Favorably. 84% is 16% loss. batteries are 20-30% loss. hydro can compete, but the southwest has lots of sun and hills. not so much with huge supplies of cheap or free water.

the southwest is nice, because 300+ days of sun. cloud cover may reduce efficiency, but might actually improve it. clouds reflect more light from the ground.

There are many options for storage. Trains are very very good. You need to beat 80% to beat a train. Some things can do that, but they're not cheap, like land in the SW.