Ohio Cannabis Cultivation Facility Energy: Lighting, HVAC, and Demand Charges Under Four IOUs
An Ohio indoor grow is a flat lighting block with a year-round humidity problem. Winters are long and lake-effect moisture keeps latent load high near Erie, and every IOU bills the highest 15-minute demand in the month on its general-service schedules. After S.B. 56, cultivator capacity sits in 37 Level I and Level II sites that can expand to 100,000 and 15,000 square feet, which means most serious grows land in demand-metered GS-2 or GS-3 classes where per-kW delivery charges dominate the bill.
Ohio figures last verified 2026-09-11. Full citations in the Sources section.
What an indoor grow looks like to an Ohio IOU
A utility does not see plants. It sees a meter that draws a nearly flat block of power for 12 or 18 hours when lights are on, a smaller block when they are off, and a summer bump when dehumidifiers and chillers work hardest. That shape has two consequences in Ohio. First, the highest 15-minute demand in the billing period sets the per-kW delivery charge on GS-2 and above. Second, the demand level decides the delivery class, and the class decides how riders and SSO benchmarks apply.
After S.B. 56, Ohio holds 37 cultivators: 23 Level I dual-use sites that may expand to 100,000 square feet and 14 Level II dual-use sites up to 15,000 square feet [oh-lsc-sb56-final-analysis] [oh-dcc-cultivators-processors]. Those are not craft-scale accounts. A Level I facility at full expansion is a load that lands in GS-3 or GS-4 at AEP Ohio, GS or GP at FirstEnergy, DS or DP at Duke Energy Ohio, or Primary schedules at AES Ohio [aep-ohio-rates] [fe-toledo-edison-tariff].
Non-residential distribution at AEP Ohio splits into GS-1 (small, non-demand), GS-2 (demand-metered secondary), GS-3 (larger secondary or primary), and GS-4 (transmission-level) [aep-ohio-rates]. FirstEnergy uses Rate GS for general service secondary, GP for primary, GSU for subtransmission, and GT for transmission [fe-toledo-edison-tariff]. Confirm class thresholds and current per-kW figures on the tariff sheet for your operating company before budgeting.
Lighting is the base load, and it sets the class
Assume a Level II cultivator in the Akron area with 10,000 square feet of flowering canopy under 800 W equivalent LED fixtures at 2.8 micromol/J, running an 18/6 photoperiod. Fixture count at roughly 50 watts per square foot is about 500 kW of nameplate lighting load. Not all rooms hit peak at once if you stagger photoperiods, but assume worst case: lights, HVAC, and dehumidification start together and the meter reads 480 kW for one 15-minute interval.
At FirstEnergy's Toledo Edison GS schedule, billing demand is the greatest of the highest 15-minute measured demand, 5 kW, or Contract Demand [fe-toledo-edison-tariff]. For this assumed 480 kW peak, billing demand is 480 kW. The GS distribution charge includes a capacity charge per kW of billing demand (a base-sheet figure of $10.98 for the first 5 kW and $8.039 per kW above 5 kW before riders that update regularly) [fe-toledo-edison-tariff]. That structure alone is thousands of dollars per month on the delivery side before energy, riders, and supply.
Supply is separate. Ohio's June 2026 average commercial rate is 13.77 cents per kWh [eia-epm-5-6-a]. Assume this facility uses 320,000 kWh per month at a 0.75 load factor on the lighting block. Energy at the statewide commercial average is roughly $44,000 per month before demand charges. A competitive CRES contract might beat the SSO Price to Compare, but PJM capacity and NITS pass-throughs were sharply higher in the 2026/27 delivery year [oh-energychoice-glossary], so read pass-through language carefully on any quote.
See demand charges explained and LED vs HPS lighting cost.
HVAC, dehumidification, and the Ohio climate
Ohio averages 5,689 heating degree days and 792 cooling degree days on a 1991-2020 base [noaa-cag-ohio]. Summer dew points regularly reach the mid-60s to low-70s F statewide, and Lake Erie adds humidity in the north [noaa-cag-ohio]. In a sealed flowering room the lights and plants set the latent load, so dehumidification runs even when outdoor air is cold.
The practical effect: winter bills are high on kWh (long heating season, envelope losses) but summer bills are high on kW (dehumidification and sensible cooling stacking on the lighting block). If your facility is in northern Ohio, lake-effect moisture can push latent load above what a dry-climate benchmark would predict. Size HVAC and dehumidification together during buildout, not as separate add-ons after the grow is running.
Demand ratchets and contract demand floors
Ohio IOUs handle minimum demand differently. FirstEnergy sets new customers' Contract Demand at 60 percent of expected maximum demand, which functions as a floor rather than a rolling 12-month ratchet [fe-toledo-edison-tariff]. AEP Ohio GS-2 and above bill distribution per kW of billed demand; pull ratchet language from the current tariff book before assuming a one-month peak disappears next month [aep-ohio-rates].
Staggering room photoperiods, soft-starting HVAC, and pre-cooling before lights-on can shave the 15-minute peak. None of that changes supply choice: a CRES contract replaces the SSO generation line but leaves delivery charges untouched.
Worked example: monthly bill components
Assume the same 480 kW billing demand, 320,000 kWh monthly use, and Ohio's 13.77 cents/kWh commercial average as a rough all-in benchmark [eia-epm-5-6-a]:
| Component | Assumption | Approximate monthly cost |
|---|---|---|
| Energy (all-in average) | 320,000 kWh x $0.1377 | $44,064 |
| Delivery demand (illustrative) | 480 kW x ~$8/kW GS capacity charge | $3,840+ |
| Riders and fixed charges | Varies by IOU and month | $500 to $2,000 |
This is an illustration, not a quote. Per-kW delivery rates change on tariff filings and rider updates. Pull current figures from your IOU tariff before budgeting. The point is that demand lines are material even when supply is competitively priced.
Buildout decisions that lock in the bill
Service size, transformer ownership, metering voltage, and whether you take primary or secondary delivery are decided during design. Moving from secondary to primary service after energizing requires utility coordination and capital spend. If you hold a Level I license and plan expansion toward 100,000 square feet, size the initial service for the expanded load or plan a phased upgrade before canopy fills in.
AEP Ohio's Efficient Products for Business program may offer prescriptive incentives for qualifying lighting and HVAC equipment [aep-ohio-efficient-products]. Ohio ended its statewide efficiency mandate in 2020, so confirm measure lists before purchase.
CO2 enrichment and hidden dehumidification load
Bottled CO2 adds little direct electric load. Burner-based CO2 adds heat and moisture the HVAC must remove, which shows up as kWh on dehumidifiers and can set the summer billing demand peak [noaa-cag-ohio]. In Ohio's humid summers, that indirect load is material. Operators who push CO2 above 1,200 ppm in sealed flower rooms often find July peaks on dehumidification, not lighting. See CO2 supplementation energy cost for the math.
Worked annual cost for the example grow
Continuing the 480 kW billing demand and 320,000 kWh monthly use assumptions above [eia-epm-5-6-a]:
| Load | Assumption | Annual kWh |
|---|---|---|
| Flower lighting | 400 kW, 12 h/day, 365 days | 1,752,000 |
| Veg lighting | 50 kW, 18 h/day, 365 days | 328,500 |
| HVAC and dehumidification | 130 kW average | 1,138,800 |
| Fans, pumps, office | 45 kW continuous | 394,200 |
| Total | 3,613,500 |
At Ohio's 13.77 cents/kWh commercial average, energy alone is about $497,600 per year [eia-epm-5-6-a]. At the 9.89 cents/kWh industrial average the same kWh would be about $357,400 [eia-epm-5-6-a]. The gap shows why delivery class and supply contract structure matter as much as fixture efficiency.
Add delivery demand: assume 480 kW on FirstEnergy GS with a base-sheet capacity charge of $8.039 per kW above 5 kW [fe-toledo-edison-tariff]. Illustrative monthly demand line: (480 - 5) x $8.039 = about $3,819 before riders that also bill per kW [fe-toledo-edison-tariff]. Twelve months at that illustrative rate is roughly $45,800 in distribution demand alone, before energy and SSO or CRES supply. Pull current tariff sheets for your IOU before budgeting.
Default supply if you do nothing
Customers who do not choose a CRES provider stay on the Standard Service Offer from PUCO-supervised auctions, benchmarked as the Price to Compare on Apples to Apples [oh-energychoice-glossary]. Large commercial accounts receive individual quotes rather than posted offers [oh-energychoice-glossary]. A Level I cultivator should solicit CRES bids before energizing so supply can start on the first eligible meter read after witness testing [oh-energychoice-glossary]. Compare fixed vs index vs block-and-index contracts with PJM pass-through language in mind.
Power factor and LED drivers
Poor power factor on LED drivers and VFD compressors can inflate apparent demand on some demand-metered schedules [aep-ohio-rates]. Specify fixtures and HVAC with published power factor or add correction where the tariff bills on kVA [aep-ohio-rates]. See power factor penalties. Interval data from the utility portal helps separate lighting block load from HVAC spikes when negotiating CRES block sizes [oh-energychoice-glossary].
Backup power and standby generators
Indoor cultivation with long flower cycles may need standby generation for critical HVAC and dehumidification circuits during extended outages [aep-ohio-rates]. Ohio IOUs have specific interconnection rules for parallel generation [oh-energychoice-glossary]. See backup generators for cannabis facilities. Generator tests can set unintended demand peaks if timed during lighting hours; schedule tests when rooms are dark [fe-toledo-edison-tariff].
Archive witness test results and rate class assignment in the data room for lender diligence [aep-ohio-rates] [oh-dcc-cultivators-processors].
Related reading
- Ohio hub: regulatory overview and all spoke pages
- Commercial electricity rates: class-by-class benchmarks
- How to switch suppliers: CRES enrollment
- Block-and-index contract case study: how one Ohio cultivator structured supply
Compare with other states
Frequently asked questions
What delivery class does a mid-sized Ohio Level II cultivator usually land in?
It depends on peak demand, not canopy square footage alone. At AEP Ohio, non-residential service splits into GS-1 for small non-demand loads, GS-2 for demand-metered secondary, GS-3 for larger secondary or primary, and GS-4 for transmission-level service. A Level II grow expanded toward 15,000 square feet under LEDs commonly peaks in the low hundreds of kW, which puts it on GS-2 or GS-3 depending on the IOU and whether lights and HVAC start together.
Does an Ohio grow get a fixed default supply price from the utility?
Small commercial accounts have a published Price to Compare on the PUCO Apples to Apples chart, reset every June 1 from SSO auctions. Larger commercial accounts are quoted individually by CRES suppliers rather than posted. Any grow that wants a fixed supply price for a multi-year term signs with a certified CRES provider rather than relying on the SSO benchmark.
How does the Ohio climate change a grow's demand profile?
Ohio averages 5,689 heating degree days and 792 cooling degree days, with summer dew points in the mid-60s to low-70s and lake-effect humidity near Erie. Sensible heating load runs long through winter, but latent load from plants and humid outdoor air keeps dehumidifiers running year-round. The dehumidification plant often sets the summer peak even when lighting schedule is flat.
Are there Ohio rebates for LED grow lights?
AEP Ohio's Efficient Products for Business program lists prescriptive incentives for qualifying equipment, with some lighting shifted to Incentive NOW point-of-sale rebates. Ohio ended its statewide efficiency mandate in 2020, so offerings are narrower than in Michigan or Illinois. Confirm DLC-listed horticultural LED eligibility with the specific utility before purchasing fixtures.
What is FirstEnergy's billing demand rule for a grow in northern Ohio?
Under the Toledo Edison GS schedule, billing demand is the greatest of the highest 15-minute measured demand, 5 kW, or the Contract Demand. New customers' Contract Demand is set at 60 percent of expected maximum demand, which functions as a demand floor. Non-bypassable riders such as NMB are also billed per kW of billing demand.
How does S.B. 56 affect energy planning for cultivators?
S.B. 56 eliminated the Level III tier and capped cultivator capacity in 37 Level I and Level II dual-use sites. Level I may expand to 100,000 square feet and Level II to 15,000 square feet. Facilities planning expansion should size electrical service and rate class placement for the expanded load before energizing, because retrofitting primary voltage or transformer capacity after the fact is expensive.
Related reading
- Ohio Cannabis Energy: Electricity Choice, Rates, and Utilities for Licensed Operators
Ohio cannabis electricity: PUCO choice, four IOU territories, PJM capacity, June 2026 rates vs. the U.S., and cultivator incentives after S.B. 56.
- AEP Ohio for Cannabis Facilities: Delivery Classes, Demand Charges, SSO, and CRES Billing
How AEP Ohio bills a cannabis grow, lab, or dispensary: GS-1 through GS-4, per-kW distribution demand, PJM, Standard Service Offer, and efficiency programs.
- FirstEnergy Ohio for Cannabis Facilities: Three Operating Companies, GS Demand, and SSO Benchmarks
How Ohio Edison, CEI, and Toledo Edison bill cannabis accounts: Rate GS through GT, billing demand rules, Rider GEN SSO, and CRES supply in PJM ATSI.
- Ohio Commercial Electricity Rates for Cannabis Facilities: IOU Classes, SSO Benchmarks, and PJM Context
Ohio commercial power prices vs. the U.S., AEP and FirstEnergy delivery classes, Standard Service Offer Price to Compare, and PJM capacity pass-throughs.
- Pennsylvania Cannabis Cultivation Facility Energy: Lighting, HVAC, and Demand Charges Under PECO and PPL
What a PA grower/processor pays for power: lighting and dehumidification in a 5,701 HDD climate, PECO and PPL demand classes, and a worked example.
- Michigan Cannabis Cultivation Facility Energy: DTE D4 vs D11, Consumers GSD, and Cold-Climate Loads
What a Michigan indoor grow pays for power: 6,745 HDD cold-climate HVAC, DTE and Consumers demand classes, primary voltage savings, and a worked example.
- Demand Charges Explained for Cannabis Cultivators
What a demand charge is, how utilities measure peak kW in 15- or 30-minute windows, why grow rooms get hit hard, how ratchets work, and a worked example.
- Dehumidification Load in Indoor Cannabis Cultivation
How much water a flowering canopy puts into the air, latent vs sensible load, dehumidifier pints-per-kWh ratings, and how it shows up on the electric bill.
- LED vs. HPS Grow Lighting: Energy Cost Comparison
Cited efficacy for double-ended HPS and DLC-listed LEDs, the heat-load difference, a worked cost comparison per 1,000 sq ft, and how rebates change payback.
- Illustrative Case: Ohio Level I Cultivator Structures Block-and-Index Supply on AEP Ohio
Illustrative AEP Ohio Level I cultivator: block-and-index CRES contract, PJM capacity pass-through, and SSO benchmark timing after the June 2026 reset.
Jason Taken founded Jaken Energy, the commercial energy procurement practice behind this site. He works with licensed cannabis operators in deregulated electricity markets to lower supply rates, manage demand charges, and evaluate efficiency upgrades.
Sources
Inline citations in this article, such as [eia-epm-5-6-a], refer to the entries below. Links open the primary source in a new tab.
- [eia-epm-5-6-a]Electric Power Monthly, Table 5.6.A: Average Price of Electricity to Ultimate Customers by End-Use Sector, by State, June 2026 and June 2025 — U.S. Energy Information Administration. Accessed 2026-09-11.
- [oh-lsc-sb56-final-analysis]S.B. 56, 136th General Assembly, Final Analysis (corrected version), April 2, 2026 — Ohio Legislative Service Commission, Office of Research and Drafting. Accessed 2026-09-11.
- [oh-dcc-cultivators-processors]Division of Cannabis Control: Cultivators & Processors — Ohio Department of Commerce. Accessed 2026-09-11.
- [noaa-cag-ohio]Climate at a Glance: Ohio statewide heating and cooling degree days, 1991-2020 base period averages — NOAA National Centers for Environmental Information. Accessed 2026-09-11.
- [aep-ohio-rates]AEP Ohio Electric Rates and Tariffs (Ohio Power Company Tariff Book, September 2026) — AEP Ohio. Accessed 2026-09-11.
- [fe-toledo-edison-tariff]The Toledo Edison Company, P.U.C.O. No. 8, Schedule of Rates for Electric Service (2025 edition) — FirstEnergy. Accessed 2026-09-11.
- [oh-energychoice-glossary]Energy Choice Ohio: Glossary of Terms and Apples to Apples comparison charts — Public Utilities Commission of Ohio. Accessed 2026-09-11.
- [aep-ohio-efficient-products]Efficient Products for Business — AEP Ohio. Accessed 2026-09-11.