MidAmerican Energy Co

MidAmerican's EV-eligible time-of-use option is called Rate RST and is available to residential customers using 50,000 kWh or less annually. Off-peak hours run from 10 p.m. to 8 a.m. every day at a rate of 6 cents per kWh. During summer billing months (June through September), the on-peak window is 1 p.m. to 6 p.m. on weekdays, priced at 20 cents per kWh; all other summer hours cost 9 cents per kWh. Outside of summer, non-on-peak hours drop to 7 cents per kWh. An EV owner who charges overnight will nearly always fall in the off-peak window. Enrolling requires contacting MidAmerican directly; the utility installs a TOU meter at no charge and requires a 12-month commitment before switching back.

The $500 Level 2 charger rebate is available to residential MidAmerican customers in Iowa through December 31, 2026, or until program funds are exhausted. Installation must be performed by a licensed electrician on a dedicated GFCI-protected circuit. Enrolling in Rate RST and claiming the charger rebate are separate actions that can be completed together. A commercial EV charger rebate appeared in older DOE AFDC records with a 2022 install window, but current sources do not confirm an active commercial program; business customers should contact MidAmerican directly before planning around a commercial incentive.

MidAmerican is a rate-regulated investor-owned utility under Iowa Utilities Commission jurisdiction, meaning its tariffs and rebate programs require IUC approval. Iowa is a regulated (non-deregulated) electricity market, so customers in MidAmerican's territory cannot choose an alternative retail supplier. Iowa's electricity rates rank among the lowest in the nation (EIA data), which means the off-peak TOU rate of 6 cents per kWh represents a meaningful operating cost advantage for overnight home charging compared to most U.S. markets.