Availability is a big issue when it comes to solar energy. As you can guess, producing solar energy during the day ins't that much of a problem, but supplying t

Availability is a big issue when it comes to solar energy. As you can guess, producing solar energy during the day ins't that much of a problem, but supplying the demand in the evening or at night with solar energy is a much bigger challenge. So, even if takes 6 hours to heat up in the morning, it still expand the usability of solar energy for electricity production.