Are solar panels worth it in the UK in 2026? Nine myths

I get asked whether solar panels are worth it in the UK in 2026 about four times a week, usually with a myth attached to it. Some of the myths are honest confusion. Some were invented by somebody trying to sell a system, and a couple were invented by somebody trying to sell you a heat pump instead. Fifteen years on roofs is long enough to have seen where each one comes from.

Here are the nine I hear most, and what is actually true. The kit and the prices are on the solar panels page if you want those first.

"They don't work in this country, it's too cloudy"

Cloud reduces output, it does not switch it off. Panels run on light, and diffuse light still gets to the cells.

Our design figure for South Yorkshire is 950 to 1,000 kWh per kWp a year. Ten LONGi Hi-MO X10 panels come to 4.8 kWp, so between 4,500 and 4,800 kWh a year. That is a real number off real roofs in Rotherham and Sheffield, not a Mediterranean brochure figure.

Heat is the thing people get backwards. Panels lose output as they get hot, so a cold bright day in March can outperform a hazy one in July.

"Do solar panels work in winter in the UK?"

They work, but they earn their keep between April and September. December here is a small fraction of June.

Nobody should sell you a system on the basis of its winter performance. What I would rather you understood is the consequence: a battery does very little for you in January, because there is hardly any surplus to store. If a salesman is justifying a large battery on winter savings, he is guessing.

Snow slides off a pitched array within a day. Frost does nothing.

"Panels will wreck your roof"

Not when they are fitted properly, and this one is worth being specific about because it is where cheap work shows.

Hooks are fixed through to the rafters, not to the tiles, and the tile goes back over the hook with the correct clearance. On a slate roof the fixing detail is different again. Done right, the roof is no less watertight than it was.

I have been up to fix other companies' work where the hook was sitting hard on the tile below and cracked it, or where a tile was ground away to make a hook fit. That is not solar damaging a roof. That is somebody rushing a job with the scaffold already booked for the next one.

Ask who does the roof work on your install. If the answer is vague, walk.

"You need planning permission"

Almost never on a house. Roof panels are permitted development in England as long as they do not stand more than 200 mm proud of the roof surface and the house is not listed.

Conservation areas add rules about walls and roof slopes fronting a highway, and listed buildings are a proper application. Flats and maisonettes have their own conditions. Everything else is a survey and a network notification, not a planning battle.

"They need cleaning all the time"

British rain does most of it on a pitched roof. What actually needs doing is checking, not scrubbing.

Panels near trees, under a flight path for gulls, or on a shallow pitch where water sits will benefit from an occasional clean. Everything else wants an eye kept on the monitoring app and a proper check every few years. Solar panel maintenance goes through what that involves.

Anyone knocking on your door offering an annual clean you did not ask for is selling a service you probably do not need.

"Why solar panels are not worth it in the UK any more"

This one usually arrives as a headline about export rates falling, and it misses where the money is.

The value is in the units you do not buy, not the ones you sell. A unit you use yourself is worth your full import rate. A unit you export is worth whatever your supplier pays under the Smart Export Guarantee, which is always less. Every supplier sets its own export rate and changes it, so compare them the week your MCS certificate lands.

So the question is not what export pays. It is how much of your generation you can use in the house. Move the washing, the dishwasher and the immersion into daylight hours and the sums change more than any tariff will.

"Do solar panels add value to a house in the UK?"

I am not going to put a number on it, because nobody credible can.

What I can tell you is what happens in practice. Buyers ask about them, they ask who fitted them, and they ask for the paperwork. A system with an MCS certificate, an electrical certificate and a transferable warranty is an asset in a sale. One with no documentation and an unknown installer is a question mark, and question marks come off the offer.

Keep the certificates somewhere you will find them.

"A battery always pays for itself"

It does not, and this is where I lose sales.

A battery earns money two ways: storing your own surplus for the evening, and filling overnight on a cheap tariff to carry you through the expensive part of the day. If the house is empty all day, that first one is worth a lot. If somebody is home using the power as it is made, there is less surplus to store and more panels would serve you better than more storage.

I have taken over jobs where somebody was sold 20 kWh who would have been comfortable with 5. Ours start with a 5.12 kWh battery for a reason.

"All quotes are the same system, so take the cheapest"

They are not, and the differences are hidden in the same three places every time.

Scaffold, which is often left off. The network application, because sizing a system down to dodge a G99 approval is a shortcut, not a saving. And the panel and inverter, because a quote that will not name the kit is a quote that expects to substitute it.

I saw a twelve panel quote recently that had been cut about to stay inside a G98 notification. The customer had been filled up with nonsense and was rightly uncomfortable. Ask for the make and model of every item, in writing, before you sign anything.

So are solar panels worth it in the UK in 2026?

For most houses, yes. For a north-facing roof, no. If you are moving within two years, probably not. If the roof needs re-tiling inside five years, do the roof first and the panels after.

I would rather say that on the phone than fit something you regret.

Solar panel cost in Yorkshire has the price ladder, and how solar panels work explains where the electricity actually goes.

If you want a straight answer about your own roof, Get a quote with your postcode, or ring 01709 278248 and ask. If the answer is no, we will say so.