No dedicated large-load rate class yet in Connecticut has not yet produced a state-specific large-load tariff. Connecticut ratepayers are instead exposed to data centre-driven cost pressure indirectly, through the same regional New England Transmission Owners FERC return-on-equity dispute affecting Massachusetts, Rhode Island, Maine and New Hampshire — where a March 2026 FERC order set a lower base ROE and required refunds, while transmission owners have separately proposed an 11.39 percent forward-looking ROE partly justified by data centre-driven grid investment.
Also active in Connecticut: Without a dedicated tariff, a large load locating in Connecticut currently negotiates under standard commercial and industrial rate schedules — worth confirming directly with Eversource or United Illuminating before assuming Virginia- or Ohio-style minimum-take terms apply.
Figures compiled from the Edison Electric Institute's "Large Load Projects and Tariffs" (September 2026) member-company summary and public regulatory filings. Confirm current tariff terms directly with Eversource / United Illuminating and the relevant state public utility commission before relying on any figure for a capital decision.
Weighing Connecticut against another state or a Canadian province with a different rate and interconnection picture entirely? Run both sides of the comparison through our licensed AI data centre cost configurator — it applies each jurisdiction's actual power rate, tax treatment and large-load tariff rules to the same seven build configurations.
Model This State on Your Own Site
Every figure above comes from the same power-cost and tariff dataset behind the SCR AI Build Configurator — a licensed, embeddable widget that models seven data centre build configurations against all nine Canadian provinces and all 50 US states plus DC, returning capital expenditure by line item, energy cost, revenue by commercial structure, EBITDA and payback.
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