An energy diverter could be a smart addition to your solar system.
This will divert any excess power generated by your solar panels (which would normally be exported back to the grid) to an immersion heater in the hot water tank.
The surplus energy can be sent to:
If you're looking for a cost-effective way of using some of the surplus energy generated by your solar panels, then a Solar Power Diverter is probably for you. You'll be making use of free energy to heat your hot water, meaning that your boiler will not have to work so hard and your gas bill will reduce.