Immersion Water Heater Solar PV Relay Switch to use electric immersion heater when the sun shines and save on FIT electricity bills, is this a good idea? and can anyone spot a difference between £190
The cheap one doesn't monitor the incoming electricity - it just guesses from the sunlight level if your system is generating enough power. Cheap but it does work the immersion at full power. Sounds an interesting idea.
The expensive one monitors the power level from the PV array but will only work with an 800W -> 1Kw immesrion heater so doesn't heat the water very quickly.
Wait six months for a better one to come along :-)
So what? I haven't had a bath in over 40 years.
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