Solar Panels in the TW9 Postcode Area
The TW9 postcode area covers Richmond and surrounding areas in Greater London. A typical 4kWp solar panel system here generates around 3,840 kWh per year, saving an estimated £1,075/yr on electricity bills and covering roughly 101% of average household electricity usage.
Solar Performance in TW9
About Solar in TW9, Richmond
Homeowners in the TW9 postcode area are eligible for 0% VAT on solar panel installations, making 2026 an excellent time to invest in solar energy. With 960 kWh generated per kWp of installed capacity, the TW9 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 Greater London qualify for SEG payments from energy suppliers.
Greater London generates 960 kWh per kWp, about 4% above the UK average of 920 kWh/kWp. The capital benefits from a slight urban heat island effect and southeast England's excellent sunshine, and with over 9 million residents, London has the highest absolute number of solar installations of any UK area.