Is $50,000 to install solar panels and batteries a fair price?

I received a quote from Power Up Renewable Energy a couple of weeks ago, and they are one of the few companies with a timeline that gets us in this year, estimating early November. I am looking to do my due diligence before signing. The proposal was very competitive, possibly even better than some other quotes I received. The pay schedule seemed normal, so nothing raised my suspicions. Their reviews look great, but many are from accounts that have only left one review, though some are from very real accounts. I am leaning towards pulling the trigger but hoped for some Reddit input to ease my anxiety. I'm looking for references, as nothing I've found on BBB, Yelp, etc., looks out of the ordinary. Their Facebook page was taken down, but I don't use mine either. The reviews I feel most comfortable with are old, about a repair, or unrelated. I get nervous about extra holes in my roof, especially with rushed timelines.