The most common solar installation is a 3.5 kilowatt-peak (kWp) system. According to the Energy Saving Trust, the average 3.5kW solar panel system would typically require around 10 solar panels (at 350 W each) and cost around £7,000. Estimating the cost of solar panels comes with a remarkable amount of math questions.
The average cost of a 350-watt solar panel in the UK is between £150-£300. The most common solar installation is a 3.5 kilowatt-peak (kWp) system. According to the Energy Saving Trust, the average 3.5kW solar panel system would typically require around 10 solar panels (at 350 W each) and cost around £7,000.
The average cost of a 3kWp solar panel system for a typical property with two or three bedrooms is about £9,000, including installation. This jumps up to around £11,000 if you’re adding a 5kWh battery. This is a great time to get a solar & battery system, as there’s currently 0% VAT on both panels and batteries.
A 4kW solar panel system costs around £9,500 to buy and install. If you want to include a battery in the installation, this will add around £2,000 to the price, for an overall cost of £11,500.
You can definitely get an off-grid 4kW solar panel system installed, and it can supply a large chunk of the electricity you need. As you’re not able to export excess energy to the grid, you’ll need a large battery to hold onto as much electricity as possible.
Of course it’s not sunny all the time, and the output of PV panels will drop a little under cloud or on winter days, when the sun is weaker. In the UK you can expect one kilowatt of panels to generate between 800 and 1000 units (kilowatt-hours, kWh) of electricity per year.