Solar Answers → Incentives & Programs
What battery incentives can Illinois homeowners actually get in 2026?
One battery incentive actually exists in Illinois in 2026: the utility rebate — $300 per kilowatt-hour of battery capacity from ComEd or Ameren, for storage paired with solar and a smart inverter. The catch is the required rate: ComEd requires Hourly Pricing (Rate BESH); Ameren requires Peak Time Rewards, Rider RTP, or Rider PSP — a choice that binds your address. The federal residential credit expired December 31, 2025.
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How much is the Illinois battery rebate worth?
$300 per kilowatt-hour of your battery's nameplate capacity (DC rating), from your utility, one time. CUB's example: an 8 kWh battery earns $2,400. A common ~13.5 kWh home battery works out to about $4,050. The battery must be paired with a qualifying renewable generating system — typically solar — with a smart inverter installed and operating. The rebate exists under Illinois law (220 ILCS 5/16-107.6).
| Battery (storage) rebate, 2026 | ComEd | Ameren Illinois |
|---|---|---|
| Amount | $300/kWh of battery nameplate capacity (DC) | $300/kWh of battery nameplate capacity (DC) |
| Pairing requirement | Installed alongside a qualifying renewable generating system, smart inverter in operation | Same — and Ameren states the battery must be charged by an on-site renewable generator; standalone batteries don't qualify |
| Required electric service | Hourly Pricing (Rate BESH) | One of three: Peak Time Rewards, Rider RTP, or Rider PSP — binding on the address |
| Community solar | Storage-rebate customers cannot also hold a community-solar subscription, per ComEd's tariff | No equivalent restriction stated in CUB's sheet |
| Effect on pre-2025 legacy netting | None. Taking the storage rebate does not end legacy full netting — only the generation rebate does (both utilities, per CUB) | |
| Who receives it | The owner of the equipment, under Illinois law — on a lease or PPA, check your contract for who that is | |
Companion fact for context: the solar side of the same program pays $300 per kW of generating capacity — the full incentive stack lives on our incentives guide. This page is about the battery.
What rate do you have to switch to — and what does it commit you to?
This is the fine print that decides whether the rebate is free money or a bad trade. Both utilities condition the battery rebate on your electric service. ComEd requires Hourly Pricing (Rate BESH), where your supply price changes hourly with the market. Ameren requires one of three options — and CUB states that choice is binding on the current customer and all future residential customers at that address.
Read this twice if you're in Ameren territory. The rate election attached to Ameren's battery rebate binds the address, not just you — every future resident inherits it, per CUB's March 2026 fact sheet.
And the Peak Time Rewards path has its own lock: selecting PTR means you and any successor customers at the residence can't participate in similar demand-response programs offered by third parties in the future.
| Ameren's three qualifying options | What it is |
|---|---|
| Peak Time Rewards (PTR) | Ameren's demand-response program — bill credits for cutting usage during peak events. CUB calls it a limited rewards program with no additional cost, and notes you can add PSP later. The third-party demand-response lockout above applies. |
| Real Time Pricing (Rider RTP) | Supply service priced on MISO day-ahead hourly prices. If you're on Rider NM, those hourly prices also set the compensation for your exported generation. |
| Power Smart Pricing (Rider PSP) | Same day-ahead hourly pricing and crediting structure as RTP, plus enhanced customer service and education, for a monthly fee — currently $2.25. |
CUB's advice, which we'll simply repeat: make sure the rate actually fits your household's usage pattern before taking the rebate, and talk to a rate specialist first — ComEd's Hourly Pricing line is 1-888-202-7787; Ameren's Power Smart Pricing line is 1-888-596-5498. An hourly rate plus a battery that shifts usage into cheap hours can compound nicely; an hourly rate on a household with rigid peak-hour usage can backfire.
And for ComEd homes, the required rate carries a documented upside of its own: on Hourly Pricing, ComEd's published mechanics allow a large enough credit balance to cover an entire bill — the exception explained here. A battery that shifts usage into cheap hours while exports earn at high-priced ones is exactly the pairing that structure rewards — no promises, just the mechanics.
Does the battery earn Illinois Shines money or a federal credit?
Mostly no — which is exactly why the rebate matters. Illinois Shines pays for renewable energy credits, and a REC represents a megawatt-hour of generation: your solar earns them, your battery doesn't. On the federal side, the residential credit (§25D) expired December 31, 2025 and can't be claimed on cash or loan purchases in 2026 — batteries included.
Third-party-owned structures (lease/PPA) are the narrow exception: storage's federal treatment there depends entirely on how the project is structured and who owns it. If any quote claims a federal credit on storage in 2026, ask for it identified by code section, in writing, before you sign. For the full picture of what expired and what didn't: did the solar tax credit end?
Net: for an Illinois homeowner buying in 2026, the $300/kWh utility rebate is the battery incentive. Everything else attaches to the solar.
Which rebate ends legacy net metering — and which doesn't?
The distinction CUB draws is precise, and it applies at both utilities: taking the generation rebate on a pre-2025 system ends full-retail netting permanently. Taking only the storage rebate does not. If you installed before 2025 and hold full netting, a battery is the one piece of this program you can take without touching that status.
That makes the clean play for legacy owners: battery rebate yes, generation rebate only after running the math on what full netting is worth over your system's remaining life. The utility-specific traps — including Ameren's second way to lose legacy status — are covered in the netting explainers: ComEd · Ameren Illinois.
Why do batteries pencil better under the 2026 rules?
Because supply-only netting changed what an exported kilowatt-hour is worth. Systems interconnected on or after January 1, 2025 earn credits on the supply side only — so solar you export is worth less than solar you use. A battery converts midday exports into evening self-consumption, which is exactly the arbitrage the new rules reward.
- Self-consumption is the whole game: stored solar used at 7pm avoids the full cost of a kilowatt-hour; exported solar earns the narrower supply credit.
- The required hourly rates cut both ways — charge when power is cheap or sunny, discharge when it's expensive. Whether that nets positive depends on your usage pattern, not a brochure.
- No payback promises here, ever. Battery economics depend on your rate, usage shape, battery size, and how you operate it. Ask any bidder for their assumptions — rate path, cycling, self-consumption share — not their conclusion.
What does a battery actually do in an outage?
It's the only thing that keeps your lights on — standard grid-tied solar shuts off during an outage, even in full sun. That's anti-islanding, a required safety function protecting utility line workers. Backup requires a battery (or islanding-capable hardware) with a transfer arrangement isolating your backed-up circuits from the grid.
Size the goal honestly: a typical home battery — commonly ~10–15 kWh — runs selected essential circuits for hours, not the whole house for days. If backup is why you're buying, say so at design time and get a load-by-load backup plan in the quote; it changes the equipment list. And note the rebate boundary: a standalone battery with no solar doesn't qualify — Ameren is explicit that a rebated battery must be charged by an on-site renewable generator.
How do you actually claim the rebate?
Under Illinois law, the owner of the generator, battery, and inverter applies for and receives the rebate. Own the system with cash or a loan and that's you. On a lease or PPA, the third party typically owns the equipment — so check the contract for who claims the rebate and whether any of it reaches your pricing.
- Before you sign: confirm in the contract who files the rebate application and who receives the payment.
- Confirm the rate change: the battery rebate isn't approved without the qualifying service — get the enrollment handled and documented.
- Smart inverter, in operation: the qualifying equipment for the whole program. One inverter can serve both the solar and the battery, per Ameren.
- After energization: CUB reports ComEd's rebate arrives as a one-time check within about 90 days of the system being energized.
Illinois battery incentive FAQ
How much is the Illinois battery rebate in 2026?
$300 per kilowatt-hour of the battery's nameplate capacity in DC rating, paid once by ComEd or Ameren Illinois. CUB's example: an 8 kWh battery earns $2,400. The battery must be paired with a qualifying renewable generating system and a smart inverter.
Do I have to change my electric rate to get the battery rebate?
Yes. ComEd requires enrollment in Hourly Pricing (Rate BESH). Ameren requires one of three options — Peak Time Rewards, Rider RTP, or Rider PSP — and CUB states that choice binds the current customer and all future residential customers at that address.
Can I get the rebate for a battery without solar?
No. The storage rebate applies to batteries installed alongside a qualifying renewable generating system, and Ameren states a rebated battery must be charged by an on-site renewable generator. A standalone battery doesn't qualify under the current program.
Does taking the battery rebate end legacy full net metering?
No. Per CUB, customers who installed before January 1, 2025 and hold full netting do not lose that status by taking the storage rebate — only the generation rebate ends it. That applies at both ComEd and Ameren Illinois.
Does a battery earn Illinois Shines RECs?
No. Illinois Shines pays for renewable energy credits, and a REC represents a megawatt-hour of generation — the solar earns them, the battery doesn't. The $300/kWh utility rebate is the battery's incentive.
Is there a federal tax credit for home batteries in 2026?
Not for cash or loan purchases — the federal residential credit (§25D) expired December 31, 2025. Storage in third-party-owned structures depends on how the project is structured; ask for any claimed credit identified by code section, in writing.
Who receives the rebate on a lease or PPA?
Illinois law specifies the owner of the equipment applies for and receives the rebate. On a lease or PPA the third party typically owns the system — your contract determines who claims it and whether any value reaches your pricing.
Can I have community solar and the ComEd battery rebate?
No — per ComEd's tariff, customers who receive a battery storage rebate cannot also participate in a community-solar offer. If you hold a community-solar subscription, factor canceling it into the battery decision.
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Sources
- CUB — Solar and Storage Rebates in Illinois fact sheet (March 2026, PDF)
- ComEd — Solar Rebates
- ComEd Hourly Pricing — About · Hourly Pricing — Solar
- Ameren — Customer-Owned Solar (rebate rules, ownership, pairing requirement)
- Ameren Illinois — Rebate Application (PDF)
- Illinois Shines — DG Disclosure Form guide
- Illinois Shines — Consumer FAQs
- IRS — FAQs on P.L. 119-21 (§25D expiration)