All utilities › Missouri › Ameren Missouri
Union Electric Company d/b/a Ameren Missouri: what it publishes for small generators (qualifying facilities) under PURPA, field by field, with the source for each. Checked on October 4, 2026.
When this may change: Biennial: 20 CSR 4240-3.155(3) requires cogeneration tariffs and data to be updated and revised on or before January 15 of every odd-numbered year unless the Commission orders otherwise; next filing due by January 15, 2027.
Rates, eligibility and contract terms change: confirm them with the utility or the state utility commission before relying on them.
| Schedule | MO.P.S.C. Schedule No. 6, Sheet No. 170-170.4: Electric Power Purchases from Qualifying Facilities (7th Revised Sheet No. 170 carries the standard rates)Source: ameren.com: uecsheet170eppqfcogen.ashx · checked 2026-10-04 | |||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Docket or order | Missouri PSC Tariff Tracking No. JE-2025-0110 (2025 biennial QF/net metering rate update filed January 15, 2025); status shown on EFIS as Effective (3/1/2025) Note: No separate approval order is listed on the tracking page; the sheet took effect after two effective-date extensions (to Feb 28 and then Mar 1, 2025). Source: efis.psc.mo.gov: 92568 · also: efis.psc.mo.gov: 814125 · checked 2026-10-04 | |||||||||||||||||||||
| Effective date | 2025-03-01Source: ameren.com: uecsheet170eppqfcogen.ashx · also: efis.psc.mo.gov: 92568 · checked 2026-10-04 | |||||||||||||||||||||
| Next update | Biennial: 20 CSR 4240-3.155(3) requires cogeneration tariffs and data to be updated and revised on or before January 15 of every odd-numbered year unless the Commission orders otherwise; next filing due by January 15, 2027.Source: sos.mo.gov: 20c4240-3.pdf · also: efis.psc.mo.gov: 814125 · checked 2026-10-04 | |||||||||||||||||||||
| Size cap | Standard rates apply to customers with a design capacity of 500 kW or less. Company is not obligated to enter new contracts with QFs larger than 20,000 kW net capacity (FERC Docket No. QM16-2-000, June 30, 2016).Source: ameren.com: uecsheet170eppqfcogen.ashx · checked 2026-10-04 | |||||||||||||||||||||
| Resource types | Any Qualifying Facility (cogeneration or small power production) under Missouri PSC rule 4 CSR 240-20.060 (now 20 CSR 4240-20.060); one rate table for all technologies.Source: ameren.com: uecsheet170eppqfcogen.ashx · checked 2026-10-04 | |||||||||||||||||||||
| Energy rate structure | Two options: (a) non-time-differentiated seasonal energy rate (Summer = June-September billing periods, Winter = October-May); (b) time-differentiated seasonal rates for Weekday 10 AM-10 PM, Weekday 10 PM-10 AM, and Saturday/Sunday/Holiday. A monthly customer charge per meter applies ($4.00/$6.00 single/three phase non-time-differentiated; $13.00/$15.00 time-differentiated).Source: ameren.com: uecsheet170eppqfcogen.ashx · checked 2026-10-04 | |||||||||||||||||||||
| Energy rates (sample cells) |
Copied as printed: a few labelled cells, not the full rate matrix. The whole schedule is linked below. Source: ameren.com: uecsheet170eppqfcogen.ashx · checked 2026-10-04 | |||||||||||||||||||||
| Capacity payment | None printed: the standard rates on Sheet 170 are energy rates only (per kWh); no separate capacity payment is listed.Source: ameren.com: uecsheet170eppqfcogen.ashx · checked 2026-10-04 | |||||||||||||||||||||
| Contract terms | A written contract is required before any purchase, whether or not standard rates are used; monthly billing follows the contract. No contract length is printed in the tariff.Source: ameren.com: uecsheet170eppqfcogen.ashx · checked 2026-10-04 | |||||||||||||||||||||
| Price fixity | Standard rates are tariff rates revised every two years (January 15 of odd-numbered years under 20 CSR 4240-3.155); the tariff prints no fixed-price term. Note: 20 CSR 4240-20.060(4)(D) separately gives a QF with a legally enforceable obligation the option of avoided costs at time of delivery or at the time the obligation is incurred; the tariff does not state how this is applied. Source: ameren.com: uecsheet170eppqfcogen.ashx · also: efis.psc.mo.gov: 814125, sos.mo.gov: 20c4240-20.pdf · checked 2026-10-04 | |||||||||||||||||||||
| Schedule link | https://www.ameren.com/-/media/rates/missouri/residential/electric-rates/electric-power-purchases/uecsheet170eppqfcogen.ashxSource: ameren.com: uecsheet170eppqfcogen.ashx · checked 2026-10-04 |
Values are copied as printed in the source. Where a value draws on more than one document, every source is listed, primary first.
Also in Missouri: Evergy Missouri Metro, Evergy Missouri West, Liberty (Empire). All 59 utilities. Get every utility as CSV/JSON.