The Sun is an infinite source of energy. However, in order to fully harness its power, we must find a way to store solar energy to use even when the sun isnt shining.
Without storage, some generation by solar may be taken offline to avoid over-generation, essentially throwing away valuable energy. With storage, this energy can be collected and utilized on cloudy days, at night, or in the event of an electrical disruption, when solar production is low. How do we store this valuable energy? Some rely on batteries, but
mechanical storage's popularity is rising as it has begun to be recognized as a more sustainable option.