There is no pump with the heating from the solar PV, excess power is diverted to the immersion heater.
Regardless, I can't see any explenation for the small variations, then large step. If the small variations are correct, there is no way the water could jump by 10 degrees in a minute or two.
Regardless, I can't see any explenation for the small variations, then large step. If the small variations are correct, there is no way the water could jump by 10 degrees in a minute or two.
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