Solar panel cost and payback in the UK

What a domestic solar PV system typically costs, how much it can cut an electricity bill, and what drives the payback period.

Solar photovoltaic (PV) panels generate electricity from daylight. A typical home system is around 3.5 to 4 kWp, using the roof space of a normal house.

The saving comes from using your own generation instead of buying from the grid, plus payment for exported electricity under the Smart Export Guarantee.

Typical UK cost

Cost ranges are indicative and attributed to Energy Saving Trust. Prices vary by property, region and installer – always get quotes and check the official source.

Typical saving

The Energy Saving Trust estimates a typical home solar system can save in the region of £100 to £500 a year on electricity, depending on system size, roof orientation and how much power is used during the day.

Saving figures are indicative and attributed to Energy Saving Trust. Check the official source.

Payback

Payback is typically a number of years and is shorter for south-facing roofs and homes that use more electricity during daylight hours.

What affects the price

• Roof orientation, pitch and shading.
• System size and whether a battery is added.
• How much of the generation is used at home versus exported.
• The export tariff offered under the Smart Export Guarantee.