typical without a battery) at 27p/kWh that's £389/year saved on imports; the other 60% exports at 15p SEG, worth £324. Total annual benefit £713 — a 9.5-year cash payback. With a 5 kWh battery added (extra £3,500, lifting self-consumption to 70%) the benefit climbs to £950/year and total payback shortens to 11 years on the combined £10,300 bundle.

When solar isn't worth it

Three honest no-go cases: chimney or tree shading on more than 30% of the roof for more than half the day; a planned house move inside 5 years (you'll likely recoup ~70% of the install cost in sale price, not 100%); and homes on Economy 7 or fixed sub-20p tariffs that don't move much when generation arrives.

Flat-roof flats and listed buildings can also tip negative once the extra ballast/consent costs go in — get a survey before committing.

The non-bill wins

Two effects rarely modelled: a 2–4% uplift in property value at sale (RICS 2024 working paper), and EPC-rating shifts that improve mortgage rates on green-mortgage products. For a £350,000 home, the uplift alone often clears the install cost on resale.

Frequently asked questions

Do solar panels still pay back without a battery?: Yes — typically 8–11 years on cash for a 4 kWp system. Batteries shorten payback if you're home during the day; otherwise SEG export already monetises surplus generation.
Will solar panel prices keep falling?: Hardware yes, slowly — roughly 5–8% per year on cells. But labour, scaffolding and admin (DNO/MCS fees) have stayed flat or risen with inflation, so total install prices are dropping more like 3–5%/year.
Does solar add value to my home?: RICS data points to a 2–4% uplift on resale for owned (not financed) systems, plus better EPC rating and access to green mortgages. Leased panels can have the opposite effect — buyers' solicitors flag them as a charge on the title.