Whilst solar panels will produce the largest amount of energy in the typically sunny summer months, they also work on cloudy days. In fact, in Oxfordshire, you can expect to see an average generation of 177 kWh in November, 139 kWh in December and 155 kWh in January, meaning that you’ll get year-round benefit from your investment. Every unit you generate using solar is a unit you don’t have to purchase from the grid.