How to apply: 1  Mix the lemon juice with vodka and apply the solution on sweaty hands. 2  Rinse it off with clean water after leaving it on for 2 minutes.
In fact, the production of solar panels is reduced by at least 50 percent on cloudy days, and may even by down to just 5 to 10 percent of what they can produce on sunny days.
Most solar thermal systems are integrated with existing domestic hot water systems or have electric backup elements that turn-on to meet hot water needs during cloudy days or in the winter months. Courtesy the Department of Energy.