I've created this calculator as an easier to use and better looking version of my original solar calculator. Let me know if you think it is better, or even if you still prefer the original! Also if you think I should add any features, or if anything does not make sense, please drop me a line here.
You can use this calculator to get a "No BS" calculation of the cash flows and financial payback that you can expect if you invest in a solar system. Simply input your state, system size, and the price you have been quoted on the left, and the chart will show you whether you will be be better or worse off with solar.
Unlike any other calculator I am aware of this tool includes all the things that you need to consider to get an accurate ROI calculation like the Opportunity Cost of not being able to invest your cash elsewhere, system degradation and inverter replacement after 20 years. Click on the "Advanced Options" to see all these settings.
If you are considering adding the system to your mortgage or getting a loan to cover the solar system cost, then simply click the relevant tab to see if either of those financing option make sense.
I hope you find it useful!