Solar Answers → Incentives & Programs
How does Ameren's virtual power plant program work?
Ameren Illinois' Scheduled Dispatch Virtual Power Plant — Rider SD VPP — pays $10.00 per kW of measured Performance each year to let Ameren dispatch your home battery from 4 to 6 p.m. on weekdays, June through September. Enrollment runs a minimum of five summer periods. If you took Ameren's $300-per-kWh battery rebate on or after June 1, 2026, joining is mandatory and service starts no later than March 1, 2027. The rebate requires solar; the virtual power plant itself does not.
Every figure above comes from the tariff itself. We read Rider SD VPP, Sheets 68 through 68.005 of Ameren's Illinois rate book, in full on September 16, 2026 — the rate, the five-year commitment, the exit rights and the March 2027 deadline are quoted from it below, not inferred from ComEd's version or from a press summary. There is also a second requirement, older than the virtual power plant and easier to miss, that decides whether the rebate is available to you at all.
Independent public sources we cite and link — The Day Company is not affiliated with or endorsed by Ameren Illinois, the Illinois Commerce Commission, or the Citizens Utility Board. We are an Illinois solar and battery information resource and a lead-generation business.
What is Ameren's Rider SD VPP?
It is a utility-run virtual power plant. Instead of building a peaking plant, Ameren pays customers for the right to draw on their home batteries during the hours when the grid is most strained — 4 to 6 p.m. on weekdays from June through September, which the tariff calls the Program Summer Period. Front-of-meter resources such as community solar have a slightly longer window, 4 to 7 p.m. The tariff sets a hard outside date: anyone who took the storage rebate on or after June 1, 2026 must take service no later than March 1, 2027.
"Customers submitted for and subsequently receiving a rebate for energy storage systems under Rider CGR – Customer Generation & Storage Rebate on or after June 1, 2026 must take service hereunder after tariff is operational no later than March 1, 2027."
Ameren Illinois, Rider SD VPP, Ill. C.C. No. 1, 1st Revised Sheet No. 68 — read in full September 16, 2026
One distinction almost nobody draws correctly. The rider's definition of an Eligible Energy Storage System requires only that the battery be fixed in place and sited on your premises, with a dedicated meter or smart-inverter communications. It does not require solar. A standalone battery can join the virtual power plant. What requires solar is the rebate — a separate tariff, covered further down. Confusing the two is the single most common error in coverage of this program.
The program exists because Illinois law requires it. Public Act 104-0458 — the Clean and Reliable Grid Affordability Act, enacted January 8, 2026 — amended Section 16-107.6(e) of the Public Utilities Act to direct the state's large utilities to establish scheduled-dispatch virtual power plant programs. Both Ameren and ComEd filed on June 1, 2026, the statutory deadline.
A precision point most coverage gets slightly wrong. Ameren's filing is ERM #26-097, adding Rider SD VPP at Sheet No. 68 and Original Sheet Nos. 68.001 through 68.005 of its Illinois tariff. It appeared as Agenda Item E-3 at the Commission's June 24, 2026 Regular Open Meeting, where the disposition recorded was "Do Not Suspend the Filing." That is not an approval order — the Commission declined to suspend the tariff, which allowed it to take effect on the requested date of July 16, 2026. It is an ordinary way for a compliance tariff to take effect, but "approved" is not quite the right word, and pages using it are being loose — including, in fairness, the Citizens Utility Board and an industry tracker run by the Smart Electric Power Alliance, which both describe this same June action as the ICC having "approved" Ameren's and ComEd's tariffs. We're keeping the more precise framing because the distinction is real, even where good sources don't bother with it.
How much does Ameren's virtual power plant pay?
The tariff sets one rate, and it is modest by design.
"Each Participant shall receive compensation at a rate of $10.00 of Performance paid to each Participant no later than the end of the Program Year."
Ameren Illinois, Rider SD VPP, Original Sheet No. 68.004 — read in full September 16, 2026
Performance is the tariff's own defined term, and it is what makes the number real. It means the sum of your battery's average hourly output in kilowatts across every hour of the dispatch schedule, divided by the total number of hours in that schedule. So it is not a payment per kilowatt-hour discharged, and not a payment on your battery's nameplate size — it is $10.00 for each kilowatt of average output you actually deliver across the whole season, paid once per Program Year (June 1 to May 31).
Two mechanics worth knowing before you enroll. First, joining mid-season is costly: the tariff states that for customers starting after the Program Summer Period has begun, the hours before service began count as zero, while the denominator still includes them. A late enrollment drags your first year's average down. Second, the tariff lets a Participant name someone else as the payee — if an installer or third party ever offers to handle enrollment, ask in writing who is designated to receive the annual compensation.
The statute behind the program, Public Act 104-0458, sets $10 per kW as a floor rather than a ceiling, and ComEd landed on the same figure in its separately filed tariff. Neither utility went above the minimum.
What are you actually committing to?
Five summer periods, and the tariff is specific about how they are counted.
"Enroll for a minimum of 5 Program Summer Periods beginning with the Participant's individual enrollment date. If a Participant begins taking service under the terms of this rider in the Program Summer Period window, the Participant is required to participant in the immediate partial period and the 4 subsequent periods."
Ameren Illinois, Rider SD VPP, Original Sheet No. 68.002 — read in full September 16, 2026 (typo in the original)
The exit right is where mandatory and voluntary participants part company. The tariff grants a termination right only to a participant who is not obligated to take part as a condition of compensation — in plain terms, someone who joined voluntarily rather than as a condition of the battery rebate. That notice takes effect on December 31 of the year it is given, and the tariff expressly allows re-applying afterwards.
If you took the rebate, read this twice. The rider states no exit right for rebate-obligated participants. It also states no penalty, no buy-out figure and no early-termination charge anywhere — those simply are not in the tariff. What the rebate buys is a five-year obligation you are not given a documented way out of, in exchange for roughly $4,050 on a typical battery plus a small annual Performance payment.
There is one more thing worth knowing about the horizon. The tariff requires Ameren to file a successor virtual power plant program by December 31, 2027, with Commission approval due by December 31, 2028 — and on approval, every SD VPP participant is transitioned into that new program. So the terms above are the current deal, not necessarily the deal for all five years.
Enrollment itself is handled by Ameren together with a contracted Program Administrator, and the tariff allows multiple batteries at one premises under a single participation agreement. Before service begins you must give the utility or its administrator access to your battery and smart-inverter data, agree that it may operate the system during dispatch hours, and indemnify Ameren against liability arising from the interconnection.
How did the program get here?
Five dated steps from statute to published tariff. The law passed in January, both utilities filed in June, the Commission let Ameren's tariff take effect in July without suspending it, and the rider's full text now sits in Ameren's rate book. The remaining date that matters to homeowners is March 1, 2027 — the outside deadline for rebate-obligated customers to be taking service.
Sources: Public Act 104-0458 (enacted January 8, 2026); Ameren Illinois Rider SD VPP, Ill. C.C. No. 1 Sheet Nos. 68–68.005, filed June 1, 2026 under ERM #26-097, stamped "FILED WITHOUT SUSPENSION" by Commission action June 24, 2026 and effective July 16, 2026, read in full at the tariff September 16, 2026; Ameren Illinois DER Bulletin 2026-04. Until September 2026 this sheet was a "For Future Use" placeholder in the published rate book, which is why earlier versions of this page reported the terms as unavailable.
Do you have to join the VPP to get Ameren's battery rebate?
According to Ameren's own bulletin to its renewable-energy partners, yes — and this is the part of the program that already applies rather than starting in 2027. Ameren's DER Bulletin 2026-04 states that as of June 1, 2026, energy storage rebate eligibility is linked to participation in a utility-managed virtual power plant program, and that to be eligible for a storage rebate a customer must enroll in an SD VPP program.
Ameren's own sources do not agree on this, and we are not going to pretend otherwise. The DER Bulletin states the SD VPP enrollment requirement plainly. Ameren's customer-facing rebate page, checked again on September 16, 2026, still does not mention the virtual power plant anywhere — including in the FAQ that asks directly whether a specific rate or service is required. Three and a half months after the bulletin's own effective date, that gap hasn't closed. The tariff, however, now removes any doubt about the requirement itself: Rider SD VPP states outright that storage-rebate recipients from June 1, 2026 onward must take service under it.
The bulletin is the more recent and more specific document, and it is written for the installers who actually file rebate applications, so we treat it as operative. But ask Ameren to confirm the requirement in writing before you sign anything that depends on the rebate, and be aware that an installer working from the public page alone may not know about it.
An older requirement we previously listed as unresolved is now resolved — and it did not go away. Ameren's rebate tariff itself, Rider CGR (Sheet No. 59.004, unrevised since January 2023 and read in full on September 16, 2026), still says a residential storage-rebate recipient shall take service on Rider RTP, Rider PTR or Rider PSP, their approved successors, or, in the tariff's own words, "any other peak time rebate, hourly pricing, or time-of-use rate program" the Commission approves later. That forward-looking clause is what SD VPP slots into: the bulletin's enrollment requirement is the tariff's future-program clause being used, not a rule replacing it. The practical change is still real — with SD VPP as the qualifying program, you are no longer steered onto hourly pricing or Peak Time Rewards specifically, which is why the bulletin can say Basic Generation Service stays available.
One caveat survives. The "binding on future residents at the same address" language the Citizens Utility Board described in March 2026 does not appear in Rider CGR's text; it may live in the rebate application rather than the tariff. Ask Ameren in writing whether any address-level commitment attaches to an SD VPP-gated rebate before you sign.
How much are Ameren's solar and battery rebates?
For residential and small commercial customers — rate classes DS-1 and DS-2 — Ameren pays $300 per kW-DC on the smart inverter used to interconnect a generator such as solar, and $300 per kWh on the inverter used to connect an energy storage system. Larger commercial classes receive $250 in each case. These are one-time lump-sum rebates, paid within 60 days of a completed application once the system has permission to operate — per Rider CGR, Ameren's rebate tariff.
Swipe the table sideways to see every column →
| Rate class | Solar smart inverter | Energy storage | Who it applies to |
|---|---|---|---|
| DS-1 | $300 per kW-DC | $300 per kWh | Residential |
| DS-2 | $300 per kW-DC | $300 per kWh | Small general service |
| DS-3, DS-4 | $250 per kW-DC | $250 per kWh | Larger commercial — the classes Rider CGR lists as competitive service |
Ameren Illinois published rebate terms and Rider CGR (Sheet Nos. 59–59.005; rebate amounts last revised April 21, 2025), both read September 16, 2026 — amounts and the standalone-battery rule are unchanged since our last check. Systems cannot exceed 5,000 kW (Citizens Utility Board, March 2026, matching the statutory distributed-generation ceiling). Amounts are rebates on the inverter capacity, not on total project cost.
To put those figures in context: both rebates are meaningful, and both are contingent on requirements Ameren does not spell out on the same page as the amounts — which is the next section. Two adjacent facts worth having straight while you're here: these utility rebates plus Illinois Shines RECs are the state-level money that actually exists — Illinois has no state solar tax credit, despite what some guides claim. And battery pricing itself is a moving target right now: what the battery supply crunch means for Illinois pricing.
What are the requirements for Ameren's storage rebate?
Four, and only two of them appear on the page where the rebate amounts are listed. Taken together they rule out a large share of the people who go looking for a battery rebate in the first place.
- You must be an Ameren Illinois distribution customer on an eligible rate class. Rebates are tied to the rate class, and DS-1 covers residential.
- The storage must be charged by an on-site renewable generator. Ameren's terms state that any energy storage system included in a smart inverter rebate application must be charged by an on-site generator using a renewable resource, and Rider CGR defines the rebated storage as co-located with a private generation facility. A standalone battery does not qualify for the rebate — though, as noted above, it can still join the virtual power plant. Because Rider CGR's last revision predates the 2026 grid law, the standalone rebate that law directs is not yet written into Ameren's tariff.
- The system cannot exceed 5,000 kW, which is not a constraint any household will meet.
- Enrollment in the SD VPP program, per DER Bulletin 2026-04, effective June 1, 2026 — the requirement Ameren's own rebate page does not mention.
There is one further consequence worth knowing if you already have solar. If your system was interconnected before January 1, 2025 and you take a rebate on the generator, Ameren stops applying excess-generation credits to your delivery charges, while supply and transmission crediting continues. Taking a rebate on storage only does not trigger that. The crediting rules are set out on Ameren net metering.
Why does the battery rebate require solar?
Because Ameren's rebate is written around the inverter, not the battery. Its published terms state that any energy storage system included in a smart inverter rebate application must be charged by an on-site generator using a renewable resource. In plain terms: a standalone battery does not qualify. To claim $300 per kWh on storage, you need generation on the property — which for almost every Illinois home means rooftop solar.
This is the single most consequential fact on this page, and it is the one least likely to come up in a sales conversation about batteries. Someone reading about a virtual power plant paying homeowners for stored energy can reasonably conclude that a battery is the purchase to make. Under Ameren's rules, a battery on its own earns no rebate at all.
The order of operations therefore runs backwards from how most people approach it. Solar comes first, because it is what makes the storage rebate reachable — and sizing it against your actual usage is its own question: how many panels your home actually needs. Whether the battery then earns its place is the follow-on decision: is a home battery worth it in Illinois? Both are worth settling before you price anything.
Can you actually get Ameren's battery rebate?
Five questions decide it. Nothing you select is sent anywhere — this runs entirely in your browser.
1. Is Ameren your electric utility?
2. Do you own your home?
3. Do you have rooftop solar, or a system already planned?
4. Are you considering a home battery?
5. Where are you in the process?
Solar is the step that unlocks the rest. Ameren's storage rebate needs generation on the property, so whether your roof supports solar decides whether the battery rebate is even reachable. The eligibility check is free, takes about a minute, and tells you no when the answer is no.
Check my eligibility →You're in ComEd territory, which runs its own version. ComEd's Scheduled Dispatch VPP has published terms Ameren hasn't — including the rate it pays and the commitments attached to its battery rebate. Start with ComEd's virtual power plant explained, and if you want to know whether solar works on your roof, that check is free.
Check my eligibility →This reflects the rebate and program rules Ameren published as of September 16, 2026. It is not an application, not a decision, and not a substitute for confirming current terms with Ameren before you commit to anything. If you continue to our eligibility check, your answers come with you so you don't have to repeat them.
Every term, and where it comes from
For most of 2026 this table was mostly blank, because Ameren's rate book carried Sheet 68 as a placeholder. The rider text is now in the book and we have read it, so nearly every line below is sourced to the tariff itself rather than to a bulletin, a statute or ComEd's version.
Swipe the table sideways to see every column →
| Program term | What it is | Source |
|---|---|---|
| What it pays | $10.00 per kW of seasonal Performance, once per Program Year | Rider SD VPP, Sheet 68.004 |
| How Performance is measured | Average hourly kW output across every hour of the dispatch schedule, from the inverter or a utility device, in 15-minute intervals | Rider SD VPP, Sheets 68.001 and 68.003 |
| Dispatch window | 4–6 p.m. CPT weekdays, June 1–September 30 behind the meter; 4–7 p.m. front of meter | Rider SD VPP, Sheets 68.001 and 68.003 |
| Commitment length | Minimum 5 Program Summer Periods — a partial first season plus 4 more | Rider SD VPP, Sheet 68.002 |
| Deadline to be taking service | No later than March 1, 2027 for anyone rebated on or after June 1, 2026 | Rider SD VPP, Sheet 68 |
| Early exit | Voluntary participants only, effective December 31 of the notice year, and they may re-apply. No exit right stated for rebate-obligated participants | Rider SD VPP, Sheet 68.005 |
| Early-termination penalty | None stated anywhere in the rider | Rider SD VPP, read in full |
| Standalone battery eligible | Yes — the storage definition requires no paired generation. The rebate is the part that requires solar | Rider SD VPP, Sheet 68 and 68.001 |
| Battery rebate link | Storage rebate from June 1, 2026 onward makes participation mandatory | Rider SD VPP, Sheet 68; DER Bulletin 2026-04 |
| Effect on your supply | None — enrollment does not change your supply arrangement | DER Bulletin 2026-04 |
| Multiple batteries | Allowed; one participation agreement covers all storage at a premises | Rider SD VPP, Sheet 68.001 |
| Who gets paid | The participant, or a third party they designate in the agreement | Rider SD VPP, Sheet 68.004 |
| Program capacity cap | None stated | Rider SD VPP, read in full |
| Enrollment date and process | Still unpublished — run by Ameren with a contracted Program Administrator; no open enrollment as of September 16, 2026 | Rider SD VPP, Sheet 68.001; DER Bulletin 2026-04 |
| What happens if you sell the home | Still unpublished — the rider contains no transfer or sale provision | Rider SD VPP, read in full |
| Program lifespan | Ameren must file a successor VPP program by December 31, 2027; on Commission approval, due by December 31, 2028, all participants transition to it | Rider SD VPP, Sheet 68.005 |
Rider SD VPP, Ill. C.C. No. 1 Sheet Nos. 68–68.005, effective July 16, 2026, read in full September 16, 2026. Supporting documents read the same day: Ameren Illinois DER Bulletin 2026-04 and Rider CGR (Sheet Nos. 59–59.005). Statutory basis: Public Act 104-0458 amending Section 16-107.6(e) of the Public Utilities Act. Program-status context: Citizens Utility Board, "Upcoming CRGA Programs," September 14, 2026.
Two rows deserve emphasis because they are the ones most often reported wrong. There is no early-termination penalty in this tariff — not a reduced payment, not a clawback of the rebate, nothing. And there is no provision at all for what happens when a participant sells the home mid-commitment. The absence of a penalty is genuinely good news; the absence of a sale provision is an open question worth raising with Ameren in writing if you expect to move within five years.
Thinking about a battery? Start one step earlier.
Ameren's storage rebate needs solar on the property first. The eligibility check is free, takes about a minute, and if your roof isn't suitable it says so instead of booking you a sales call.
Check my eligibility →Does joining change my electricity supplier or my rate?
No, and Ameren is unusually direct about this. Its bulletin states that enrollment in the SD VPP program does not by itself change a customer's existing electric supply option, or automatically enroll them in or remove them from other demand response programs.
"It is not a supplier switch, retail rate change, or replacement for other demand response offerings."
Ameren Illinois, DER Bulletin 2026-04 — read in full September 16, 2026
In practice that means you can stay on Basic Generation Service, Real Time Pricing or Power Smart Pricing, and you remain eligible for Peak Time Rewards and Peak Time Savings. Participation is additive rather than a substitution.
That is a meaningful difference from ComEd's structure. ComEd's battery rebate requires the customer to take service under a Qualifying Utility Product — a family of hourly-pricing rates, of which Rate BESH is one option — and to keep a qualifying rate for the life of the energy storage facility, a permanent commitment attached to the equipment rather than a five-year one. What hourly pricing actually looks like day-to-day with solar on the roof is its own subject: ComEd Hourly Pricing with solar, explained. Ameren has no equivalent condition: Rider SD VPP imposes no supply-product requirement at all, and its own rebate tariff has always allowed any Commission-approved peak-time, hourly or time-of-use program to satisfy the obligation.
How does Ameren's program compare to ComEd's?
Now that both tariffs are readable, the answer is striking: on the virtual power plant itself they are nearly the same program. Same statute, same filing date, same rate, same five-season commitment, same December 31 exit for voluntary participants, same silence on penalties. The real divergence is in the rebate conditions attached to each.
Swipe the table sideways to see both columns →
| Ameren Illinois | ComEd | |
|---|---|---|
| Grid operator | MISO | PJM |
| Filed | June 1, 2026 (ERM #26-097) | June 1, 2026 |
| Tariff effective | July 16, 2026 | July 16, 2026 |
| Dispatch window | 4–6 p.m. weekdays, Jun–Sep | 4–6 p.m. weekdays, Jun–Sep |
| Service deadline | No later than March 1, 2027 | Anticipated March 1, 2027; spring 2027 launch target |
| What it pays | $10.00 per kW of Performance per Program Year | $10 per kW-Season |
| Program term | 5 Program Summer Periods | Five consecutive seasons |
| Early exit | Voluntary participants only, effective Dec 31 of notice year | Voluntary participants only, effective Dec 31 of notice year |
| Exit penalty | None stated | None stated |
| Battery rebate | $300/kWh | $300/kWh |
| Rebate supply condition | None — SD VPP imposes no supply-product requirement | Qualifying Utility Product (hourly pricing; Rate BESH is one option) for the life of the battery |
| Rebate requires solar? | Yes | Yes |
| Standalone battery can join the VPP itself? | Yes — the storage definition requires no paired generation | Yes — ComEd's tariff explicitly allows it; in both cases the rebate is the part that requires pairing |
| Net metering credit | Supply and transmission | Supply only |
Ameren figures: Rider SD VPP (Sheets 68–68.005), Rider CGR, DER Bulletin 2026-04 and Ameren's published rebate terms, all read September 16, 2026. ComEd figures, including its tariff's own "may be associated with" language on standalone eligibility, are drawn from its separately filed tariff and are provided for contrast only — they are not Ameren's terms. Full detail on ComEd's program is on our ComEd virtual power plant guide, and the ComEd rebate's conditions are on ComEd's battery storage rebate.
The decisive row is the rebate supply condition. A ComEd customer taking the battery rebate commits to a qualifying hourly-pricing product for the life of the battery — a permanent commitment attached to the equipment. An Ameren customer taking the same rebate commits to five summer periods of dispatch and keeps whatever supply arrangement they already have. Add Ameren's broader net metering credit, which covers supply and transmission where ComEd's covers supply only, and on the full published record Ameren's version is the less demanding of the two.
Is this the same as Ameren's thermostat program?
No, and search results conflate them constantly. Ameren has had a residential demand-response program built around smart thermostats since 2024, run through third-party partners. Rider SD VPP is a separate, newer program built around home batteries, created by the 2026 grid law, with service beginning no later than March 1, 2027 for rebate-obligated customers.
The practical difference is what gets dispatched. A thermostat program adjusts your cooling for a couple of hours. A battery program draws stored electricity from equipment you own. They pay differently, they enroll differently, and being in one does not put you in the other — Ameren states that SD VPP enrollment does not automatically add or remove you from other demand response programs.
If you are trying to compare what each is worth, Peak Time Rewards' credit resets every spring — $1.05 per kWh reduced during called events was the published rate for the March–May 2026 season, per Ameren's own rate sheet. The two pay on completely different bases: Peak Time Rewards pays per kilowatt-hour you avoid using during a called event, while SD VPP pays $10.00 per kilowatt of average output your battery delivers across an entire season. You can hold both.
When does it start, and how do I enroll?
The tariff sets the outside date: rebate-obligated customers must be taking service no later than March 1, 2027. What Ameren still has not published is the enrollment mechanism — the rider says participation is administered by Ameren with a contracted Program Administrator, and as of September 16, 2026 there is no open enrollment and no published sign-up process. The Citizens Utility Board reported on September 14, 2026 that Ameren's program launch remains to be scheduled, in contrast to ComEd's stated spring 2027 target.
What is worth doing now depends on where you are. If you already have solar and are weighing a battery, the rebate rules are live and the enrollment requirement applies to your application — confirm the current terms with Ameren directly before you commit. If you do not have solar, the battery rebate is not available to you regardless of when the program opens, so the useful first step is finding out whether solar works on your roof.
Check any virtual power plant payment you are quoted against the tariff. The rate is $10.00 per kW of seasonal Performance, paid annually — a modest credit, not a payback driver. A sales estimate presenting VPP income as a meaningful share of your return is not describing this program. If a quote is already in your hands, run it through our pre-signature checklist — and if you're financing, compare the cash and loan prices while you're at it, because the gap between them is a dealer fee.
Our commitment: we update this page whenever Ameren opens enrollment, publishes the participation agreement, or revises the rider — and we will say plainly what changed. The rider's own terms were added here the day we were able to read them at the tariff.
Terms used on this page
Utility filings use vocabulary that rarely appears anywhere else. These are the terms that matter for understanding what Ameren has and has not committed to.
- Rider SD VPP
- Ameren Illinois' Scheduled Dispatch Virtual Power Plant tariff — the document that sets the rules and payment for the battery program. It occupies Sheet Nos. 68 through 68.005 of Ameren's Illinois rate book, took effect July 16, 2026, and was read in full for this page on September 16, 2026.
- Performance
- The tariff's unit of payment: the sum of your battery's average hourly kilowatt output across each hour of the dispatch schedule, divided by the total hours in that schedule. Compensation is $10.00 per kilowatt of Performance per Program Year.
- Program Summer Period
- Each weekday from June 1 through September 30, with dispatch from 4 to 6 p.m. Central Prevailing Time for behind-the-meter systems. Five of these is the minimum commitment.
- Program Year
- June 1 through May 31 — the period against which Performance is settled and compensation paid. The first Program Year may be shorter than twelve months.
- Program Administrator
- The third-party entity Ameren contracts to run the program, execute participation agreements and handle dispatch. Ameren has not named it publicly.
- Rider CGR
- Ameren Illinois' Customer Generation Rebate tariff — Sheet No. 59 of its Illinois tariff, the document that actually sets the $300 and $250 rebate amounts, the 60-day payment term and the storage recipient's rate-program obligation. Its rebate amounts were last revised April 21, 2025, before the 2026 grid law.
- Energy storage system (ESS)
- The term Ameren's rebate documents use for a home battery. Ameren's rebate is calculated on the inverter connecting the storage, at $300 per kWh for residential customers.
- Smart inverter rebate
- Ameren's one-time rebate on the inverter used to interconnect a generator or storage system — $300 per kW-DC for solar and $300 per kWh for storage on residential rate classes.
- DER Bulletin
- A numbered notice Ameren issues to distributed-energy trade allies. Bulletin 2026-04 is the document establishing the SD VPP enrollment requirement for storage rebates as of June 1, 2026.
- ERM filing
- An electronic rate-matter filing at the Illinois Commerce Commission. Ameren's Rider SD VPP filing is ERM #26-097, submitted June 1, 2026.
- "Do Not Suspend the Filing"
- A Commission disposition meaning it has chosen not to suspend a tariff, allowing it to take effect on the utility's requested date. It is not an affirmative approval order.
- Dispatch window
- The hours during which the utility may draw on an enrolled battery. Ameren's is 4 to 6 p.m. on weekdays, June through September, for behind-the-meter residential systems.
- Basic Generation Service (BGS)
- Ameren's default electricity supply, used by customers who have not chosen an alternative supplier or a time-based rate. SD VPP enrollment does not change it.
- Peak Time Rewards
- Ameren's existing demand-response programme, paying a bill credit per kilowatt-hour reduced during called events. It remains available alongside SD VPP.
- Qualifying Utility Product (QUP)
- The rate condition ComEd attaches to its own battery rebate: recipients must take service under a qualifying hourly-pricing product — Rate BESH is one option, not the only one — for the life of the energy storage facility. Ameren has published no equivalent requirement.
Ameren virtual power plant and rebate FAQ
What is Ameren's Rider SD VPP?
It is Ameren Illinois' Scheduled Dispatch Virtual Power Plant, a program that pays customers to let Ameren draw on their home batteries between 4 and 6 p.m. on weekdays from June through September. It was created under Public Act 104-0458, took effect as a tariff on July 16, 2026, and pays $10.00 per kilowatt of seasonal Performance per year. Customers who took Ameren's storage rebate on or after June 1, 2026 must be taking service under it no later than March 1, 2027.
How much is Ameren's battery rebate?
$300 per kWh for residential and small commercial customers on rate classes DS-1 and DS-2, and $250 per kWh for larger commercial classes. On a 13.5 kWh home battery that is roughly $4,050. The rebate is calculated on the inverter connecting the storage, not on total project cost.
How much is Ameren's solar rebate?
$300 per kW-DC on the smart inverter used to interconnect a generator, for residential and small commercial rate classes DS-1 and DS-2. On a 10 kW-DC array that is roughly $3,000. Larger commercial classes receive $250 per kW-DC.
What are the requirements for Ameren's storage rebate?
You must be an Ameren Illinois distribution customer on an eligible rate class, the storage must be charged by an on-site renewable generator, the system cannot exceed 5,000 kW, and per DER Bulletin 2026-04 you must enroll in the SD VPP program. That last requirement does not appear on Ameren's customer-facing rebate page.
Do I have to join the VPP to get Ameren's battery rebate?
Ameren's DER Bulletin 2026-04 states that as of June 1, 2026, energy storage rebate eligibility is linked to participation in a utility-managed virtual power plant program and that customers must enroll in an SD VPP program to be eligible. Ameren's customer-facing rebate page does not mention this requirement, so confirm it with Ameren in writing before relying on the rebate.
Can I get Ameren's battery rebate without solar?
No. Ameren's published terms state that any energy storage system included in a smart inverter rebate application must be charged by an on-site generator using a renewable resource. A standalone battery does not qualify, so generation on the property is a precondition for the $300 per kWh storage rebate.
How much does Ameren's virtual power plant pay?
$10.00 per kilowatt of Performance, paid no later than the end of each Program Year, per Rider SD VPP Sheet 68.004. Performance means your battery's average hourly kilowatt output across every hour of the dispatch schedule, so it rewards consistent output across the whole season rather than nameplate size. Illinois law sets $10 per kW as a floor; Ameren did not go above it, and neither did ComEd.
How long am I committed to Ameren's virtual power plant?
A minimum of five Program Summer Periods, beginning at your individual enrollment date. If you enroll partway through a summer, the tariff counts that partial period plus the four following ones. Joining mid-season also dilutes that year's payment, because hours before your service began count as zero while still being included in the denominator.
Can I leave Ameren's virtual power plant early, and is there a penalty?
Only voluntary participants have a stated exit right: they can notify Ameren and termination takes effect on December 31 of that year, with the ability to re-apply later. Customers who joined as a condition of the battery rebate have no exit right stated in the rider. Notably, the tariff contains no early-termination penalty, clawback or buy-out figure of any kind.
Do I need solar to join Ameren's virtual power plant?
No. Rider SD VPP defines an Eligible Energy Storage System without requiring paired generation — it must be fixed in place, sited on your premises, and either separately metered or able to communicate smart-inverter data. A standalone battery can participate. Solar is required for the $300 per kWh rebate, which is a different tariff, and that distinction is where most coverage of this program goes wrong.
When does Ameren's virtual power plant start?
The tariff requires customers rebated on or after June 1, 2026 to be taking service no later than March 1, 2027. Enrollment is not open as of September 16, 2026 and Ameren has not published a sign-up process beyond stating that the program is administered by Ameren with a contracted Program Administrator, so there is nothing to sign up for yet.
Does joining change my electricity supplier or rate?
No. Ameren states that enrollment does not by itself change your existing electric supply option and is not a supplier switch, retail rate change, or replacement for other demand response offerings. You can remain on Basic Generation Service, Real Time Pricing or Power Smart Pricing.
Do I still have to switch to hourly pricing or Peak Time Rewards to get Ameren's battery rebate?
Not specifically. Rider CGR, Ameren's rebate tariff, still says a residential storage-rebate recipient shall take service on Rider RTP, Rider PTR or Rider PSP — or any other peak time rebate, hourly pricing or time-of-use program the Commission approves later. SD VPP is that later program, which is why DER Bulletin 2026-04 makes SD VPP enrollment the requirement while confirming you can stay on Basic Generation Service. The March 2026 Citizens Utility Board fact sheet describing a binding three-way choice reflects the pre-June-2026 practice.
Can I still use Peak Time Rewards if I join?
Yes. Ameren states that SD VPP enrollment does not automatically enroll you in or remove you from other demand response programs, and that customers may remain eligible for Peak Time Rewards and Peak Time Savings. Participation is additive.
How is Ameren's program different from ComEd's?
Both filed on June 1, 2026 under the same statute, with identical dispatch windows and the same 2027 target. The differences are that ComEd has published its rate and term while Ameren has not, ComEd's battery rebate requires a Qualifying Utility Product — an hourly-pricing rate, of which Rate BESH is one option — for the life of the battery while Ameren has published no equivalent condition, ComEd's own tariff allows a standalone battery into its dispatch program even though its rebate still requires solar, and Ameren credits both supply and transmission for excess solar generation where ComEd credits supply only.
Is this the same as Ameren's thermostat program?
No. Ameren has run a residential thermostat demand-response program since 2024 through third-party partners. Rider SD VPP is a separate battery program created by the 2026 grid law. Being in one does not enroll you in the other.
What times can Ameren use my battery?
Between 4 and 6 p.m. on weekdays, June through September, for behind-the-meter residential systems. Community solar and other front-of-meter resources have a window of 4 to 7 p.m. over the same months.
Has Ameren published the Rider SD VPP tariff text yet?
Yes. The full rider occupies Sheet Nos. 68 through 68.005 of Ameren's Electric Service Schedule Ill. C.C. No. 1, filed June 1, 2026 under ERM #26-097 and effective July 16, 2026. For most of 2026 that sheet was a "For Future Use" placeholder in the published rate book, which is why earlier coverage — including earlier versions of this page — reported the terms as unavailable. We read the full text on September 16, 2026.
What happens to Ameren's SD VPP program after five years?
The rider requires Ameren to file a successor virtual power plant program under Section 16-107.9 of the Public Utilities Act by December 31, 2027, with Commission approval due no later than December 31, 2028. On approval, every customer served under SD VPP is transitioned into that new program. The terms described on this page are the current deal, not guaranteed for the full five years.
Was Ameren's virtual power plant approved by the ICC?
Not by an approval order in the formal sense. Ameren's filing, ERM #26-097, appeared as Agenda Item E-3 at the Illinois Commerce Commission's Regular Open Meeting on June 24, 2026, where the disposition was "Do Not Suspend the Filing" — the Commission declined to suspend the tariff, which let it take effect on July 16, 2026. Some secondary sources, including the Citizens Utility Board and an industry tracker from the Smart Electric Power Alliance, describe this same action more loosely as the ICC having "approved" the tariff.
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Sources
- Ameren Illinois — Rider SD VPP, Scheduled Dispatch Virtual Power Plant (Ill. C.C. No. 1, Sheet Nos. 68–68.005), filed June 1, 2026 under ERM #26-097, stamped "FILED WITHOUT SUSPENSION" by Commission action June 24, 2026, effective July 16, 2026 — read in full September 16, 2026 in Ameren's Electric Service Schedule. The source for the $10.00 per kW Performance rate, the five-summer-period commitment, the December 31 exit right for voluntary participants, the March 1, 2027 service deadline, the standalone-storage eligibility and the successor-program transition
- Ameren Illinois — DER Bulletin 2026-04 (read in full, reconfirmed September 16, 2026) — the dispatch window, the 2027 target, the storage-rebate enrollment requirement effective June 1, 2026, and the statement that SD VPP does not change a customer's supply option
- Ameren Illinois — customer-owned solar, rebates and net metering (checked September 16, 2026) — the $300/kW and $300/kWh rebate amounts, the on-site renewable generation requirement for storage, and the post-2025 crediting rules, all unchanged since our last check
- Ameren Illinois — Rider CGR, Customer Generation Rebate (Ill. C.C. No. 1 Sheet Nos. 59–59.005) (read in full September 16, 2026) — the rebate amounts by service class, the 60-day payment term, the storage recipient's rate-program obligation including its forward-looking "any other peak time rebate" clause, and the delivery-credit protection for storage-only rebates
- Ameren Illinois — Ill. C.C. No. 1 tariff table of contents (checked September 16, 2026) — names Sheet No. 68 "Rider SD VPP," marked as a change in the filing effective July 16, 2026
- Citizens Utility Board — "Upcoming CRGA Programs" (September 14, 2026) — confirms the ICC's June action on both utilities' SDVPP tariffs and that Ameren's launch date is still to be determined, distinct from ComEd's stated spring 2027 target
- Citizens Utility Board — solar and storage rebates in Illinois (March 2026) — independent summary of both utilities' rebate terms and the 5,000 kW system limit
- Illinois Commerce Commission — filing ERM #26-097, Ameren Illinois, filed June 1, 2026, effective July 16, 2026; Ill. C.C. No. 1 Sheet No. 68 and Original Sheet Nos. 68.001–68.005; Agenda Item E-3, Regular Open Meeting of June 24, 2026, disposition "Do Not Suspend the Filing"
- Public Act 104-0458, the Clean and Reliable Grid Affordability Act, enacted January 8, 2026, amending Section 16-107.6(e) of the Illinois Public Utilities Act — the statutory basis for the program and the minimum compensation floor
How to cite this page: The Day Company, "How does Ameren's virtual power plant program work?", theday.company/answers/ameren-virtual-power-plant, last reviewed September 16, 2026.
Changelog: August 2026 — v1 published. August 8, 2026 — v3: corrected the description of ComEd's rebate rate condition to the Qualifying Utility Product framing (Rate BESH is one qualifying option, not the requirement itself), added a share row, reading-progress bar and mobile CTA, linked the sizing, battery-worth-it, state-tax-credit, battery-supply, quote-vetting, dealer-fee and hourly-pricing guides, and pointed the Peoria related-answer card to the published solar-panels-peoria-il guide. September 16, 2026 — v4: re-verified every published fact at primary sources, read Rider CGR in full, and resolved the open question about the older rate-program requirement. September 16, 2026 — v5: Ameren's Rider SD VPP tariff text became available and we read it in full. Every term this page previously listed as unpublished is now sourced to the tariff: the $10.00 per kW Performance rate, the five-summer-period commitment, the December 31 exit right for voluntary participants only, the absence of any early-termination penalty, the March 1, 2027 service deadline for rebate-obligated customers, standalone-storage eligibility for the program itself, and the successor-program transition due by the end of 2028. Two new sections added on what it pays and what you commit to, with verbatim tariff quotes; the Ameren/ComEd comparison completed; five FAQs added; SEO title and description rewritten to match the published terms.
Update triggers: this page is revised whenever Ameren opens enrollment, publishes the SD VPP Participant Agreement, names its Program Administrator, revises the rider, files the successor program due by December 31, 2027, or reconciles the gap between DER Bulletin 2026-04 and its customer-facing rebate page.