More than 1.5 million UK homes now generate their own electricity via solar panels, making it increasingly common for buyers to encounter such installations. While panels can lower bills and improve sustainability, they also introduce extra paperwork and maintenance considerations that buyers must address before completing a purchase.
Critical factors include verifying the system's age, as panels typically last 25 years or more but lose efficiency over time. Inverters, which convert DC to AC power, need replacing every eight to 12 years, so a system over a decade old may require budget adjustment. Buyers should request recent generation reports to confirm performance.
Documentation is essential: the Microgeneration Certification Scheme (MCS) certificate, installation date, and any Feed-in Tariff (FiT) paperwork must be in order. Without these, mortgage lenders and insurers may object. Ownership matters—if panels are leased, a third party collects FiT payments, complicating sales and refinancing. Only owned panels allow tariff transfer to new owners.
Mortgage lenders generally view owned panels positively, especially if they improve the Energy Performance Certificate (EPC) rating. However, leased systems can raise red flags. Buyers should disclose all solar agreements early to avoid delays.
After moving in, a professional inspection of inverter, cabling, and panel output is recommended. Annual cleaning maintains efficiency. If the system is older, upgrading to a hybrid inverter or adding battery storage can boost self-consumption and grid independence.
