Solar Answers → Bills & Net Metering

What are Base Power and Energywell offering Illinois homeowners?

If your ComEd bill has climbed and someone has pitched you a free or nearly free home battery, the offer is real and so are the savings — both companies price their electricity below ComEd's, and neither asks you to buy the battery. What the sales material tends to skip is what you are agreeing to in return, and for how long. This page lays out both offers side by side from the contracts themselves, and links those contracts so you can read them yourself.

The Day Company is not affiliated with, endorsed by, or a partner of Base Power, Energywell, Think Energy, ComEd, or the Citizens Utility Board. Company names are used only to identify the offers described. We are an Illinois solar and battery information resource and a lead-generation business, which means we have a commercial interest in rooftop solar — a product these offers are not compatible with. Every figure below is attributed to a named public document and dated, and the contract documents we quote are linked so you can check them yourself.

Published August 3, 2026 · Last reviewed September 15, 2026 · Facts re-verified at primary sources, including both companies' own contract documents and ComEd's current rate book · By The Day Company Editorial Team

What exactly are these offers?

They are two things sold as one: a battery and an electricity plan. The company installs a whole-home battery at your house, keeps ownership of it, and enrolls you as a customer of its own alternative retail electric supplier plan. You pay little or nothing for the hardware; the company earns by supplying your power and by using the battery's stored energy to serve the grid when demand peaks.

Both companies are compensated under Illinois' Clean and Reliable Grid Affordability Act, which pays for battery storage that helps balance the grid. The Citizens Utility Board explains the economics plainly: these companies charge the batteries when power is cheap and supply stored energy back when the grid is strained, and that grid service earns revenue that funds the discounted rates and free or low-cost installations. One thing worth knowing up front: no ComEd program pays anyone for battery dispatch yet — ComEd's own virtual power plant doesn't start until 2027 — so today, both companies' published Illinois revenue is the supply plan itself. The charging rules below explain how that works and why it matters.

Two companies are doing this in Illinois as of September 2026 — Base Power, based in Austin, Texas, which launched in Illinois in June 2026 and reports serving more than 30,000 homes company-wide, and Energywell, based in Greens Farms, Connecticut, whose Illinois supplier entity is Fanfare Energy, LLC and whose offer is marketed through the Think+ Energy Advisor network. Both operate in ComEd territory only. A third company runs a similar bundle in Texas. The closest new arrival in Illinois is SOLRITE Energy, which launched August 20, 2026 with a different structure: it installs company-owned solar panels plus a 60 kWh battery and sells you the solar output under a 25-year agreement, rather than pairing a battery with a supply plan.

How do Base Power and Energywell compare?

The table below sets the two offers side by side as re-verified September 15, 2026. The headline rates are close; the commitments are not.

Swipe the table sideways to see both columns →

Sources: Citizens Utility Board Q&A on battery and electricity supply offers, July 22, 2026; Base Power published Illinois rates (as of June 15, 2026, re-checked September 15, 2026) and Illinois Battery Services Agreement dated May 4, 2026; Energywell Battery Service Agreement version 20260624 — both read in full September 15, 2026; Energywell's Illinois rate pages re-checked the same day. Rates compared against ComEd's Price to Compare of 10.399¢/kWh, effective June 1 through September 30, 2026.

The single largest difference in that table is the bottom of the cancellation column. Both companies charge $500 if you end the agreement and give the battery back. If you end it and keep the battery — or fail to surrender it within 90 days — Base charges fair market value, an amount its own contract says may exceed $10,000 per battery, while Energywell's fee schedule names a flat $15,000.

What do you actually pay for electricity?

Both plans are time-of-use, not flat rates, and both are priced against ComEd's Price to Compare rather than against each other. Base publishes cents: 7.8¢ per kWh on-peak and 7.6¢ off-peak, unchanged since June 15, 2026. Energywell publishes a discount instead: 25% below ComEd's Price to Compare on-peak and 28% off-peak, excluding the monthly Purchased Electricity Adjustment.

Base now publishes its own Illinois rate history, which settles what "rates changed once already" means in numbers:

Base Power published Illinois rate history, accessed September 15, 2026 (last updated by Base June 15, 2026). The one change so far was downward. Historical pricing is not indicative of future pricing — Base's own caveat, and ours.

For context, ComEd's Price to Compare is 10.399¢ per kWh from June 1 through September 30, 2026, which is what makes both offers land around 25% lower today. That comparison is not fixed. ComEd's supply rate resets on October 1, 2026, and a percentage-based discount moves with it while a fixed cent rate does not. One more wrinkle from Base's own material: it advertises that members pay no Purchased Electricity Adjustment. The PEA is a ComEd supply-side true-up, so it stops applying whenever you leave ComEd's default supply — under either of these offers. The practical difference is in the benchmark: Energywell's percentage discount is computed against the Price to Compare excluding the PEA, so the PEA neither helps nor hurts its math.

The Citizens Utility Board makes a point worth repeating here, because it cuts in these companies' favour: most alternative supplier plans in Illinois have not saved residential customers money, and these two are unusual in guaranteeing savings against ComEd's price at all. That is a real distinction from the alternative-supplier offers Illinois consumers have historically been warned about.

What the guarantee covers is the supply portion of your bill. Delivery charges, the customer charge and taxes are billed by ComEd regardless of who supplies your power, so a 25% supply discount is not a 25% bill discount. If you want the anatomy of a ComEd bill line by line, that is on why is my ComEd bill so high.

Who owns the battery, and where does it go?

Neither company sells you the battery — both keep it. Base installs its own Base Core unit, 39.2 kWh in the single configuration, outside the home. Energywell installs an EcoFlow OCEAN Pro, up to 40 kWh across multiple units, and states on its own site that the system is fully outdoor-rated. In both cases the company owns, operates, maintains and remotely dispatches the hardware for the life of the agreement, and both say they cover repair or replacement if it fails.

Ownership carries one consequence most pitches never mention: the incentives on the battery belong to the company, not to you. Base's Illinois contract states it plainly — Base "is entitled to any and all tax credits, rebates, incentives (including, without limitation, the Distributed Generation Rebate program administered by the relevant utility)... and you shall have no right, claim, or entitlement to any such benefits." That includes ComEd's $300-per-kWh battery storage rebate, which Illinois law pays to the equipment's owner. Whether a bundle battery even qualifies is its own question — ComEd's published storage-rebate terms, as they read today, require the battery to be charged by an on-site renewable generator, which a grid-charged standalone battery is not — but the contract settles who would collect any incentive that applies: the company, never you. On a 39.2 kWh unit the storage rebate computes to about $11,760. Energywell's agreement reserves incentives the same way, and goes further: it claims all tax credits, rebates and incentive payments arising from its ownership of the battery, expressly including programs established or expanded after your system is installed. That isn't hidden money taken from you; it's part of how a near-free battery is funded. But if you're comparing these offers against owning a battery yourself — what that costs, and when it earns its place — that comparison is on is a home battery worth it in Illinois, and the rebate sits on the ownership side of that ledger.

That ownership structure is why the offers can be nearly free at the door, and it is also why the cancellation terms look the way they do. You are hosting equipment, not buying it.

On backup: both batteries can power your home during an outage, but neither company guarantees the battery will be charged when you need it. Because the battery is dispatched to serve the grid, its state of charge varies. Base's contract says it will "endeavor" to keep at least 5 kWh in reserve — and in the same paragraph says that reserve "cannot be guaranteed." Base's plan materials put typical backup at 12 to 18 hours at average usage, up to 36 at low usage. Both contracts disclaim guaranteed backup, and both bar relying on the system for medical or life-critical equipment. If uninterrupted power matters for a medical device, neither of these offers — nor rooftop solar with storage — should be treated as a substitute for a dedicated backup plan.

What are you actually signing up for?

Two agreements, running on different clocks — and now both companies' battery contracts are public, so this section no longer leans on secondhand summaries. Base's battery commitment runs 12 years from the day you pay the deposit, per its own Battery Services Agreement. Energywell's runs 15. The supply plans run in shorter cycles inside those windows — but as Base's contract makes explicit, staying enrolled in the company's supply plan is a condition of the battery agreement for its entire term.

Commitment lengths as re-verified September 15, 2026, from each company's own battery contract, both read in full that day. Energywell's initial supply term is drawn at five years per the Citizens Utility Board and Energywell's national rates page; Energywell's own Illinois page states the retail agreement "begins on a 2-year term and renews periodically" — the conflict is unresolved and noted below. Base's supply plan runs 24-month cycles, but its Battery Services Agreement requires continuous enrollment in Base Retail's plan for the full 12 years.

Swipe the table sideways to see both columns →

Sources: Base Power Illinois Battery Services Agreement (dated May 4, 2026), read in full September 15, 2026; Energywell Battery Service Agreement fee schedule and Section 9; Citizens Utility Board Q&A, July 22, 2026.

One conflict we could not resolve, and will not paper over. Energywell's initial supply term is stated as five years by the Citizens Utility Board and on Energywell's national rates page, but Energywell's own Illinois page — re-checked September 15, 2026 — states the retail energy agreement "begins on a 2-year term and renews periodically." Those cannot both be right. The controlling document is whichever agreement the company puts in front of you — ask which term applies and get the answer in the contract, not in an email.

A second thing worth knowing before you compare price tags: Base's Illinois page shows the install fee as $695 struck through down to $95. The $695 is Base's standard fee in Texas. Base's own Illinois announcement puts the standard Illinois fee at $295 once the first 2,000 customers are through.

What else is inside Base's contract that the marketing doesn't mention?

Base now publishes its full Illinois agreement stack — seven documents, including the Battery Services Agreement. We read it end to end again on September 15, 2026. None of what follows is secret; all of it is the kind of term you'd want to know before a 12-year signature, and some of it genuinely runs in the customer's favor.

• You can't switch suppliers mid-term. Cancelling the Base Retail supply plan, dropping the Net Metering Addendum, or joining a municipal aggregation program is deemed an Early Termination of the battery agreement (§C.4). The narrow exception: if, at a renewal, Base Retail fails to offer the renewal terms it contractually agreed to, you may switch — with 15 days' written notice (Schedule, Exemption 2). Many Chicago-suburb households are in municipal aggregation today; joining Base means leaving and staying out.
• Base may switch your ComEd delivery rate plan on your behalf. Members grant Base authority to move them to ComEd's Distribution Time of Use delivery pricing — Base says this can save money, and does not guarantee it will (§A.8).
• The battery is exclusively Base's to run. Members agree "not to operate the Battery System or direct the Energy stored in it in any way," and grant Base the right to enroll it in any program or market (§C.1).
• Disputes go to binding individual arbitration in Austin, Texas, under Texas law, with a class-action waiver (§J), and claims must be brought within two years.
• Base can change the agreement. Non-material changes and changes that benefit you need no notice; a material change requires 30 days' notice — and gives you a penalty-free exit window if you object in writing (§K). That exit right is worth diarizing.
• Genuinely customer-favorable terms, stated as plainly: a 3-business-day rescission window after signing; a full deposit refund if you cancel within 48 hours of property-photo approval; the year-12 renewal is opt-in, not automatic — do nothing and the agreement ends; and Base commits to written responses to complaints, with escalation to the ICC (1-800-524-0795) and the Illinois Attorney General available.

Energywell's agreement got the same treatment when we published in August — its Section 9 solar exclusion, fee schedule and credit formula are quoted below and linked in Sources. We have not seen a comparably complete public document set from Energywell; its published agreement remains the controlling text we can point to.

Will the battery change the rest of my bill?

Yes, and both companies have a mechanism to offset it. A battery that charges from the grid pulls kilowatt-hours through your meter, and ComEd bills delivery on every kilowatt-hour you draw — that's lane 3 in the charging rules, the lane a rebated solar battery can't use. Left alone, that would raise your delivery charges simply because the company is charging its own battery at your house. Both companies credit the supply side of your bill to compensate.

Read side by side, both companies do the same thing: they tie the offset to ComEd's own delivery rate rather than to a fixed number of cents. Base Power's Net Metering Addendum credits you at ComEd's delivery rate for every kilowatt-hour the battery draws from the grid — and charges you that same rate for every kilowatt-hour your house then takes back out of the battery. Energywell's Battery Participation Credit Addendum multiplies ComEd's published per-kilowatt-hour delivery charge for your rate class by the battery's grid consumption for the billing period. Energywell's credit is capped at what you owe that month and does not carry forward; both companies reserve the right to change these terms with notice.

Correction, September 15, 2026. Earlier versions of this page described Base's offset as a stated 3.48 cents per kWh, following the figure the Citizens Utility Board published in July. On re-reading Base's addendum in full, 3.48 cents is Base's solar export credit — what it pays for a kilowatt-hour your solar sends out that your home doesn't use — not the delivery-charge offset, which is pegged to ComEd's rate. We have corrected it here.

One line in Base's addendum is worth reading twice, because it is the clearest statement anywhere of who earns what: for the avoidance of doubt, you receive no credits from Base when the battery discharges to the grid. Energywell's agreement says the same in its own words — you are not compensated for energy stored in but not dispatched from the battery, and the battery drawing from the grid may make your metered consumption higher than it would otherwise have been. That is the bargain in both offers: the discount is on your supply rate, not a payment for what the battery does.

One mechanic Base has since documented on its own Illinois page: dispatch credits can exceed your supply charges in a heavy-dispatch month, showing a negative supply balance. Those credits roll forward on your ComEd account to offset future bills — Base states it cannot issue refund checks for them.

Can you have one of these offers and rooftop solar?

No, and this is the term most likely to matter later. Energywell's agreement excludes solar outright for the full fifteen years. Base does not prohibit it but warns in its own help center that its offer may cost solar customers more than staying with ComEd. Either way, signing one of these agreements takes rooftop solar off the table for more than a decade.

Energywell's Battery Service Agreement states it directly:

"Customers with solar panels or any distributed generation installed at their service address at any time during the 15-year term of this Agreement are not eligible for this product (or will become disqualified from this product), absent written agreement from the Company."

Energywell Battery Service Agreement, Section 9 — re-verified September 15, 2026 (version 20260624)

Installing solar anyway is treated as a breach, carrying liquidated damages of $50 for each month remaining in the term, capped at $3,000, on top of anything else owed.

Base's position is commercial rather than contractual. Its help center tells prospective customers:

"If you have — or plan to add — solar panels, switching to Base may cost you more than using ComEd as your supplier. ComEd offers hourly pricing and net metering, which credits solar members at better rates than Base's flat solar buyback rate."

Base Power help center, last edited August 20, 2026 — re-read September 15, 2026

The hourly-pricing rate Base points to there is ComEd's own, and it is the rate that makes a $0 supply bill arithmetically possible for a solar home — that is covered on ComEd hourly pricing with solar.

The Citizens Utility Board reaches the same conclusion from the outside, listing "you have rooftop solar or are interested in getting it" among the situations where these offers are not the right fit.

None of that makes either offer a bad deal. It makes it a fork in the road. A battery bundle and a solar system are two different answers to the same complaint about your bill — one lowers the price of the power you buy, the other reduces how much you buy — and in Illinois you cannot practically do both. The order matters: it is far easier to check whether solar works on your roof before signing a twelve or fifteen year agreement than to unwind one afterward.

Why can their battery charge from the grid when yours can't?

If two salespeople told you opposite things about whether a home battery can charge from the grid, they may both have been quoting something real. ComEd's rules aren't one rule — they're three lanes, and which lane a battery sits in decides everything: where it may charge from, who collects the rebate, and who gets paid.

Swipe the table sideways to see all three lanes →

Under ComEd's net metering tariff, a battery on a rebated, net-metered solar system is charged by the solar system — the customer attests to it. The same tariff makes a renewable generator a prerequisite for net metering at all, which is why a battery standing on its own cannot net-meter. There is one narrow exception, for storage that actively participates in PJM's frequency-regulation market; in practice that is aggregator territory rather than a rooftop option.

ComEd's coming virtual power plant does not require solar — the tariff qualifies standalone batteries and defines how their injections are measured. Participation runs a five-year term, the season is June 1 through September 30, and the dispatch window is 4:00 to 6:00 p.m. on weekdays, with seasonal payments based on what the battery actually injects. It is mandatory for any battery that took ComEd's storage rebate, and optional for every other battery.

Base's and Energywell's batteries sit outside both programs, which is exactly why they may charge from the grid: to ComEd, that charging is ordinary household load. Base's chief executive has described the mechanic in plain terms:

"We're basically making your home run on 4 a.m. power versus 6 p.m. power"

Zach Dell, chief executive of Base Power, in Chicago Tribune coverage of the company's Illinois launch, July 2026

The margin behind the discounted supply is a supplier-side mechanism rather than a battery payment. Vote Solar's Will Kenworthy explained to Utility Dive in August 2026 that a 2022 change to Illinois tariffs lets load-serving entities aggregate their customers' capacity obligations — battery customers included — which is how a discount of this size is funded today. Base's chief operating officer, Justin Lopas, told the same publication that market dynamics drove the Illinois launch, with ComEd supply rates up roughly 50% in 18 months on a PJM capacity shortage.

What the tariff actually says ComEd's filed language, quoted exactlyTap to collapseTap to expand

These are ComEd's filed tariff sheets, quoted exactly. Sheet numbers and effective dates are included so you can verify them.

Lane 1 — net metering requires a generator.

"For a retail customer to be considered for service hereunder, the retail customer must own, host or operate, including any third-party owned systems, a Distributed Electric Renewable Generating Facility, which may include a co-located Energy Storage System that is installed on the same premises."

Rider POGNM, Prerequisites of Service — Ill. C.C. No. 10, 1st Revised Sheet No. 294.1, effective July 13, 2025

Lane 1 — and the battery on it is solar-charged, by attestation.

"A retail customer taking service under the terms of this tariff whose Distributed Electric Generating Facility includes a co-located Energy Storage System that is alternating current (“AC”) coupled with the Distributed Electric Generating Facility must attest that such Energy Storage System is solely powered by such Distributed Electric Renewable Generating Facility."

Rider POGNM, Prerequisites of Service — Ill. C.C. No. 10, 1st Revised Sheet No. 294.1, effective July 13, 2025

The exception, and why it isn't a homeowner path. The same paragraph allows a customer outside the NM1–NM4 classifications to charge storage from the distribution system, but only while that storage is active in PJM's frequency-regulation market — and ComEd may ask for proof:

"...may utilize the electric distribution system to power the Energy Storage System so long as the Energy Storage System maintains active participation in the PJM frequency regulation market."

Rider POGNM, Prerequisites of Service — Ill. C.C. No. 10, 1st Revised Sheet No. 294.1, effective July 13, 2025

Lane 2 — when ComEd's virtual power plant can start.

"Retail customers may begin taking service under this rider beginning no later than March 1, 2027."

Rider SDVPP, Applicability — Ill. C.C. No. 10, 2nd Revised Sheet No. 471, effective July 16, 2026

Lane 2 — and what qualifies for it.

"SDVPP qualifying devices include an Energy Storage Facility which is fixed in place, for a period of time not less than the SDVPP Program Term, and may be associated with a Distributed Electric Renewable Generating Device. System Injections associated with an Energy Storage Facility which is standalone or is AC coupled with a Distributed Renewable Energy Generation Device shall be measured at the Smart Inverter(s) connected to the Energy Storage Facility. System Injections associated with an Energy Storage Facility which is DC coupled with a Distributed electric Renewable Generating Device shall be measured based upon combined export of the paired resources."

Rider SDVPP, SDVPP Qualifying Devices — Ill. C.C. No. 10, 2nd Revised Sheet No. 475, effective July 16, 2026

Two scope notes, so the quotes aren't read for more than they say. The attestation sentence is written for AC-coupled storage; a DC-coupled battery charges through the solar inverter by design, and the tariff addresses DC-coupled systems separately, in how their injections are measured. And the PJM carve-out is written for customers outside NM1–NM4 — the net-metering classifications closed to anyone starting service on or after January 1, 2025, and kept only by customers already grandfathered into them.

Here is the part nobody selling anything has a reason to volunteer: a battery with no solar at all can join ComEd's virtual power plant when it opens. It will not receive the $300-per-kWh storage rebate, because the rebate's terms require the battery to be charged by an on-site renewable generator, and it cannot net-meter, because net metering requires a generator. Three doors, all genuinely open, and each one closes something the others leave open. The rebate side is laid out on Illinois battery incentives; the export-credit side is on ComEd net metering.

One change is coming that could move these lines, and it is worth knowing before you sign anything. Illinois' 2026 grid law directs a $300-per-kWh rebate for standalone storage and requires utilities to allow net metering for behind-the-meter storage. The Citizens Utility Board reported on September 14, 2026 that a standalone device generally isn't eligible for either until the utility files updated tariffs and the Illinois Commerce Commission approves them — and that ComEd has said it expects both to apply to standalone storage interconnected on or after June 1, 2026. Until those tariffs are approved, the rules quoted above are the rules in force.

None of these lanes is the wrong one. What matters is the order they get chosen in: two of the three still leave solar on the table, and the third takes it off for twelve to fifteen years. That is the one question worth settling before you sign — and it is free to answer.

Are you even eligible for these offers?

Both offers have hard gates that rule out a large share of Illinois households before price ever enters the conversation. Five questions settle it. Nothing you select is sent anywhere — this runs entirely in your browser.

Is this the same as ComEd's virtual power plant?

No. Three different things are using the same language right now, and conflating them is easy. Energywell calls its network a "Connected Energy Community," which the Citizens Utility Board describes as a virtual power plant. Base operates its batteries as a dispatchable fleet. ComEd has its own, separate, utility-run program called the Scheduled Dispatch Virtual Power Plant — its tariff took effect July 16, 2026, the tariff requires service to begin no later than March 1, 2027, and as of September 15, 2026 enrollment is not open. The Citizens Utility Board reported on September 14, 2026 that ComEd is working toward a spring 2027 launch.

Two facts from the tariff most coverage misses: solar is not required — standalone batteries qualify — and any battery that takes ComEd's storage rebate must participate once the program starts.

The practical difference is who owns the battery. Under ComEd's program, you own a battery and ComEd pays you to let it dispatch during defined windows. Under Base and Energywell, the company owns the battery and you get discounted supply instead of a payment — and the company, as owner, also collects the utility rebate on the hardware. All three trace back to the same Illinois law, which is why the vocabulary overlaps.

If it is ComEd's own program you are trying to understand — the rate, the enrollment timing, and the commitment that comes with taking ComEd's battery rebate — that is covered in full on ComEd's virtual power plant explained.

Not sure which direction actually fits your house?

The eligibility check is free, takes about a minute, and if rooftop solar isn't right for your roof or your usage, it tells you that instead of booking you a sales call.

Who are these offers actually good for?

There is a real customer here, and it is worth describing honestly. If you own a single-family home in ComEd territory, you have no interest in solar now or later, you expect to stay put for well over a decade, and you want backup power without spending five figures on a battery, these offers are a reasonable fit — and the guaranteed discount against ComEd's price is genuinely unusual for an Illinois alternative supplier.

The Citizens Utility Board's own list of situations where these offers do not fit is short and clear: you are an Ameren or MidAmerican customer; you rent, or live in an apartment or condo; you plan to move soon; you have rooftop solar or are interested in getting it; you want the flexibility to switch plans as new options appear; or you need dependable backup power, since neither company guarantees the battery will be charged when an outage starts.

The Citizens Utility Board also noted, when it published in July 2026, that it had not yet heard from Illinois consumers who completed the process and could not evaluate how the plans perform in practice. As of September 15, 2026, CUB has published no follow-up — so there is still no independent Illinois track record for either offer, and the customer reviews both companies publish are overwhelmingly from Texas, where the offers are older.

Battery and supply bundle FAQ

Related answers

Sources

• Citizens Utility Board — CUB Q&A: Battery + electricity supply offers in Illinois (July 22, 2026) — the primary independent consumer source for both offers; no follow-up published as of September 15, 2026
• ComEd Schedule of Rates, Ill. C.C. No. 10 — Rider POGNM, Prerequisites of Service (1st Revised Sheet No. 294.1, effective July 13, 2025) and Energy Storage System definition (8th Revised Sheet No. 294, effective August 29, 2025), read September 15, 2026
• ComEd Schedule of Rates, Ill. C.C. No. 10 — Rider SDVPP, Scheduled Dispatch Virtual Power Plant Program (Sheets 471–476, effective July 16, 2026), read September 15, 2026
• Citizens Utility Board — Upcoming CRGA Programs (September 14, 2026) — the standalone-storage rebate and storage net-metering timeline, ComEd's expected June 1, 2026 interconnection cutoff, and ComEd's spring 2027 VPP launch target
• pv magazine USA — Solrite brings its $0-down solar and storage offering to Illinois (August 21, 2026) — the third Illinois entrant's structure and terms
• Plug In Illinois — ComEd Price to Compare (Illinois Commerce Commission) — the 10.399¢/kWh benchmark both offers are priced against, effective through September 30, 2026
• Base Power — Illinois Battery Services Agreement (PDF) (dated May 4, 2026; read in full September 15, 2026) — term, cancellation charges, incentive ownership, supply-enrollment condition, arbitration, exemptions
• Base Power — Illinois Net Metering Addendum (PDF) (dated April 24, 2026; read in full September 15, 2026) — the delivery-rate offset, the 3.48¢/kWh solar export credit, and the no-credit-on-grid-discharge term
• Base Power — help center: joining Base with solar (last edited August 20, 2026; re-read September 15, 2026) — the company's own caution to solar customers
• Base Power — Illinois Price History for the Life of Product — the published rate-history record behind the table above
• Energywell — Illinois Battery Service Agreement (PDF) (version 20260624; read in full September 15, 2026) — Section 9 solar exclusion, the Section 12 incentive-ownership clause, fee schedule and cancellation terms
• Energywell — Illinois Battery Participation Credit Addendum (PDF) (dated June 24, 2026; read in full September 15, 2026) — how the delivery-charge offset is calculated
• Base Power — Illinois page, published rates, plan overview and launch announcement, accessed September 15, 2026. Cited by name; we do not link the companies' sales pages.
• Energywell — Illinois rates and battery product pages, accessed September 15, 2026. Cited by name; we do not link the companies' sales pages.
• Utility Dive, "Pay-as-you-go batteries" (August 11, 2026) — the capacity-obligation aggregation mechanism behind the supplier discount, and both companies' Illinois market context
• Chicago Tribune coverage of Base Power's Illinois launch (July 2026), via syndication — the company's own description of overnight grid charging
• Illinois Commerce Commission — supplier records for Base Retail, LLC (license 26-0121) and Fanfare Energy, LLC d/b/a Energywell (dockets 26-0011 and 26-0381)
• Public Act 104-0458, the Clean and Reliable Grid Affordability Act — the Illinois law under which both companies are compensated for grid services

Links to Base Power and Energywell documents are provided so you can verify the contract language quoted above, and are marked so they pass no ranking credit. We link the contract documents only, not either company's sales or enrollment pages.

How to cite this page: The Day Company, "What are Base Power and Energywell offering Illinois homeowners?", theday.company/answers/battery-supply-bundle-illinois, last reviewed September 15, 2026.
Changelog: September 15, 2026 — v3: added The Charging Rules — Rider POGNM's solar-only charging attestation and the new Rider SDVPP quoted directly from ComEd's rate book, with sheet numbers; VPP status updated to the tariff's March 1, 2027 outer bound; standalone-battery VPP eligibility documented; rebate-eligibility nuance added; FAQ expanded to 15 and converted to visible format; mobile sticky CTA repaired; every rate and published term re-verified at source the same day, adding CUB's September 14 CRGA update (a standalone-storage rebate and storage net metering are directed by law but await ICC-approved tariffs; ComEd targets a spring 2027 VPP launch) and SOLRITE Energy's August 20 Illinois entry; all five contract documents re-read at source the same day, producing two corrections — Base's 3.48¢/kWh figure is its solar export credit rather than the delivery-charge offset (both companies peg that offset to ComEd's delivery rate), and Base's solar help-center article was last edited August 20, 2026, not May 7 — plus Energywell's Section 12 incentive-ownership clause and its $99 monthly battery service fee. September 3, 2026 — v2, the monthly re-check this page promised: every figure re-verified at source; Base's newly published Illinois Battery Services Agreement read in full and cited directly (deposit-day term start, opt-in year-12 renewal, fair-market-value "upwards of $10,000," 90-day move rule, supply-enrollment condition, no municipal aggregation, arbitration, incentive ownership); rebate-ownership section added; Base rate history, backup durations, PEA note and negative-balance mechanic added; Energywell 2-vs-5-year conflict re-dated; ComEd VPP status updated. August 2026 — v1 published.
Update triggers: this page is revised when either company changes its published rates, fees or terms; when either expands into Ameren or MidAmerican territory or into Chicago proper; when the Citizens Utility Board publishes a follow-up; when the Illinois Commerce Commission issues an order affecting either supplier; or when ComEd opens SDVPP enrollment. Because these offers are new and moving, we re-check every figure here monthly.