Storage systems turn solar power from a “use it or lose it” resource into a reliable, flexible energy source. Atlas Copco's guide on solar energy storage lays out the basics of thermal, mechanical, and battery storage, and helps readers understand which method works best. . The AES Lawai Solar Project in Kauai, Hawaii has a 100 megawatt-hour battery energy storage system paired with a solar photovoltaic system. Sometimes two is better than one. If electricity isn't stored, it has. . Energy storage allows energy to be saved for use at a later time. It helps maintain the balance between energy supply and demand, which can vary hourly, seasonally, and by location.
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