A toughened glass cap covers an insulated metallic cylinder that serves as the foundation of the FPC solar water heater. A solar collector sheet—typically made of copper—that has been coated with an absorber substance to maximise solar energy absorption is housed inside the metallic box. It is more energy-efficient to use flat plate technology in a solar water heater. It has a lengthy lifespan as well. This makes a heater like this perfect for both household and commercial use.

In colder climates, the FPC solar water heater is reliable and effective enough to function. Water heaters made by FPC cost a little more than those made by ETC. However, the cost is totally determined by the water heater's efficiency and brand.