Rooster73

I have replaced a pump on a domestic system that used small bore soft pipe, no antifreeze, direct to cylinder, no coil, the roof panel was part solar to drive the pump, there were 2 temp sensors on the cylinder, the pump was a diaphragm type and the house owner said the system worked well untill the pump failed, the pump was in the loft just above the main water tank, i did notice on replaceing the pump that the small bore pipe contained a lot of scale sediment.

Depending on the battery temperature, lead acid batteries can gas around 14.4v in summer, i would only recommend a charge over this voltage for a short period

A deserted goole boathouse club

Ive fitted virious solor panel regulators and they seem to charge up to 14.2 volts, over 15v i would suspect a faulty regulator