Why Get Solar in 2026? Prices, Payback and What's Changed

The short version

Solar in 2026 is a better deal than it has ever been, for one simple reason: the cost of panels has kept falling while the cost of grid electricity hasn’t. A system that would have taken a decade to pay for itself in 2020 now typically pays back in 5–8 years — and then generates essentially free power for another two decades.

What’s actually changed

Panel prices. Global manufacturing capacity has driven hardware prices down year after year. High-efficiency panels that were premium products three years ago are now standard fit.

Zero VAT. Domestic solar installations remain zero-rated for VAT, taking a meaningful chunk off the installed price.

Electricity prices. The average unit rate sits around 24p — roughly double what it was in 2021 — and none of the market forecasts show a return to old prices. Every year you wait is a year paying full rate.

Batteries got cheap enough to matter. Stackable systems from 5 to 60 kWh mean you can size storage to your actual usage. Pairing a battery with panels lifts self-consumption from about 35% to over 75%, which is what pushes payback towards the fast end of the range.

The numbers for a typical home

A 4kWp system in England generates around 3,400 kWh a year. Depending on how much you self-consume, that’s worth £600–£1,100 a year off your bills, plus Smart Export Guarantee payments of 5p–15p for every unit you export. Installation takes 1–2 days.

What hasn’t changed

Solar still isn’t magic. A shaded roof is still a shaded roof, a badly sized system is still a bad investment, and an installer who quotes without surveying is still guessing with your money. The route to the good outcome in 2026 is the same as it always was: a proper survey, honest generation modelling, and MCS certified installation — which is also what unlocks your export payments.

Bottom line

If you own your home and pay an electricity bill, 2026 is the strongest the solar case has been. Get a real survey done, insist on seeing the assumptions behind the payback figure, and make sure your installer is MCS accredited.