Just got a 27.5k quote from Solar City

Hi, I'm in a single family home in PA. Solar City just gave me a 27.5k quote to install solar panels on my home. Federal tax credit is going to be ~8.5k (need to verify this).

I don't know if this number is too high or just about right. What other solar companies should I reach out to, to get some comparisons? How is Solar City? I know they recently merged with Tesla but their stock hasn't been doing well the past few years.

Thanks!