Does Ameren Illinois still have net metering in 2026 — and how does it work now?

Under the Climate and Equitable Jobs Act, net metering benefits changed for new customers effective January 1, 2025. In Ameren's own words, new net metering customers receive only supply and transmission service credits for excess generation pushed to the grid — delivery-service credits ended for new systems. Ameren notes this still reduces bills, because your generator's output replaces electricity you'd otherwise pull from its system.

That's the same statewide transition ComEd customers hit, described slightly differently: ComEd's Price to Compare already bundles supply and transmission into one number, while Ameren breaks the two out. Either way, the practical result is identical — exports credit the energy side of the bill, not the delivery side. Statewide numbers for both territories: Illinois solar facts.

The distinction that actually moves money: solar you use directly never crosses the meter at all. Ameren is explicit that energy produced by your array and used in your home doesn't register on the utility meter — the meter only records excess generation pushed out and energy pulled in. So self-consumed solar avoids the full cost of a kilowatt-hour, while exported solar earns the narrower credit. That asymmetry is the whole design problem in 2026. What stays on the bill either way: your electric bill after solar.

One genuinely new piece of flexibility: as of June 1, 2026, Ameren says net metering customers can choose from its full slate of rate plans and compare them directly through a rate-comparison tool on their online Account Dashboard. Net metering used to lock you into the standard rate by default — that's no longer automatically the case. It's worth a look before you assume the default plan is still your best option.

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Generally yes, and Ameren set a precise line: residential and small non-residential customers whose generation was installed, with all required documentation demonstrating the installation was complete submitted by 5 p.m. CST on December 31, 2024, are eligible for full netting for the 30-year life of the generator. The documentation had to be on the project's Construction Complete form in Ameren Illinois' PowerClerk portal by that deadline.

Note the mechanics differ from ComEd's, which keys on the interconnection date. At Ameren, the trigger was installation complete and documented in PowerClerk by a specific clock time. If you're buying a home with existing panels, that paperwork is what proves what the buyer inherits — verify it before closing, not after. The rest of the sale checklist: selling a house with solar in Illinois.

For applications after January 1, 2025, excess generation is credited to your bill's supply section, and Ameren states those credits do not expire — they carry over until used. When you apply, you pick one of two crediting methods, and Ameren is explicit that this choice is a one-time decision and cannot be changed later.

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The plain-English read: kWh netting banks energy, so a credit earned in June is still worth a kilowatt-hour in January no matter what supply prices do. Monetary netting banks dollars at the price in effect when you exported. Which is better depends on where you think Illinois supply prices go — and given the rate trajectory, that's not a throwaway question. Ask your installer to walk you through both against your own production model, because you cannot undo it. How much a winter month actually produces: solar panels in an Illinois winter.

Not under net metering. Net metering is a compensation method where your output offsets usage on your bill — credits, not income. Ameren does run a separate election, Rider QF (Qualifying Facilities), where after establishing distributed generation you can apply to be compensated for a qualifying generator's output based on Midwest wholesale electric market prices. That's a fundamentally different basis than retail supply credits.

Ameren explains why: it owns no generation plants and procures all its power from the wholesale market, so QF customers are compensated from an annual compilation of Midwest wholesale market pricing data, shaped to on- and off-peak periods, at the same level across all rate zones. Current rates are published in the Rider QF tariff. Generators with nameplate capacity above 2,000 kVA may qualify for compensation through Rider QF.

For a typical rooftop, net metering is the standard path — but the two are separate tariffs, and the smart-inverter rebate is available under either. If a salesperson describes Ameren "buying your power," ask which tariff they mean and at what rate. Neither path is a tax credit: the federal homeowner credit ended December 31, 2025, and Illinois has no state solar tax credit.

The same logic that governs ComEd applies here: because self-consumed kilowatt-hours avoid the full retail cost while exported ones earn narrower credits, the system that pencils best is sized to your actual usage — not the largest one that fits. Start with your own 12 months of data, which Ameren makes available to download through your online account for exactly this purpose.

• Pull your real usage first. Illinois homes averaged about 693 kWh/month in 2024 per the U.S. EIA — that's context, not a sizing input. What that usage costs today: the average Illinois electric bill.
• Illinois production runs roughly 1,100–1,300 kWh per kW per year (illustrative) — orientation, tilt, and shade move it materially. Demand a production model. Roof and shade decide most of it: what a roof needs to qualify and whether yours is too shaded. Ask how the panels are rated for storms too: do solar panels survive hail?
• Ameren's tiered supply price matters here: from October 1, 2026 through May 2027 the Price to Compare is 10.441¢ on the first 800 kWh a month and 8.262¢ beyond, so your consumption profile, not just your annual total, shapes the math.
• 0–10 kW-AC earns the strongest Illinois Shines REC tier (Group A, $70.37/REC, plus the $20 customer-owned adder) — >10–25 kW-AC steps down to $60.92/REC. Full REC mechanics and every tier → The adder applies only to systems you own, one reason leasing vs buying changes the math.
• REC payments changed timing in 2026, not just price. Under the Clean and Reliable Grid Affordability Act, Small Distributed Generation contracts approved on or after June 1, 2026 pay 50% upfront at energization, with the rest paid out over the following 6 years — a different cash-flow shape than the older lump-sum structure. Worth factoring into any payback timeline you're shown.
• If you have legacy netting, size decisions carry a hidden cost: a 100% increase can end it. Plan for an EV or heat pump before you install, not after.
• Sizing and system cost are their own questions — how big a system you actually need and what Illinois systems cost, by the state's own numbers. Whether the whole system pencils out: is solar worth it in Illinois? How panels are treated at assessment time: solar and Illinois property taxes.

Ameren Illinois customers apply online for the interconnection, net metering, and Qualifying Facilities applications together, and a certified installer normally submits all the paperwork on your behalf. Ameren tracks the project through PowerClerk, its application software, and emails you as the application moves. Self-installing? Ameren publishes a PowerClerk application guide.

Ameren is unambiguous about the finish line: you cannot operate your system until the interconnection application is approved and you've submitted a Certificate of Completion in accordance with Illinois Administrative Code Title 83 Part 466 and received a signed Certificate of Completion back from Ameren Illinois. That same rule, Part 466, sets review deadlines for every Illinois utility, Ameren included; the full clock with its citations is in our ComEd net metering guide. Installations after December 31, 2013 must be self-installed or installed by a certified installer under Part 468 of the Admin Code. Municipal inspection requirements vary — Ameren says to check with your municipality. For Ameren's largest city, the steps are in solar panels in Peoria; if you live in an HOA, what an Illinois HOA can and cannot require.

Two more things worth knowing. Ameren's meter does not measure your array's total production, so use your installer's monitoring for that. And Ameren states plainly that it doesn't sell solar products, guarantee savings claims, or partner with any solar contractors — which makes "I'm with Ameren" at your door a red flag, not a credential. Ameren points customers to the ICC's certified-installer list instead — or use the state's own registry to verify any installer is a legitimate Illinois Shines Approved Vendor before you sign anything. Already holding a quote? Here's how to vet it, and how dealer fees hide inside a loan.

Ameren will still connect you and deliver power when your system falls short — being on an ARES doesn't block solar. But Ameren adds a caveat worth taking seriously: if you have an alternative retail energy supplier, contact them to confirm they support net metering. Not every supply contract handles it the same way.

If you chose monetary crediting, your supplier matters twice over — Ameren bases monetary credits on either its own current-month supply pricing or your Alternate Retail Supplier's pricing. Before switching suppliers with solar on the roof, get the netting treatment in writing. CUB has long cautioned that many ARES offers cost more than the utility's default rate over time; compare any offer against the current Price to Compare at Plug In Illinois first.

Yes, but Ameren's rules differ from ComEd's. Ameren's published rebate terms say any battery in a smart-inverter rebate application must be charged by an on-site generator that uses a renewable resource — solar, in practice. The residential battery rebate is $300 per kWh of storage, and Ameren says a battery should also be approved by Ameren to operate alongside your solar.

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ComEd moved first. Its rewritten net metering rules took effect September 14, 2026, allowing grid charging for solar-paired batteries and starting net metering for batteries with no solar on January 1, 2027: what changed in ComEd territory. Ameren's program for batteries that share power with the grid has its own page: Ameren's virtual power plant and battery rebate. The statewide picture, and whether a battery pays: Illinois battery incentives and is a home battery worth it in Illinois?