Free Hot Water!
By paulbarlow78, Oct 17 2012 08:14PM
We have just started to fit this little gadget, an Immersun Water Heater switch.
It sense's any excess power generated by your solar panels and turns your immersion heater on, rather than send it back to the grid!
That way you get paid to generate it and you use it all yourself and get FREE hot water! Bargain!