Consider Tesla’s most famous battery project, a 129 megawatt-hour lithium battery storage center in Australia. It provides enough backup power for 7,500 homes for four hours.8 But, there are nine million homes in Australia, and 8,760 hours in a year. One of the largest lithium battery storage centers in the world is in Escondido, California. But it can only store enough power for about twenty-four thousand American homes for four hours.9 There are about 134 million households in the United States. To back up all the homes, businesses, and factories on the U.S. electrical grid for four hours,
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