Solar water heaters help homes cut energy bills by using sunlight instead of electricity. The system offers steady heating, ...

Netherlands-based Triple Solar has unveiled a residential PVT heat pump system that uses waste heat from PV modules as the heat source. Triple Solar’s Heat Pump 5.0 does not require an outdoor unit.

Dear Jim: We have a large family and use much hot water. I cannot afford to have a solar water heating system installed, but I would like to make some type of solar water heater myself. What do you ...

An international research group led by Germany’s Karlsruhe Institute of Technology conducted energy, economic, and environmental assessments of 54 photovoltaic-thermal (PVT) indirect-expansion (IDX) ...

Scientists are learning how to turn the chill of outer space into a quiet source of electricity, using the night sky itself as a heat sink. By carefully managing how surfaces shed heat after dark, ...