Missouri Solar and Time-of-Use Pricing: What Ameren and Evergy Customers Should Check

If your Missouri solar sales estimate uses one electricity price for every unit the panels produce, ask whether it reflects your current rate plan. Ameren Missouri and Evergy customers need separate calculations, and different plans within the same utility can also treat the bill differently.

Ameren's June 1, 2026 tariff revisions are a particular reason to revisit an older proposal. The Missouri Public Service Commission lists the filing as approved, and Ameren says net-metering customers can now choose among its five residential rate options.

That does not mean every Missouri solar household must move to the same time-of-use plan. Start with the legal utility name and the rate printed on your own bill.

Ameren: the netting method depends on the plan

Ameren's current net-metering sheet distinguishes Anytime service, Evening/Morning Saver, and the Smart Saver, Overnight Saver, and Ultimate Saver plans. Evening/Morning Saver uses monthly net consumption with a separate on-peak adjustment. The latter three plans calculate net energy within time-of-use periods.

Ask the installer to name the specific plan used in its model. If it recommends a different plan, request a comparison that uses the same household usage and production assumptions for both. Changing the assumed rate and the assumed behavior at the same time makes it difficult to see what is driving the result.

Ameren's residential schedule also distinguishes the current plans from an older grandfathered Optional Time-of-Day pilot that excludes net-metering participants. A restriction quoted from the older pilot should not be presented as a blanket rule against the current options.

A surplus credit is a different part of the calculation

On the Ameren sheet effective June 1, 2026, the net-metering avoided-fuel-cost rates are 3.84 cents per kWh for the June–September billing periods and 3.39 cents for October–May. Those figures apply to the defined surplus, not automatically to every unit the array generates. The tariff also preserves applicable customer charges and other billing obligations.

For a hypothetical summer surplus of 100 kWh qualifying at 3.84 cents, the credit calculation is $3.84. That is an illustration of one bill component, not an estimate of the system's entire value or your household's savings.

Ask how much of the projected production the model treats as directly useful to the home, how much offsets eligible purchases, and how much becomes surplus. The explanation should match the selected plan's netting method.

Evergy: Metro and West are separate territories

Evergy Missouri Metro and Evergy Missouri West have separate tariff schedules. Do not substitute a Kansas rate or carry an Ameren figure into an Evergy proposal.

For example, Missouri West's Nights and Weekends schedule expressly includes a net-metering rate designation, MORTN, and identifies the plan as optional. Its current rate sheet is effective February 4, 2026. The companion pricing-period sheet places weekday peak hours at 4 p.m. to 8 p.m., excluding specified holidays.

Evergy Missouri Metro's separate Schedule NM contains its own net-metering and interconnection terms. Matching the provider and schedule is a necessary step before comparing an offer or investigating a credit.

Evergy's private-generation guidance explains that time-based plans track delivered and surplus energy by pricing period. It also warns that a credit earned in one period does not simply offset usage in another. Have Evergy identify the applicable rule for your account.

Ask for a comparison you can actually check

Request a full year of estimated bills using your present plan and any recommended alternative. Have the model identify the source and effective date of each tariff, remaining fixed charges, and the treatment of excess energy. A statewide average electricity price is not a substitute.

If an estimate assumes major changes in when you use electricity, ask for a second version reflecting your normal routine. If it includes a battery, request the incremental price and assumptions separately. Equipment decisions and electrical configuration belong with qualified professionals.

For an existing system, collect actual bills and production reports from matching periods. A high bill can involve usage changes, rate design, system performance, or more than one issue. The comparison should help narrow those possibilities.

Bring the original projection and signed agreement to Solar Exit document review. Include the loan or lease schedule if your main problem is the combined monthly obligation, and describe the disputed credits in a utility-billing inquiry.

Current rate choices do not lock in decades of savings. This is general consumer information, not legal, financial, or electrical advice. Rights and outcomes depend on the agreement and circumstances. Submit your situation for review with the utility and rate clearly identified.