Originally Posted By: paul
You only need to power off the circulation pump that circulates the fluid from the collector to the water heater.

It has no pump. The only sensor is a temperature and level sensor connected to a readout inside the house. It doesn't control anything. The water has to be regularly filled manually with a valve. If you operate the electric heater when the water level is too low it burns out. Basically it's a bit of work to use but automating it would be a much bigger task than is worth it. Especially since it's owned by the landlord.