This figure is based on the capital cost of a lithium-ion battery amortized over the useful life of the battery. For example, a battery that costs $150 per kilowatt-hour of capacity with a life cycle of 500 charges would, over its lifetime, cost $150 / 500, or $0.30 per kilowatt-hour.

So if a consumer tried to store enough electricity in this lithium-ion battery to run her house, she would be paying at least $0.30 per kilowatt-hour for the battery.

According to the EIA, the average price of electricity for consumers in the United States is around $0.10 per kilowatt-hour. The European Union, where prices average 20 cents per kilowatt-hour, and India, where they range from 2 to 15 cents, would see similarly dramatic increases.