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1 ton of coal costs $36 = $0.006 per KWH. 1 barrel of oil costs $70 = $0.05 per KWH. 1 cubic foot of gas $0.008 = $0.03 per KWH. In comparison to solar energy, the hydrocarbon fuel costs are significantly lower without rebates, tax benefits nor the cost of carbon emissions.A twoâKilowatt (KW) solar energy system costs about $45,000 and covers roughly half of a typical American householdâs energy needs.verage solar energy system costs = $8.95 per watt. In order to compare the solar energy costs to conventional hydrocarbon fuels, we must covert the $8.95 per into KWH. Letâs make two calculations to measure the total electric energy output over the lifespan of the solar energy system.
Area natural gas prices were down from one year ago when they averaged $1.084 per therm. In contrast to gasoline and utility (piped) gas prices, the average cost of electricity at 17.9 cents per kilowatt hour (kWh) in August was up from 16.9 cents per kWh spent last year.ne year ago, the local price of gasoline at $3.547 per gallon was similar to the national average of $3.540. (See chart 1.). The 17.9 cents per kWh Boston households paid for electricity in August 2015 was 26.1 percent more than the nationwide average of 14.2 cents per kWh.