Yes, solar lights can work on cloudy days, although their performance drops with less sunlight. Built-in sensors often adjust brightness.
[PDF Version]
A Trombe wall is a massive equator-facing wall that is painted a dark color in order to absorb thermal energy from incident sunlight and covered with a glass on the outside with an insulating air-gap between the wall and the glaze.
[PDF Version]
Yes — solar panels work on cloudy days. They produce 10–70 % of their rated output depending on cloud thickness, because they use diffuse (scattered) light, not just direct sunbeams.
[PDF Version]
A flywheel energy storage system functions like a mechanical battery, storing energy in the motion of a spinning mass. This is similar to how a potter's wheel or a spinning top holds energy while in motion.
[PDF Version]
