Solar panel systems come in different sizes that determine just how much electricity it’s able to generate. Simply put, the larger the system, the more electricity your home will benefit from. Find out just how much solar panels cost in the UK with the table below:
Solar System Size | Average Cost of Solar Panels |
1kW | £1840 |
2kW | £3680 |
3kW | £5520 |
4kW | £6040 |
To put these prices into context, the cost of solar panels for a 3 bedroom house will be around £5520 – £6040 as they’ll need to install a 3-4kW system to meet the higher electricity demands.
For most people though it’s not how much they are willing to pay for a solar PV system, but rather how much they can afford to pay. Now that systems are cheaper, solar panels have become more affordable, meaning more people can invest. Solar panels have become the most accessible of all renewable energy technologies.
Solar panel costs will depend on the size of the system you have installed, the installer fitting them, and the brand and quality of the panels themselves. For example, black monocrystalline silicon solar panels (the black ones) are slightly more expensive compared to polycrystalline silicon solar panels, which are characterised by their marbled blue appearance.
As we mentioned earlier, the price of solar panels has dropped pretty significantly. In fact, solar panel prices are 70% cheaper than in 2010. We’ve included a chart below to illustrate just how much prices have dropped for a typical 4kW system in the UK.

Figures from DECC and https://greenbusinesswatch.co.uk/uk-domestic-solar-panel-costs-and-returns-2019