The cost of solar panels is based on numerous factors, including the size of your roof, your electricity usage, whether you want to include the cost of a solar battery, and the number of solar panels you choose. E. * Please note: These prices are based on Microgeneration Certification Scheme (MCS) cost data (March 2024), the average price of electricity (April-June 2024), and Ofgem's latest ty. There are three key factors that affect the price of solar panels: 1. Panel type: Some panel types, such as monocrystalline solar panels, cost more than others. This is because they us. The cost of your solar panel installation will ultimately come down to how much your installer charges. Each supplier will likely be different, so reach out to several to make a more info. Solar panel and battery installation can be pricey, but the good news is that there are government funding schemesand incentives to help reduce the cost. Here are the main ones: 1.