Mr. James had a 4kW system fitted to his property with a solar immersion controller. The install took one day and was relatively easy due to the low pitch roof and type of tile that was on there.
The immersion controller sends energy you would not use back to the grid and diverts it to your immersion heater in your cylinder. This diverter is a highly efficient way to heat your hot water, and in the spring and summer months it can take over from the boiler doing it.
Not only do you get to use this otherwise wasted energy, but you also still get paid for the export tariff that the system produces.
If you would like to know more about this, then please get in touch.