Connecticut Light & Power (Eversource CT) Rate Selection Guide
The Connecticut Light and Power Company, doing business as Eversource Energy, delivers electricity to roughly 1.29 million customers across Connecticut. CT is a deregulated electric market: Eversource owns the wires and bills delivery, while customers can buy generation from competitive suppliers or take Standard Service at a regulated Rate to Compare.
Connecticut Light & Power (Eversource CT) Rate Schedule Comparison
| Schedule | Type | Rate | Best For |
|---|---|---|---|
| Rate 30/35 (Small C&I) | commercial | Standard Service supply 10.710 cents/kWh (eff. Jan 1, 2026) + delivery | Small businesses and light commercial loads |
| Rate 55/56 (Medium) | industrial | Demand ($/kW) + energy (cents/kWh) per CT tariff | Medium manufacturing and non-manufacturing facilities |
| Rate 57/58 (Large) | industrial | Demand ($/kW) + energy (cents/kWh) per CT tariff | Large industrial and high-demand facilities |
| Competitive supply (Rate to Compare) | commercial | Supplier-priced; benchmark 10.710 cents/kWh | Customers shopping generation to beat Standard Service |
Market Overview
Connecticut operates a restructured retail electricity market. Eversource (CL&P) provides regulated delivery service; generation supply is competitive. C&I customers can choose a licensed retail electric supplier or take Eversource Standard Service (the Rate to Compare), which is procured by the utility and reset January 1 and July 1 each year. PURA oversees delivery rates and supplier licensing.
Need to pull your actual usage data to compare rates? See the Connecticut Light & Power (Eversource CT) Data Access Guide →
Current Rate Schedules
Connecticut C&I bills combine PURA-regulated delivery charges with a generation supply charge that is either competitive-supplier priced or Eversource Standard Service (the Rate to Compare). Standard Service resets every January 1 and July 1. Effective January 1, 2026, small C&I (Rate 30 & 35) Standard Service is 10.710 cents/kWh, a roughly 23% increase from the prior 8.726 cents/kWh. Delivery rates are set separately by PURA and reviewed semi-annually. Larger rate classes (55-58) are demand-metered with delivery charges plus per-kW demand charges and per-kWh energy charges; exact figures are published in the Eversource Connecticut electric tariff and the periodic CT Electric Rates summary.
Effective: January 1, 2026 · Full Tariff Book →
| Schedule | Type | Applicability | Structure | Rate |
|---|---|---|---|---|
| Rate 27 - Small Business Time-of-Use | commercial | Small commercial customers electing time-of-use pricing | Time-differentiated energy charges (on-peak weekday noon-8pm vs. off-peak) plus delivery; supply via Standard Service or competitive supplier. | — |
| Rate 30 - Small Commercial & Industrial | commercial | Most small businesses (general service, non-demand or small-demand) | Monthly customer charge plus delivery and per-kWh charges. Standard Service supply (Rate to Compare) is 10.710 cents/kWh effective Jan 1, 2026. | — |
| Rate 35 - Small Commercial & Industrial (demand) | commercial | Small C&I with demand metering | Customer charge, delivery and demand ($/kW) charges, per-kWh charges; Standard Service supply 10.710 cents/kWh effective Jan 1, 2026. | — |
| Rate 55 / 56 - Medium Manufacturing / Non-Manufacturing | industrial | Medium-sized C&I facilities | Demand-metered: monthly customer charge, per-kW demand charges, and per-kWh energy charges (delivery plus supply). See CT electric tariff for current values. | — |
| Rate 57 / 58 - Large Manufacturing / Non-Manufacturing | industrial | Large C&I facilities (high demand) | Demand-metered with the highest demand and energy components; Variable Peak Pricing available at >=500 kW. Figures published in the CT electric tariff. | — |
Rate Recommendations by Use Case
Small business / light commercial
Small Connecticut businesses on Rate 30/35 should pull Green Button data and compare supplier offers against the 10.710 cents/kWh Rate to Compare.
Supply is competitive and the Standard Service rate jumped ~23% in Jan 2026, so shopping can meaningfully cut the generation portion.
- Download 12 months via Green Button
- Compare fixed supplier offers to the Rate to Compare
- Re-check every Standard Service reset (Jan 1 / Jul 1)
Medium manufacturing / non-manufacturing
Medium facilities (Rate 55/56) should focus on demand management alongside supply shopping.
Demand-metered classes pay per-kW charges, so peak shaving compounds savings from competitive supply.
- Use EPO interval data to find peaks
- Stagger large equipment startups
- Evaluate fixed supply contracts
Large industrial / high-demand
Large facilities (Rate 57/58, >=500 kW) should evaluate Variable Peak Pricing and dedicated supply procurement.
At high demand, both demand charges and supply pricing are large; VPP plus a negotiated supply contract can optimize total cost.
- Model VPP against current usage
- Negotiate multi-year fixed supply
- Invest in automated peak control
Multi-site / portfolio owner
Portfolio owners should centralize data via Portfolio Manager and the Energy Reporting & Disclosure Portal, then benchmark and shop supply across sites.
Aggregated benchmarking surfaces the worst-performing sites and supports portfolio-wide supply contracts.
- Automate data via Portfolio Manager
- Use the disclosure portal for whole-building data
- Standardize a supplier RFP across sites
Historical Rate Trends
Connecticut Standard Service supply prices have risen sharply in recent procurement cycles. Eversource resets Standard Service every January 1 and July 1; PURA also approved interim relief lowering some rates in 2026.
January 1, 2026
Small C&I (Rate 30 & 35) Standard Service supply rate increased from 8.726 cents/kWh to 10.710 cents/kWh.
+23%May 1, 2026
PURA interim decision lowered certain Connecticut electricity rates (benefits-driven adjustment) effective May 1, 2026.
variesOverall trend: Rising over the medium term, with periodic interim reductions
Next expected change: July 1, 2026 (next semi-annual Standard Service reset)
Cost Optimization Strategies
Because supply is competitive and larger classes pay demand charges, Connecticut C&I customers have two main savings levers: shopping the generation supply against the Rate to Compare, and reducing billed demand and peak usage.
Shop competitive supply against the Rate to Compare
For: All C&I rate classes
Use 12 months of interval data to solicit fixed-price supplier offers and switch if they beat Standard Service (10.710 cents/kWh for small C&I as of Jan 2026).
Peak demand management
For: Demand-metered C&I (Rate 35, 55-58)
Shift or curtail load during monthly peaks to lower billed kW on demand-metered classes (35, 55-58).
Variable Peak Pricing participation
For: Accounts >=500 kW
Large accounts (>=500 kW) can elect VPP and shift consumption away from peak windows.
Benchmark and monitor with interval data
For: All C&I
Use EPO/Green Button data in benchmarking tools to find efficiency opportunities and verify savings.
To implement these strategies, you need your 15-minute interval data. Learn how to download Connecticut Light & Power (Eversource CT) interval data →
Deregulated Market Shopping
In Connecticut, C&I customers shop for the generation (supply) portion of their bill while Eversource continues to handle delivery, metering, and billing. The benchmark for any supplier offer is Eversource Standard Service, the Rate to Compare, which for small C&I (Rate 30 & 35) is 10.710 cents/kWh effective January 1, 2026. Larger demand-metered accounts may receive Last Resort Service pricing that varies more frequently.
How to Compare Connecticut Light & Power (Eversource CT) Suppliers
- 01Identify your Eversource rate class and pull 12 months of interval/usage data via EPO or Green Button
- 02Compare supplier all-in $/kWh offers against the current Rate to Compare for your class
- 03Confirm contract term, whether the price is fixed or indexed, and any demand or capacity passthroughs
- 04Sign with a PURA-licensed supplier; Eversource still delivers power and issues the bill
Contract Terms for Connecticut Light & Power (Eversource CT) Supply Agreements
- Fixed-price terms commonly 6-36 months
- Indexed/variable products track wholesale markets and can spike
- Watch for capacity, transmission, and renewable passthrough adders
- Standard Service remains the fallback if you do not choose a supplier
Common Pitfalls When Shopping Connecticut Light & Power (Eversource CT) Rates
- Variable-rate plans can exceed the Rate to Compare after a teaser period
- Early-termination fees on fixed contracts
- Auto-renewal into higher month-to-month pricing
- Compare on a full delivered basis, not just the headline supply rate
Frequently Asked Questions
How does a Connecticut business get interval (15-minute) usage data from Eversource?▾
C&I accounts with interval-recording meters enroll in Energy Profiler Online (EPO) by submitting a signed Service Agreement to EPOAdmin@eversource.com or 866-658-2356. Pricing is $50 for a one-time request, $25/month, or $300/year per account. As AMI smart meters roll out statewide, interval data will increasingly be available through the online portal and Green Button without an EPO subscription.
Can a third-party energy manager pull our data automatically?▾
Yes. The cleanest automated path is Green Button Connect My Data through Eversource's UtilityAPI gateway (usagelink.eversource.com), where you authorize the vendor via an OAuth flow. For benchmarking, you can also grant access through ENERGY STAR Portfolio Manager or the Energy Reporting & Disclosure Portal. EPO also accepts a signed Service Agreement as a Letter of Authorization for brokers and aggregators.
What is the Rate to Compare and why does it matter for our facility?▾
Connecticut is deregulated, so your bill splits into delivery (set by Eversource/PURA) and supply (generation). Standard Service is the default supply price, also called the Rate to Compare. For small C&I (Rate 30 and 35) it reset to 10.710 cents/kWh effective January 1, 2026 and changes again July 1. If a competitive supplier offers a fixed price below the Rate to Compare for your usage profile, switching supply can lower the energy portion of your bill without changing delivery service.
Which Eversource CT rate class applies to our business?▾
Most small businesses are on Rate 30 or Rate 35. Larger facilities fall into Rate 55 (medium manufacturing), Rate 56 (medium non-manufacturing), Rate 57 (large manufacturing), or Rate 58 (large non-manufacturing). Rate 27 is a small-business time-of-use option. Variable Peak Pricing is available for accounts with maximum demand of 500 kW or greater. Exact charges are in the Eversource CT electric tariff.
Does Eversource offer Green Button download in Connecticut?▾
Yes. Any Eversource customer can download up to 13 months of electricity usage in standardized ESPI (NAESB REQ.21) XML from the Green Button section of their online account, suitable for import into energy analysis software.
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