4. Solar-Powered Pumps
A drawback of some hot-water heating systems mentioned above is that they need a pump to circulate water from the solar collector to the storage tank. Normally, these pumps use electricity from the household electrical service; therefore, the system ends up consuming some of the energy you planned to save by installing it in the first place.
In order to boost the energy-saving impact, you can run those circulating pumps using solar power. You’ll need photovoltaic solar panels for this, which will produce the energy needed to run the DC motors on the pumps. Though installing such a system requires pretty good money, you’ll nearly eliminate the operating costs of your hot water system.
