A solar tube brings sunlight into dark rooms. It can be integrated in a roof or floor and light the area beneath. The best light transmission efficiency is achieved when the tube is short and straight. Long or angled solar tubes have less light intensity.
Photovoltaic systems often produce more electricity than needed at the time. The sun shines during daytime hours rather than at night when electricity is needed. Fortunately, solar power can be stored in a solar battery that serves as an energy reservoir.
A heat transfer fluid plays a vital role in the operation of solar water heating systems. It carries heat energy from the solar collectors through the heat exchanger and finally into the tanks that store the heat.