The controller has a water setting thawing no other settings inside the regular thawing temperature constant water level
Solar controller with live heating, with no electric heating, and now your controller without electric heating, can only replace a charged heating. "Solar public welfare network" free consultation
This can only rely on the sun to pull. Sun drying water is not enough water, you can only install a heating tube pull! Also choose a thick power cord. Thin line not work. Control can not pass your controller, an external air switch on it.
The above heating of the controller is in the absence of the sun and you need to use hot water to add, so that you can use hot and cold weather.
Solar energy itself is the hot water of the stuff, certainly can be heated, but not with electric heating only.
