This recent report by Solar Power Rocks is a great resource in showing the state of solar in each state, in the US for 2019.

The report rates each of the 50 states based on 10 factors and then assigns an overall weighted average grade for each sate based on these factors.

1) Overall Grade
2) Renewable Portfolio Standard (RPS)
3) Solar Carve Out
4) Electricity Price
5) Net Metering
6) Interconnection
7) Solar Rebates
8) State Solar Tax Credits
9) Performance Payments
10) Sales Tax Exemption
11) Property Tax Exemption

Based on this, here are the rankings of states by grade:

A: MA, NJ, RI. MD, DC, CT, VT, NY, CO, MN

B: NH, CA, NM, OR, IL, NV, DE, HI

C: IA, ME, AZ, OH, NC, MO, PA, IN, MY, SC, FL, AK, WI, UT, VA, TX

D: MI, KS, NE, WY, WV, WA, TN

F: SD, AR, ID, KY, ND, GA, MO, OK, LA, AL