Is it possible to run the pump from a photovoltaic (PV) panel?
It is possible to add a photo-voltaic solar collector to run the controller and pump for a solar thermal system. The advantage is that no mains electricity is required. The photo-voltaic collector, battery and controller can cost almost as much as the solar thermal collector they are attached to. The amount of energy they produce, in comparison is tiny. It is for this reason that we generally recommend that a low-power solar pump is driven from the mains supply unless the unit is mounted remotely. Homeowners can choose to buy there electricity from a renewable source. See our links page for suggestions.