Somewhere with real time pricing. The cheapest normal pricing is down around 12-13 cents per kWh. Granted due to the enormous nuclear base load in Chicago, I routinely pay 1-2 cents per kWh. I paid zero cents at 4am.

Central Ohio [1]. I didn't realize it was so cheap.

1. https://www.betterbuyenergy.com/ - Zip 43215