A disadvantage of solar energy is the need for _____. a supplemental cooling unit to prevent the water from getting too hot a sp
ecial fee for the energy collected by the unit time-consuming daily maintenance of equipment a supplemental heating unit for cloudy days, winters, and nighttimes
A supplemental heating unit for cloudy days, winters, and night times
Explanation:
Solar energy is the energy obtained from Sun and is the renewable eco-friendly source of energy. It relies on availability of Sun in sky so as to use it for energy production. Since solar energy is not available at night time, there is a need of supplemental heating unit. Similarly, amount of solar energy fluctuates during cloudy days and winters which in turn poses the need for supplemental heating unit.
