Community Solar for Cannabis Operators: Does It Pencil Out?

How a subscription actually works

A community solar project is a mid-sized solar array, usually a few megawatts on a field or a warehouse roof, that sells shares of its output to customers of the local utility. Illinois defines it as a project that "allows subscribers to pay for shares or some other 'interest' in the project, receiving bill credits in exchange" [illinois-shines-glossary]. NYSERDA's description is the same: projects "generate renewable energy on behalf of multiple customers, who receive credits on their monthly electric bills for their share of the clean electricity that's produced" [nyserda-community-solar].

The mechanics, in order:

1. You sign a subscription agreement with the project's owner or its subscriber manager for a share of the project, expressed in kW of capacity or as a percentage of output.
2. The project sends its output to the grid. The utility meters it and calculates a credit for your share at a rate set by the state's tariff. D.C.'s terms show the formula plainly: facility output in kWh times your subscription percentage times the credit rate equals your credits [dc-doee-solar-for-all-terms].
3. The credit appears on your utility bill and reduces what you owe.
4. You pay the project owner for the credits, at a discount. If the discount is 10 percent, a 1,000 dollar credit costs you 900 dollars.

Your saving is the discount, not the credit. That is the single most misunderstood point in community solar marketing. A developer that talks about "hundreds of dollars in solar credits" is describing money that passes through you to them. Ask only two questions: what is the discount, and what is the credit rate it applies to.

Nothing is installed at your facility. Your utility, your supplier contract, and your meter stay as they are. That is why community solar is compatible with a competitive supply contract in choice states, though the interaction with capacity charges deserves a look, covered below.

Which of the 17 states have a program worth your time

Community solar exists in most of the deregulated states this site covers, but the rules for a large commercial subscriber differ a lot. Here is what the primary sources say.

Two patterns in that table matter more than any single number. First, the 40 percent cap. Illinois caps any one subscriber at 40 percent of a project's nameplate [illinois-shines-glossary], and New York caps all large demand-metered subscribers combined at 40 percent of output [nyserda-cs-contractors]. Second, the low-income carve-outs. Maryland reserves 40 percent of output [md-psc-community-solar] and New Jersey 51 percent of subscribed capacity [nj-bpu-cs-permanent-2023] for LMI customers. Put those together and a 5 MW project might have 1 to 2 MW available for all commercial anchors combined. Developers like anchors because one contract fills a big block, so a well-run facility has bargaining power for that slice.

The size problem for a grow

Assume a 20,000 square foot indoor facility using 2.4 million kWh a year. That is an input we chose; benchmarks are on the kWh per square foot page.

EIA reports a 24.4 percent average capacity factor for utility-scale solar in 2025 (preliminary), with monthly values from 15.7 percent in January to 31.9 percent in June 2026 [eia-epm-6-07-b]. A 5 MW (AC) project at that national average would produce about 5,000 kW × 8,760 hours × 0.244, or roughly 10.7 million kWh a year; a fixed-tilt array in the Northeast or Midwest will land below that average, so treat 8 to 10 million kWh as a planning range rather than a fact about any specific project. Forty percent of that project's capacity is 2 MW, which produces roughly 3.2 to 4 million kWh. So the largest subscription Illinois would allow on one project is more than this facility's entire annual usage, but only if the developer is willing to give one anchor the whole commercial block and the state's allocation cap allows it.

In New York the 40 percent is shared among every subscriber over 25 kW [nyserda-cs-contractors], so you may be offered 500 kW rather than 2 MW. In New Jersey, with 51 percent of capacity reserved for LMI subscribers [nj-bpu-cs-permanent-2023], the commercial block is smaller still.

The practical result: community solar covers a meaningful slice of a small or mid-sized facility's energy, and a smaller slice of a large one. Multi-site operators sometimes stack subscriptions across several projects in the same territory; Maryland explicitly allows multiple subscriptions up to 200 percent of baseline usage [md-psc-community-solar].

A worked example

Inputs, all assumed: 2.4 million kWh per year; a subscription that covers 1.2 million kWh (50 percent of usage); a credit rate of 9 cents per kWh, which we chose to sit near the supply-plus-transmission portion of a Midwest commercial bill; and a 10 percent discount.

• Annual credits: 1,200,000 kWh × 0.09 = 108,000 dollars
• You pay the developer: 108,000 × 0.90 = 97,200 dollars
• Your saving: 10,800 dollars a year

At a 15 percent discount, the saving is 16,200 dollars. At 5 percent, 5,400 dollars. On a facility whose annual electric bill is in the 350,000 to 400,000 dollar range, that is a 1.5 to 4 percent reduction. Real, but not transformational. The saving is proportional to the credit rate, so a subscription in a high-rate territory like Con Edison's or Eversource's is worth more per kWh than the same subscription in Illinois.

Compare that to the levers on the demand charges page, where a scheduling change on the same facility might be worth 30,000 dollars a year. Community solar is a good second or third move, not a first one.

Contract terms that decide whether it pencils

Community solar agreements run 20 to 25 years on the project side, but your subscription term is negotiable and the fine print is where the discount gets eroded.

Discount type. A fixed percentage discount on credit value is the cleanest structure. A fixed price per kWh can turn into a premium if the credit rate falls, which has happened as states reset value-stack rates. New Jersey's 15 percent floor is applied to the solar-covered portion of the bill [nj-bpu-cs-permanent-2023], which is the right way to think about it.

Credit rate risk. Ask who bears it. Under a percentage discount, both of you do, proportionally. Under a fixed price, you do.

Allocation and true-up. New York requires that no subscriber be allocated more than historic average annual consumption [nyserda-cs-contractors]; Maryland caps total subscriptions at 200 percent of baseline usage [md-psc-community-solar]. Confirm the developer will resize the allocation if you fallow rooms or add a canopy.

Exit terms. Look for the notice period, any early termination fee, and whether you can transfer the subscription to another customer in the same utility territory. D.C.'s Solar for All terms bar transfer [dc-doee-solar-for-all-terms], and many commercial agreements allow it only with the developer's consent. If you are on a five-year lease, a subscription you cannot exit or assign is a liability.

Disclosure form. Illinois routes subscriptions through Approved Vendors who must use program disclosure forms [illinois-shines-glossary], and Maryland requires the disclosure form under COMAR 20.62.05 and bans "unfair, false, misleading or deceptive" marketing [md-psc-community-solar]. Read the disclosure before the contract; it is usually shorter and more honest.

Interaction with capacity. In PJM, ComEd's tariff notes that load attributable to net metering and community supply projects "may reflect both consumption and generation" in a customer's capacity peak load contribution [pjm-oatt-m2-comed]. In plain terms, in some territories your subscription can reduce the PLC that drives your capacity charge, and in others it cannot. Ask your utility how it treats community solar in PLC calculations, because that can be worth as much as the discount.

Checklist before you sign

1. Confirm the project is in your utility's service territory and has an interconnection date, not just an application.
2. Get the credit rate and the tariff that sets it in writing, and size the subscription to 80 to 90 percent of annual kWh within the state's allocation cap.
3. Insist on a percentage discount, a defined term, a notice-based exit, and assignment rights.
4. Ask the utility whether the subscription affects your capacity peak load contribution, then run the arithmetic above with your own numbers.