Rate RST — Residential Time-of-Use Service
Service area: MidAmerican Energy electric service territory in Iowa
Rate version: Current Iowa Rate RST tariff · verified 2026-09-29
$8.50 monthly basic service charge is excluded from marginal-energy calculations.
| Season | Period | Hours | Rate |
|---|---|---|---|
| Summer | On-peak | Weekdays 1–6 p.m. | 20.9250¢/kWh |
| Summer | Off-peak | Daily 10 p.m.–8 a.m. | 6.5530¢/kWh |
| Summer | All other | All remaining hours | 9.0290¢/kWh |
| Winter | On-peak | Weekdays 1–6 p.m. | 7.8090¢/kWh |
| Winter | Off-peak | Daily 10 p.m.–8 a.m. | 6.6560¢/kWh |
| Winter | All other | All remaining hours | 7.8090¢/kWh |
Modeling boundary
MidAmerican Iowa Rate RST base TOU energy charges are modeled. Summer is June–September; winter is October–May. On-peak is weekdays 1–6 p.m., off-peak is daily 10 p.m.–8 a.m., and listed U.S. holidays have no on-peak hours. Riders/adjustments and the $8.50 service charge are excluded.
Official sources
EV charging cost examples on MidAmerican Energy
Vehicle-specific pages below apply Rate RST — Residential Time-of-Use Service to each EV’s verified charging-efficiency profile and compare it with the Iowa statewide average.
How MidAmerican Energy differs from the Iowa average
Eligibility / billing boundary: MidAmerican Iowa Rate RST base TOU energy charges are modeled. Summer is June–September; winter is October–May. On-peak is weekdays 1–6 p.m., off-peak is daily 10 p.m.–8 a.m., and listed U.S. holidays have no on-peak hours. Riders/adjustments and the $8.50 service charge are excluded.
The state average is a benchmark, not a substitute for this tariff. A low or high encoded period is a marginal energy price and should not be interpreted as a complete monthly bill unless the page explicitly says whole-bill modeling is supported.
Official source: MidAmerican Iowa Rate RST tariff and TOU guidance.
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