Solar panels have gotten so cheap that the plant, born of an old attempt at harnessing the power of the sun, appears to be obsolete.

Triple Solar BV has developed a residential photovoltaic-thermal (PVT) heat pump that uses waste heat from PV modules, ...

The boiler relies on two AC heating rods and uses excess solar power from rooftop PV systems to generate domestic hot water. It is available in capacities of 125 liters, 160 liters, and 200 liters ...