Do solar panels pay for themselves in the UK?
Usually, yes — over time. A typical home solar PV system costs around £7,000 to install and saves roughly £400–£700 a year on electricity at today's prices, so it pays back in about 10–15 years against a panel lifespan of 25 years or more. Adding a battery raises both the upfront cost and how much of your own generation you use, which lifts the saving but lengthens the payback.
What changes the payback
- Roof orientation and pitch: a south-facing, unshaded roof generates the most and pays back fastest; east–west roofs still work but generate less.
- Self-consumption: the more generation you use directly (rather than export), the more you save, because you avoid buying at ~25p/kWh and only earn ~5–15p/kWh for export.
- A battery stores daytime generation for evening use, pushing self-consumption from ~50% towards 80%+ — more saving, but £2,000–£5,000 more upfront.
- Export tariff (SEG): you're paid for the electricity you send back to the grid, so a better Smart Export Guarantee rate shortens the payback.
Other green upgrades and their grants
- Air-source heat pump: £7,500–£13,000 to install, but the government's Boiler Upgrade Scheme grant of £7,500 covers most of it; running costs are often similar to gas in a well-insulated home.
- Insulation: loft and cavity-wall insulation are among the cheapest upgrades and can save hundreds of pounds a year, often paying back in just a few years.
- These upgrades also lift the property's EPC rating, which can support its value and lower its running costs.
True Bricks' Eco Hub models solar, heat pumps and insulation against a specific property — including the grants — and shows how each one moves that home's total cost of ownership.
Frequently asked
Do solar panels pay for themselves?
Usually yes, in about 10–15 years for a typical UK home — a roughly £7,000 system saving £400–£700 a year. After payback the electricity it generates is effectively free for the rest of the panels' 25-year-plus life.
How much do solar panels cost in the UK?
Around £7,000 for a typical 4kWp system without a battery. Adding a battery for evening use typically costs £2,000–£5,000 more.
Are heat pumps worth it in the UK?
An air-source heat pump costs £7,500–£13,000 to install, but the £7,500 Boiler Upgrade Scheme grant covers most of that. In a well-insulated home, running costs are often comparable to gas while cutting carbon sharply.
What grants are available for solar and heat pumps?
Heat pumps qualify for the £7,500 Boiler Upgrade Scheme. Lower-income or lower-EPC households may also be eligible for ECO4 and the Great British Insulation Scheme. Solar PV itself is zero-rated for VAT until 2027.
Want exact figures for a specific property? Analyse any UK address →
Figures use True Bricks' standard cost model with UK rates as of the 2025/26 year — mortgage maths, the English average Band D council tax, Ofgem energy unit rates, current SDLT bands, and rebuild-based insurance and age-based maintenance. Estimates, not financial advice. Last reviewed June 2026.