Usually they're "sold" to the installer, who gives you a discount of the same amount. These are credits for every megawatt hour it's estimated your system will be able to generate over the next 15 years. These costs take into account the federal incentive of small-scale technology certificates, which trade in the market like shares. Most systems installed are under three kilowatts, according to a survey by Choice last year. Incidentally the reason for the big price range for each size is that a lot depends on how many panels you need, what your roof is made of, and sundry things such as whether you need a new meter and wiring or trees have to be removed. A souped-up five kilowatt affair, probably enough to light up a whole suburb, will cost $7000 to $11,500. In fact the cost of installing a system has fallen faster than the government subsidies.Ī 1.5 kilowatt system, which should satisfy about one-third of the average household's electricity consumption, costs between $3000 to $6000. Many people believe that it's become more expensive because government subsidies are falling.
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