Over the past 10 years, most people have bought and used solar panels as an investment vehicle based on tariffs provided through the MCS scheme and Ofgem. As we move into a non-subsidised era, solar panel system costs have reduced significantly and make the use of solar panels a more commercially sensible option.
An average new build customer will use around 5-6000kWh per year of electrical energy based on a medium-sized home. If you consider that a good quality 4kW solar system will generate around 4000kWh per year you should expect to save about 40% of your energy costs using solar panels. Adding a battery storage system would allow 100% of this energy generated to be used.