How Much Would 12 Solar Panels Cost?

Your annual electricity consumption, roof area, panel wattage, shading and budget should all be considered. A household with high electricity use and plenty of suitable roof space may have good reason to install more. Another home may get what it needs from fewer panels.

The right number is the one that fits the property and produces useful electricity without paying for capacity you are unlikely to use.

Final Cost: What Should You Expect?

For a broad UK benchmark, Energy Saving Trust currently lists around £7,600 for an average domestic solar installation. A typical 4.5kWp system uses around 12 panels, but your actual price can move away from that figure because of panel output, roof conditions, access, equipment and additional work.

So, rather than asking an installer for the price of 12 panels alone, ask for the cost of the complete system.

Get several itemised quotations, compare the equipment and check what is included. Look at expected generation as well as the upfront cost. If you are considering a battery, ask for its price separately so you can see what you are actually paying for the added storage.

That approach gives you a much clearer idea of whether a 12-panel system suits your home and your electricity use.