Renewable Energy Certificates (RECs) for Cannabis Brands

What a REC actually is

Electricity on the grid has no label. A wind farm and a gas plant push power into the same wires, and your meter records kilowatt-hours with no way to tell which generator they came from. A REC solves that with paperwork. Each certificate is created when one megawatt-hour of renewable electricity is generated and delivered to the grid, and it carries the property rights to the environmental and other non-power attributes of that generation [epa-recs]. The certificate records where the facility is, what fuel it used, the project name, and its emissions rate [epa-recs].

The EPA calls RECs the accepted legal instrument through which renewable energy generation and use claims are substantiated in the U.S. market [epa-recs]. If you own and retire a REC, you can say your facility used that MWh of renewable power. If you do not, you cannot, no matter what the wind farm down the road is doing.

Two other terms matter for a cannabis operator:

• Bundled RECs come with the electricity in the same contract. This is how a competitive supplier's "100 percent renewable" product is usually built.
• Unbundled RECs are bought on their own, separate from your power contract. The EPA lists unbundled RECs alongside utility green pricing, competitive supplier green products, power purchase agreements, and on-site generation as the main ways to buy green power [epa-what-is-green-power].

A REC only works once. The EPA defines double counting as two parties claiming the same environmental benefit from the same generation, and it states that making an environmental claim requires retiring the REC [epa-double-counting]. Retirement means the certificate is marked used in a tracking registry, in your name or your supplier's on your behalf, so no one else can claim it.

Compliance market vs. voluntary market

There are two separate reasons a REC changes hands, and they trade at very different prices.

Compliance. Thirty states plus Washington, D.C. have mandatory renewable or clean energy requirements, and three more states have voluntary goals [ncsl-rps]. Under a renewable portfolio standard (RPS), utilities and competitive suppliers must show that a set percentage of the electricity they sold came from renewables, and they prove it by retiring RECs. Illinois' standard reaches 50 percent by 2040 and 100 percent by 2050; New Jersey's is 50 percent by 2030; Massachusetts' Class I requirement is 35 percent by 2030 and rises one point a year after that [ncsl-rps]. Nevada's schedule runs 34 percent for 2024 through 2026, 42 percent for 2027 through 2029, and 50 percent from 2030 on, with a portfolio energy credit trading program run by the PUCN so providers can buy what they are short [pucn-rps]. When a state's RPS is tight, compliance RECs get expensive: the EPA notes compliance REC prices have reached 60 dollars per MWh in some states, and solar RECs in states with a solar carve-out command more still [epa-green-power-pricing].

Voluntary. Anyone who wants to make a renewable claim beyond what the law requires buys in the voluntary market. Supply there is large and prices reflect it. The EPA's pricing page tracks voluntary REC prices falling from about 1.20 dollars per MWh in 2010 to under 0.35 dollars per MWh in 2016, with some recovery after that [epa-green-power-pricing]. National, regional, and resource-specific RECs all price differently, but the order of magnitude is the point: a voluntary national REC has recently cost less than a cup of coffee per MWh, while a compliance solar REC in a carve-out state can cost more than the electricity itself.

The two markets are connected by a rule the EPA calls regulatory surplus. Voluntary green power has to go beyond what the standard grid mix or the law already delivers; when a voluntary buyer owns a REC, they deny its use to a regulated entity for compliance [epa-regulatory-surplus]. In plain terms: a supplier cannot retire a REC for its Illinois RPS obligation and also sell it to you as the green part of your contract. Ask.

What Green-e certifies, and what it does not

Green-e Energy is a voluntary certification run by the Center for Resource Solutions. A Green-e certified product can only include renewable electricity from certain wind, solar, geothermal, biomass, and low-impact hydro resources; only facilities built in the last 15 years qualify; and certified RECs cannot be double counted toward a state renewable goal [green-e-energy]. Certification covers a range of transaction types, including brokers, community solar, direct procurement, green tariffs, standalone RECs, and utility green pricing [green-e-energy].

That is an independent check on the three questions that matter: is the resource one most people accept as renewable, is it new enough to have been built because of voluntary demand, and has the REC been retired once and only once. It does not make the REC local, match it to your hourly load, or lower its price. For a brand, the practical value is that "Green-e certified" is a phrase your marketing team can use without inventing its own verification story.

How suppliers price "100 percent renewable" products

In deregulated states, most competitive suppliers offer the same fixed-price contract two ways: standard, and with RECs matched to your usage. See what energy deregulation is if your state is new to you. The renewable version is priced as a per-kWh adder on top of the brown price, and the adder is built from four pieces:

1. The wholesale REC price the supplier pays, in dollars per MWh.
2. The type of REC. National any-resource RECs are cheapest; regional RECs, wind-only or solar-only RECs, and Green-e certified RECs cost more, in roughly that order.
3. The supplier's margin on the REC piece.
4. Rounding. A supplier that buys RECs at 0.80 dollars per MWh and marks them up to 1.50 is still quoting an adder of 0.15 cents per kWh, which looks like a rounding error next to a 7-cent energy price.

Every number below is an input we chose.

Item	Value	Basis
Annual usage	2,400,000 kWh (2,400 MWh)	Assume a 10,000 sq ft flowering canopy running about 200 MWh a month
Brown supply price	7.0 cents per kWh	Assumed fixed contract
Voluntary national REC, delivered	1.00 dollar per MWh	Assumed; EPA tracked voluntary prices under 0.35 dollars per MWh in 2016 with increases since [epa-green-power-pricing]
Green-e certified regional wind REC	5.00 dollars per MWh	Assumed for illustration
Compliance-grade in-state solar REC	60.00 dollars per MWh	Upper end the EPA cites for compliance RECs in some states [epa-green-power-pricing]

• Brown supply cost: 2,400,000 × 0.07 = 168,000 dollars per year.
• Add national RECs: 2,400 MWh × 1.00 = 2,400 dollars, or 0.1 cents per kWh. The renewable product costs 1.4 percent more.
• Add Green-e regional wind: 2,400 × 5.00 = 12,000 dollars, or 0.5 cents per kWh, about 7 percent more.
• Add in-state solar RECs at compliance prices: 2,400 × 60 = 144,000 dollars. That nearly doubles the supply bill, which is why almost nobody does it voluntarily.

When a supplier quotes a renewable adder of a cent or more per kWh for national RECs, the margin is in the adder. Ask for the brown price and the REC price separately, what kind of REC it is, and whether it is Green-e certified. Our page on fixed, index, and block-and-index contracts covers the base contract the adder sits on.

Where the greenwashing risk is

RECs are legitimate. The risk is in the sentence you put on the package. The FTC's Green Guides set the rules for environmental marketing claims, and three of them bite here.

You cannot claim renewable use on power you did not match with RECs. A marketer may not make an unqualified "made with renewable energy" claim on electricity from fossil sources unless it buys RECs matching that consumption [ftc-green-guides-summary]. The bar for the unqualified claim is that all, or virtually all, of the significant manufacturing processes run on renewable energy or on power offset by RECs [ftc-green-guides-summary]. For a grow, that means matching the whole facility's usage, not the office lights.

If you sell your RECs, you lose the claim. A company that generates solar power on its roof but sells the RECs cannot say it uses renewable energy, and the FTC says calling the arrangement "hosting" would be deceptive [ftc-green-guides-summary]. This one catches operators who install solar under a financing deal where the developer keeps the SRECs. Read the contract. If the SRECs go to the developer, the roof is a cost reducer, not a marketing claim. Our page on on-site solar and battery storage walks through those contract structures.

Say what kind. The FTC advises specifying the source clearly, such as "wind" or "solar," to reduce consumer confusion [ftc-green-guides-summary]. "Powered by wind" backed by wind RECs is a cleaner claim than "green" backed by an unspecified mix.

Then there is double counting from the other side. If your supplier's RECs are also retired for RPS compliance, or never retired at all, your claim has no substantiation. The EPA's guidance is that contracts should specify REC ownership and buyers should confirm retirement in their name or through their supplier [epa-double-counting]. State cannabis regulators generally do not police energy claims on packaging, but state attorneys general and the FTC police deceptive advertising in every industry. Confirm your labeling with counsel.

When it is worth doing

The honest framing: RECs do not save money. They cost a small amount and buy a substantiated claim. Whether that is worth it depends on who you sell to.

Usually worth it:

• A consumer-facing brand that already markets on sustainability, where a national REC product adds a fraction of a cent per kWh and lets the claim survive scrutiny.
• A multi-state operator answering investor or lender ESG questionnaires, where "X percent of facility electricity matched with Green-e certified RECs" is a line you can document. See multi-state operator procurement strategy for how to standardize it across utilities.
• A facility in a state with a cannabis energy or sustainability reporting rule, where the REC purchase supports the report (check your regulator; requirements vary and some count RECs differently from on-site generation).

Usually not worth it:

• A wholesale cultivator with no brand exposure and thin margins. Spend the money on efficiency first.
• A facility whose supplier will only quote the renewable product at a large adder. Buy the brown contract and add unbundled RECs separately if the claim matters.
• Compliance-grade or in-state solar RECs purely for marketing. At compliance prices the cost is real money, and a national REC supports the same FTC-compliant sentence.

A better first step for many operators is community solar, which lowers the bill through credits. In most programs the RECs go to the utility or the RPS, so a subscription reduces cost but does not by itself support a renewable-use claim. The two tools do different jobs, and it is common to use both. The solar and renewables FAQ covers the shorter questions that come up along the way.