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A two-year apartment pilot in Bucharest uses semi-transparent photovoltaic windows to heat domestic water directly in DC, turning an ordinary water tank into thermal storage without a solar inverter or battery.
By Adrian Băisan, PhotoVoltaic Windows SRL
For people living in apartment buildings, using solar energy is not as straightforward as it is for homeowners who have access to their own roofs.
Millions of apartment residents have no usable roof area of their own. In many cases, the only surfaces directly available to them are balconies, balustrades and windows.
