A Word on Paybacks

January 28, 2004 by
Filed under: Solar Energy 

This system is expected to generate about 500-550 kWh per month on average. That will end up being about 2/3 of our electric bill.

That makes the payback for the system about 15-20 years, depending on how quickly electric rates increase during those years.

However, some studies that my installer provided (and that I’ve seen online) state that solar electricity systems have a payback in property values of 100%. The only other home improvement project that has a 100% payback is a kitchen remodel (pools are about 60%, decks about 40%).

You really have to have a motive other than cost savings to put this stuff in – otherwise it’s too expensive. In my case, it’s to increase the ability to generate electricity in a clean manner. For every watt of electricity that I generate, I’m most likely saving generation of a watt through some polluting method – natural gas, oil, coal, etc. There’s some pollution involved in making the solar cells in the first place, but that’s some smallish percentage of the pollution avoided in their use.

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And the annual savings don’t hurt either. We estimate that this system will produce negative electric bills for the months of April – June, with a positive bill for the rest of the year. Overall you can’t exceed the usage of your house – the rebate program prohibits you from being a net producer of electricity (as opposed to a net consumer) on an annual basis.

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One Comment on A Word on Paybacks

  1. Clee on Thu, 16th Nov 2006 7:06 pm

    2. Do you have any URLs for these online studies of property value payback? Thanks.

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