SolarInvest2020: SolarCalcX

Solar Farm at Disney: What's good for the mouse, is good for you too! 

UPDATE: 30% Investment Tax Credit on renewables in the IRA Act. See our Blog post here. This makes all the financial discussions below much more profitable. Also, higher inflation and higher power inflation.

As people hunker down at home, and spend time doing all those fix-up items that have been waiting for years, they should also consider working through the details of adding solar.
First, of course, do those energy efficiency tricks that cost very little: smart thermostats, caulk windows and cracks, and improve your insulation. Your favorite power company will do an energy audit so you can get a check list of things to do. The typical building can save 15% to 25% on simple and cheap energy savings. Monitor usage, because the biggest culprit may be humans with bad energy usage habits. Insulation in the attic could have a 3 to 4 year payback and reduce your electric bill by 15 to 25%. Now with the lower energy usage, you should consider adding Solar.
Solar can be a Good investment in many cases, like Residential. But it can be a Crazy Profitable investment for Businesses. The renewable investment tax credits (ITCs) drop down again at the end of 2020, so now is a great time to think about it.* 
SBP has done several detailed financial calculators for analyzing both residential and commercials solar projects. Here are articles discussing both:

1. Quick Take on  Residential Solar*: Solar Invest 2020: Do Good and Save Money Too
2. Full Financial Analysis*: SolarInvest2020: Residential Solar is Good, but Commercial Solar can be Crazy Profitable!

* Update: As of January 2021 the ITC has been extended at 26% for 2021 and 2022. See Discussion at SEIA.

UPDATE: 30% Investment Tax Credit on renewables in the IRA Act 2022. See our Blog post here. This makes all the financial discussions below much more profitable. Also, higher inflation and higher power inflation.