Solar Panels in the SL1 Postcode Area
The SL1 postcode area covers Slough and surrounding areas in Berkshire. A typical 4kWp solar panel system here generates around 3,896 kWh per year, saving an estimated £1,091/yr on electricity bills and covering roughly 103% of average household electricity usage.
Solar Performance in SL1
About Solar in SL1, Slough
Homeowners in the SL1 postcode area are eligible for 0% VAT on solar panel installations, making 2026 an excellent time to invest in solar energy. With 974 kWh generated per kWp of installed capacity, the SL1 area benefits from above-average solar irradiance for the UK.
Through the Smart Export Guarantee (SEG), you can also earn money by exporting surplus electricity back to the grid. Most MCS-certified installations in Berkshire qualify for SEG payments from energy suppliers.
Berkshire in the South East generates 970 kWh per kWp, about 5% above the UK average of 920 kWh/kWp. Home to the royal town of Windsor and the university city of Reading, Berkshire benefits from the warm Thames Valley microclimate with good sunshine hours and moderate rainfall.