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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.
this graph is based on price per kwh on the 30th of october 2012 and includes all the price rises that have been announced by five out of six utility companies e on still has to announce theirs it gives us the following average price per kwh per energy company british gas 15 1 pence per kwhedf energy 16 0 pence per kwh npower 16 2 pence per kwh e on energy 14 8 pence per kwh 2012 increase not included scottishpower 16 8 pence per kwh sse 15 5 pence per kwhhe following graph gives average rates for low 2100 kwh per year medium 3300 kwh and high 5100 kwh electricity users that either pay by direct debit cheaper or standard credit more expensive