German startup Nexol Photovolthermic has released a new hybrid solar water heater for residential applications. The NEX RS series comes in four sizes: 80 liters, 120 liters, 200 liters ...

and tube solar heat collectors. Intended for demand shifting in space heating and domestic hot water (DHW) applications, the system is reportedly able to achieve a higher coefficient of ...

Energy-efficiency and clean energy projects like insulation, solar, and heat pumps can bring you thousands in federal and ...