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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.
Posted on 25 November 2013 by CompareMySolar. The price of electricity in the UK in 2013 averages 17.2 pence per kWh according to updated analysis of CompareMySolar, following last years article.he 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): This gives us the following average price per kWh per energy company 1  : British Gas: 16.6 pence per kWh.