Solar Panels in the GU21 Postcode Area
The GU21 postcode area covers Woking and surrounding areas in Surrey. 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 GU21
About Solar in GU21, Woking
Homeowners in the GU21 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 GU21 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 Surrey qualify for SEG payments from energy suppliers.
Surrey in the South East generates 975 kWh per kWp, about 6% above the UK average of 920 kWh/kWp. One of the UK's most affluent regions, Surrey's proximity to London combined with its excellent sunshine and the Surrey Hills countryside has driven very high solar adoption rates among homeowners.