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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.
I based the 35 U.S. cents/KWH on the news report, but that number might very well be wrong. I did a bit more searching, and per this report the average cost per KWH for 8/11 ranged from 25-33C/KWH, up about 30% over the past 3-5 years. So if you go with 28c, that comes out to 22 cents in USD.About 2/3rds of the amount I extrapolated from that news report.ere is a global comparison of electricity prices. Not sure what the average NZ price is... http://en.wikipedia.org/wiki/Electri...ice_comparison 65 cents/hour ($255 a month at 13hrs/d) for one 1500W gas radiator does seem a bit high.