Solar in illinois: worth it?

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I've done some preliminary research on going solar for my primary residence (two unit with flat roof and almost no shade according to comed and project sunroof by google)

Ive run my numbers a few times and I understand there are tax incentives and that next step is to find a contractor to give an estimate.

Anyone here on Bigger pockets willing to give both pros and cons of their solar installer/contractor and your experience of  switching over to solar.

My primary residence is long term and don't plan on going anywhere anytime soon (10 years plus)