That electricity would cost no more than 13 cents per kilowatt - hour, the current average price of power in the state, although the company refused to reveal how much the existing plant cost to build or what price Southern California Edison is paying for the power. (scientificamerican.com)
Given the current average price of gas is around $ 2.60, this works out to a rewards rate of 2.31 % ($ 0.06 / $ 2.60). (valuepenguin.com)
Using the current average price of $ 2.337 per gallon for regular gasoline, that works out to a savings between 2.1 % and 10.7 % on each gas purchase. (valuepenguin.com)