I don't generally touch anything to do with solar kit but have been asked to come up with a method whereby an immersion heater can be switched from mains to solar or solar to mains.
A straight forword solution is simply a change over switch with 2 supplies in and one supply out to the heater, but because one of the input supplies is coming from solar - post-inverter so mains voltage - I would like to know if I can use a conventional change over switch or are there some special requiements for switching the mains output derived from a solar supply?
Comments welcome
