Going Solar with Ameren Missouri: Net Metering, Interconnection and Rebates

Missouri's net metering law in brief

Missouri's Net Metering and Easy Connection Act (RSMo 386.890) requires electric utilities, including investor-owned utilities, municipal utilities and rural electric cooperatives, to offer net metering for qualifying renewable systems of 100 kW or less. In general, the energy your system sends to the grid is netted against what you use in a billing period. If you export more than you use, the excess is credited at the utility's avoided cost, which is much lower than the retail rate. Credits are applied to future bills and expire after 12 months. Monthly customer or service charges still apply.

In practical terms, solar pays best when it offsets the power you would otherwise buy at the retail rate. Oversizing a system to sell power back rarely pays off in Missouri.

Ameren Missouri specifics

Net metering. Ameren Missouri offers net metering for qualifying systems up to 100 kW. Ameren lists the credit for excess generation at 3.84 cents per kWh in June through September and 3.39 cents per kWh in October through May. Rates change, so check Ameren's net metering page or tariff for the current figure.

Rate options. Since June 1, 2026, Ameren Missouri net metering customers can choose any of its residential rate options, including time-of-use plans. The Missouri Public Service Commission approved this change in May 2026 (Case No. ER-2024-0319). A time-of-use plan can pair well with a battery, but compare your options with your own usage before you switch.

No more solar rebate. Ameren Missouri's solar rebate program ended. Ameren says that systems that didn't complete the requirements by December 31, 2023, are not eligible. Be wary of anyone promising an Ameren solar rebate on a new system today.

Interconnection. New and expanded systems still go through Ameren's application process. The steps include an application before installation, then post-construction paperwork (Ameren's sections E and F) and any local inspection approval. Ameren then inspects as needed and sets a bidirectional meter before you're allowed to operate in parallel with the grid. Don't turn the system on before Ameren gives permission.

Existing systems. If you're adding panels or a battery, replacing an inverter, or reinstalling panels after a roof replacement, ask whether Ameren needs an updated application.

How Solar Sam can help Ameren Missouri customers

Solar Sam is a Columbia, Missouri solar and electrical contractor serving mid-Missouri. We are not affiliated with Ameren Missouri. The utility approves the interconnection and sets the meter, and we handle the work on your side of the meter:

• Sizing a new system based on your actual usage history, so you aren't overbuilding past what the utility will credit.
• Interconnection paperwork. We prepare the application, the one-line diagram and the equipment specifications the utility and your local permit office require.
• Batteries and backup. Storage lets you use more of your own solar at night and keep key circuits running during an outage. A generator is another option for longer outages.
• Service on existing systems, including systems installed by companies that have since closed: inspections, repairs, monitoring reconnection and detach-and-reset for roof replacements.
• Electrical upgrades, such as panel replacements, that a solar or battery project sometimes requires.

Call (573) 819-9623 to talk through your bills and your roof. We'll tell you honestly whether solar makes sense for your home under Ameren Missouri's current rules.

A note on tax credits

The federal residential clean energy credit (Section 25D) ended for systems placed in service after December 31, 2025, so homeowners shouldn't plan on it for a new purchase. Ask a tax professional about your own situation.

This article is general information, not legal or financial advice. Company and utility details change, so check the linked sources and your own documents. Last reviewed October 2026.