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Are solar panels worth it in the UK?

Solar can absolutely pay off in the UK — but there’s no single yes or no, because it depends on your roof, how much power you use during daylight, and what you’re paid to export the rest. Here’s how to think it through, with no one trying to sell you a system.

• The two ways solar saves you money. First, self-use: any generation you use in the moment is electricity you don’t buy from the grid — usually the bigger win. Second, export: what you generate but don’t use can be sold back through a Smart Export Guarantee (SEG) tariff. Self-use almost always beats export, penny for penny.
• What actually drives the payback. Your roof (which way it faces, its pitch, shading), the system size and its cost, how much of your use happens in daylight, and your SEG export rate. Two identical roofs can have very different paybacks purely because of when the households use power.
• Who it suits best. Homes that use a good chunk of electricity during the day — someone home in the daytime, an EV charged from the panels, a heat pump — get the most, because they self-use more of what they generate. Add a battery and you can store daytime generation for the evening peak (at extra cost).
• The caveats worth knowing. It’s a real upfront cost with a payback measured in years, not months, and the sums depend on assumptions that vary a lot between homes. Be wary of any quote that promises a fixed saving without asking how you use power. Cheaper levers to try first →

The only way to know if solar is worth it for your home is to model it against your real usage and your export rate — not a typical home. Joulely gives a clearly-labelled, illustrative solar estimate on your connected page, built on your own generation, usage and SEG rate, so the numbers are yours and nothing’s overclaimed. See which tariff suits your usage →