Free Hot Water

Smart switches measure the electricity being exported by a solar PV system, and divert it into an immersion heater, giving you free hot water. 

 

An Immersun switch diverts this electricity into an immersion heater.  It also has a secondary switch, which allows you to use the electricity in another heating source, such as a storage heater. 

Solar iBoost works in a similar way, withonly one output option, which ideal if you only require hot water.