Illustrative Case: Eversource Cultivator Compares Standard Service to a Fixed Supplier Rate

The facility and starting situation

Assume a cannabis cultivator in Hartford County on an Eversource account in ISO New England [ct-pura-choose-supplier]. Connecticut licensed 27 cultivators combined across standard, micro, and legacy medical producer categories as of September 2026 [ct-credential-count]. This operator holds a standard cultivator license with 15,000 square feet of minimum canopy and runs 16,000 square feet of flowering space, 4,500 square feet of veg, and post-harvest dry rooms in a former manufacturing warehouse.

Lighting is LED at an assumed 36 watts per square foot in flower. HVAC and dehumidification are sized for Connecticut humidity: the state averages 5,849 heating degree days and 607 cooling degree days, with summer dew points in the upper 60s to low 70s F [noaa-cag-connecticut]. RERACA requires cannabis establishments to file an annual electricity usage report with the state [ct-reraca-chapter-420h].

Summer peak demand reads 185 kW. That keeps the account on Eversource Rate 35 Intermediate General Service, below the 200 kW maximum for that class and well under the 500 kW Last Resort Service threshold [eversource-ct-rates-2026]. At opening the operator took Standard Service generation at the utility-posted rate and never compared it to PURA-licensed supplier offers on the EnergizeCT Rate Board [energizect-rate-board-business].

What the baseline bills showed

The table mixes cited tariff rates with assumed usage. Only the rate class charges and Standard Service price are facts; kWh and dollar totals are inputs.

Line item	Assumption or rate	Monthly (summer)	Monthly (winter)	Notes
Flower lighting	576 kW on 12 h/day	207,360 kWh	207,360 kWh	Assumed load
Veg and dry	55 kW blended	39,600 kWh	39,600 kWh	Assumed load
HVAC and dehumid	120 kW summer / 90 kW winter avg	86,400 kWh	64,800 kWh	Assumed load
Measured peak demand	185 kW	185 kW	165 kW	Rate 35
Distribution demand	$8.69/kW over 2 kW [eversource-ct-rates-2026]	$1,590	$1,416	Rate 35
ESI demand	$2.22/kW [eversource-ct-rates-2026]	$406	$363
Transmission demand	$14.58/kW [eversource-ct-rates-2026]	$2,667	$2,376
Standard Service supply	11.229 cents/kWh Jul-Dec 2026 [energizect-rate-board-business]	~$38,500	~$35,200	Generation only
Approximate total		~$46,000	~$41,000	Excludes FMCC offset

Annualized usage was about 3.9 million kWh. At the EIA June 2026 Connecticut commercial average of 19.62 cents per kWh, that stack would cost roughly $765,000 all-in on paper [eia-epm-5-6-a], above the US commercial average of 14.19 cents [eia-epm-5-6-a].

Delivery demand dominated the bill shape. Rate 35 bills $8.69 per kW distribution, $2.22 per kW electric system improvements, and $14.58 per kW transmission on demand above 2 kW [eversource-ct-rates-2026]. At 185 kW peak, transmission demand alone was about $2,667 a month before a single kWh of supply.

The operator planned a 5,000-square-foot canopy expansion that would push peak demand toward 240 kW. Engineering flagged a harder question: would the expanded facility remain on Rate 35, or cross toward Rate 56 non-manufacturer service at 350 kW with per-kVA billing and higher transmission demand charges [eversource-ct-rates-2026]?

What changed

Three reviews ran before the operator signed a supplier contract.

Rate class confirmation with Eversource. Cannabis cultivation is not automatically classified as manufacturing. Eversource reserves Rates 55 and 57 for manufacturers; Rates 56 and 58 serve non-manufacturers with higher per-kVA transmission demand [eversource-ct-rates-2026]. The operator confirmed in writing that the account would stay on Rate 35 after expansion if peak demand remained under 200 kW, and documented load assumptions before ordering additional HVAC.

Standard Service vs supplier comparison on the Rate Board. For July through December 2026, Eversource Rate 35 Standard Service is 11.229 cents per kWh [energizect-rate-board-business]. PURA-licensed supplier rates for business customers are filed monthly in Docket 06-10-22 and published on the same Rate Board [energizect-rate-board-business]. Connecticut grants full supplier choice to all Eversource customers [ct-pura-choose-supplier].

Fixed supplier contract. The winning bid was 10.4 cents per kWh for generation on a 24-month fixed term with consolidated billing through Eversource. Public Act 25-173 is reworking Standard Service procurement to include at least 25% dynamic market purchases [ecm-ct-pa-25-173], so the operator wanted a fixed line before that blend took full effect.

Staggered photoperiods before expansion. Two of four flower rooms shifted to a two-hour offset, holding summer peak at 178 kW even after partial canopy expansion came online.

The math after

Compare Standard Service to the fixed supplier contract over 3.9 million kWh a year. Delivery is unchanged on either supply path.

Component	Before (annual)	After (annual)	Notes
Eversource delivery demand	~$72,000	~$70,000	Lower peak after stagger
Standard Service generation	~$438,000 at 11.229 cents		Jul-Dec 2026 rate
Fixed supplier generation		~$406,000 at 10.4 cents	24-month term
Modeled supply-side savings			~$32,000/year
Modeled all-in	~$765,000	~$730,000	~−$35,000

The 0.8 cent per kWh spread on 3.9 million kWh is about $31,200 a year in generation savings. Peak reduction from staggering trimmed another $2,000 in delivery demand.

Standard Service will reset January 1 and July 1 [energizect-rate-board-business]. Public Act 25-173 may make future Standard Service prices less predictable [ecm-ct-pa-25-173]. The fixed contract removed that uncertainty for two years.

What did not work

Assuming manufacturer rate class. An equipment vendor told the operator to apply for Rate 55. Eversource confirmed cannabis cultivation does not qualify without a manufacturing process classification. Misclassification would have changed the expansion math.

Waiting until 500 kW for supplier choice. Customers at or above 500 kW monthly demand take Last Resort Service, priced monthly rather than on Standard Service [ct-pura-choose-supplier]. The operator nearly ordered HVAC that would have pushed peak demand past 350 kW into Rate 56 non-manufacturer territory before confirming class placement.

Rooftop solar for peak shaving alone. ISO-NE net metering rules and roof area fit about 120 kW of modules, not enough to cover a 178 kW peak lasting twelve hours. Interconnection costs exceeded the hurdle rate.

Ignoring the RERACA electricity report. The annual usage filing [ct-reraca-chapter-420h] forced the CFO to pull twelve months of data, which surfaced the Standard Service vs supplier gap months earlier than a supply review alone would have.

Connecticut default service volatility

Connecticut Standard Service rates reset on schedules published by the utilities and state rate board. Fixed supplier contracts hedge that reset risk for supply lines only. Delivery demand on Eversource or UI tariffs stays regulated. Compare supplier offers to the published standard service benchmark each renewal season [ct-energizect-faqs].

Ten-day enrollment window before read date

Connecticut supplier switches align to the meter read when enrollment occurs at least ten days before that read [ct-energizect-faqs]. Cultivators comparing Standard Service to fixed supply should sign early enough in the billing cycle to capture the intended start month, especially before winter Standard Service rate changes published by the rate board.

UI versus Eversource default paths

Connecticut has two major IOUs. Standard Service rates and read dates differ between Eversource and United Illuminating. Supplier offers must specify which utility will process enrollment. Cannabis cultivators follow the same commercial rules as other large loads [ct-energizect-faqs].

Winter Standard Service rate publication

Connecticut Standard Service rates for Eversource and UI publish on state rate board schedules. Fixed supplier contracts signed before a winter upward reset hedge supply; delivery still moves with tariff riders [ct-energizect-faqs].

Standard Service rate board publication

Connecticut publishes Standard Service generation rates through the state rate board process. Cultivators on Eversource or UI should compare fixed supplier offers to the published Standard Service price at signing and at each reset before renewal [ct-energizect-faqs].

Winter Standard Service volatility

Connecticut Standard Service rates can move on rate board schedules independent of supplier contracts [ct-energizect-faqs]. Fixed supplier enrollment before winter publication hedges supply; delivery riders still adjust on utility tariffs.

Rate board timing for supplier RFP

Publish Standard Service benchmark from Energize CT the same week you release supplier RFP so bids compare to the same default snapshot [ct-energizect-faqs].

Lessons that transfer to other Connecticut cultivators

Confirm your Eversource rate class before you expand. Non-manufacturer Rates 56 and 58 carry higher per-kVA transmission demand than manufacturer classes [eversource-ct-rates-2026]. Compare supplier offers to the posted Standard Service price on the EnergizeCT Rate Board, not a broker postcard [energizect-rate-board-business]. Stay under 500 kW monthly demand if you want Standard Service rather than Last Resort Service [ct-pura-choose-supplier]. Watch Public Act 25-173 implementation in PURA Docket 12-06-02RE04; default service procurement is changing [ecm-ct-pa-25-173]. File the RERACA electricity usage report on schedule [ct-reraca-chapter-420h]. See utility rate classes explained and the Connecticut switching guide.