Each Missouriutility has a different cohort and pitch. Pick the customer's utility to open its rep guide.
Ameren Missouri · St. Louis metro + eastern & central Missouri (~1.2M electric customers)
Avoided-cost net billing by label, but MONTHLY netting: Ameren nets all your kWh against each other at the full retail rate (~13¢/kWh) over the billing month, so a battery's day/night shifting is already done for free by the netting — the battery does NOT reduce today's bill here (~$0 bill arbitrage). Only the monthly NET EXCESS (over-production) is credited at the seasonal avoided-fuel-cost rate — $0.0384/kWh summer / $0.0339/kWh winter (MO.P.S.C. No. 6, Sheet 171, eff 3/1/2025; cents carry a confirm-current conflict) — expiring at 12 months with no cash-out, so size to consumption (a battery cannot move excess between months). NM runs on the flat Anytime rate — Sheet 171.1 bars pairing NM with an Optional Time-of-Day rate, so there's no intra-day price to arbitrage (Ameren's 2026 FAQ suggests all five plans may now allow NM — confirm current). $9.00/mo customer charge; one-time bidirectional meter cost (customer reimburses actual cost per tariff). 100 kW residential cap; max nameplate = (prior-12-month kWh) ÷ (8,760 × 15.6%). Battery value = resilience + rate-hedge + position + system takeover, not bill savings.
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Evergy Missouri · Kansas City metro (Evergy Missouri Metro jurisdiction) · ~600,000 customers
Avoided-cost net billing by label, but MONTHLY netting on the default plan: Evergy nets all your kWh across the billing month at retail (~12.8¢/kWh blended, KC Metro) under the standard Schedule NM (Sheet 34D), so a battery's day/night shifting changes nothing at month-end — the battery does NOT reduce today's bill (~$0 bill arbitrage). Only the monthly NET EXCESS is credited at avoided fuel cost — $0.0190/kWh (Metro, Sheet 31A, eff 2/21/2025) — expiring on a rolling 12-month basis with no cash-out (a sizing matter; size to consumption). The default residential rate is Peak Reward Saver (RPKA), whose energy charge is flat across hours, so there's no intra-day energy differential to arbitrage. ADVANCED (per-customer, never default savings): electing a real TOU rate (RTOU) moves you to per-period NM-TOU netting with a ~22.5–28¢/kWh peak differential a battery could capture — rider-under-NM interaction UNCONFIRMED. $12.00/mo customer charge. Battery value = resilience + rate-hedge + position + system takeover, not bill savings.
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