Lots of awesome data in this pdf from Lawerence Berkeley National Laboratory.

Average national retail electricity inflation-adjusted prices dropped.

Residential prices are higher and have risen faster than commercial.

Low energy costs don't imply low monthly bills.

Most of the retail price increase is due to maintenance and hardening of transmission and distribution where equipment price increases have exceeded inflation. Generation OpEx (fuel prices) and CapEx (new generation/infrastructure) has decreased.