Do solar panels still pay back without a battery?

Yes — typically 12–15 years on cash for a 4 kWp system at a basic 6p export rate, or under 9 years on a market-leading export tariff. Batteries add saving but not always speed: they cost more than the extra saving they generate over the first decade unless you also arbitrage a cheap overnight tariff.

Will solar panel prices keep falling?

Hardware costs have generally continued to fall. But labour, scaffolding and admin (DNO/MCS fees) have stayed flat or risen with inflation, so total install prices have fallen more slowly than panel costs alone.

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 9–13 years on cash — comfortably inside the 25-year panel warranty. Land at the fast end of that by getting onto a market-leading export tariff; assume the slow end if you stay on a basic 4–7p SEG. 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 continued to fall, the best import-tied SEG export tariffs now pay as much as 25p/kWh, the 0% VAT runs to March 2027, and battery prices have continued to fall as the LFP cell market has matured.

The maths in one paragraph

Take a 4 kWp install on a south-facing roof at around £7,800 (in line with DESNZ/MCS 2025/26 domestic cost data of roughly £1,955/kW for a small system). It generates ~3,520 kWh/year. If you self-consume 45% (typical without a battery) at 26p/kWh that's about £412/year saved on imports; the other 55% exports at a basic 6p SEG rate, worth about £116. Total annual benefit around £528 — a payback of roughly 15 years. Switch that export to a market-leading 25p tariff and the benefit rises to around £896/year, pulling payback down to under 9 years. Adding a battery that lifts self-consumption to 75% improves the economics further, but the battery only pays for itself over many years unless you also use it to store cheap overnight electricity.

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 will only recoup part of the install cost in sale price, not all of it); and homes on 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 12–15 years on cash for a 4 kWp system at a basic 6p export rate, or under 9 years on a market-leading export tariff. Batteries add saving but not always speed: they cost more than the extra saving they generate over the first decade unless you also arbitrage a cheap overnight tariff.
Will solar panel prices keep falling?: Hardware costs have generally continued to fall. But labour, scaffolding and admin (DNO/MCS fees) have stayed flat or risen with inflation, so total install prices have fallen more slowly than panel costs alone.
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.