Connecticut Electric Supplier vs. Delivery Rates Guide: How to Choose & Save Thousands
Connecticut consumers and commercial facilities pay some of the highest electricity costs in the nation. Understanding the difference between Delivery Charges (Eversource / UI) and Supplier Charges (generation) empowers you to shop on the official EnergizeCT board, avoid contract expiration spikes, and take the ultimate step toward energy independence: integrating solar and battery storage at the electrical panel with an Unlimited Master Electrician.
The Two Halves of Your Bill: Delivery vs. Supplier Charges
Every Connecticut electric bill—whether issued by Eversource Energy or The United Illuminating Company (UI)—is legally split into two separate commercial categories under the Connecticut Electric Restructuring Act (Public Act 98-28). Conflating these two halves is why so many property owners overpay by hundreds or thousands of dollars every year.
1. Delivery Services
Non-NegotiableWho gets this money: Your local regulated utility company (Eversource or UI).
2. Supplier Services (Generation)
100% Your ChoiceWho gets this money: The generation facility or licensed third-party competitive electric supplier you select.
Compare Real-Time Electric Supplier Rates
Use the state-regulated, PURA-monitored rate board to compare all licensed third-party electric suppliers serving your municipality. Filter by fixed-rate terms, renewable energy content, and plan durations.
How to Shop Safely: 4 Critical Rules & Traps to Avoid
While choosing a competitive electric supplier on EnergizeCT can save an average Connecticut household $500 to $1,500+ per year (and commercial businesses tens of thousands), consumers must navigate contract details vigilantly to avoid costly surprises.
Watch Your Plan Expiration Date
Competitive rates are typically locked in for 6, 12, or 24 billing cycles. When that fixed-term contract ends, many suppliers will automatically roll your account into a variable month-to-month rate that can skyrocket without warning.
Connecticut Law: $0 Early Termination Fees
Under Connecticut General Statutes § 16-245o(g) and PURA regulations, electric suppliers are strictly prohibited from charging early termination or cancellation fees on residential contracts.
You Still Receive Only One Bill
You will never receive two bills. Eversource or UI continues to issue your monthly statement. Your chosen supplier's rate simply appears as a line item in the "Supplier Services" section, and Eversource remits that portion to them on your behalf.
Avoid Door-to-Door & Phone Solicitors
Beware of high-pressure salespeople knocking on your door or calling claiming they represent "Eversource" or the "state energy office" asking to look at your electric bill to apply a discount. They are private brokers who often lock consumers into high variable contracts.
Why Rate Shopping is Only Step 1: Solar & Battery Integration at the Panel
Shopping for a cheaper electric supplier lowers your cost per kilowatt-hour, but you are still paying for every unit of energy you consume, plus rising Eversource/UI delivery fees. The true path to eliminating high Connecticut electric bills is generating your own power on-site with Rooftop Solar & Battery Storage.
However, thousands of Connecticut solar projects hit a complete roadblock during technical plan review: the home or building's electrical panel is outdated, undersized, or physically incapable of backfeeding solar power under the National Electrical Code.
Overcoming the 120% Busbar Rule with Master-Installed Solar Panels
Explore Charles's complete guide on 225A busbar upgrades, supply-side taps (NEC 705.11), and whole-home battery backup gateways.
Under NEC Article 705.12(B), the total combined current from utility main breakers and solar inverter backfeed breakers feeding a panelboard cannot exceed 120% of the panel's interior copper busbar rating:
In a standard 200-Amp residential panel with a 200-Amp main breaker:
- Max permissible bus amperage: 200A × 1.20 = 240 Amps
- Minus the 200A main service breaker = 40 Amps maximum solar backfeed allowance
- At continuous duty (80%), a 40A breaker restricts maximum solar inverter output to 32 Amps continuous (7.68 kW).
! The Conflict: Modern Connecticut homes with heat pumps, central AC, and electric vehicles require 10 kW to 16 kW+ solar arrays. Trying to connect a 12 kW solar system or a Tesla Powerwall to a standard 200A panel violates the 120% rule, causing electrical inspectors to reject the permit.
How Master Electrician Charles E. Federick Sr. Integrates Solar at the Panel
Solar-Ready 225A Bus Panels
Charles installs upgraded 225A copper busbar panels with a 200A main breaker (Square D QO or Eaton CH).
- 70A Solar Backfeed: (225A × 1.20) - 200A = 70 Amps of solar breaker capacity.
- Supports Large Arrays: Allows up to 13.4 kW of continuous solar inverter output without derating your main breaker.
Supply-Side (Line-Side) Taps
Under NEC Article 705.11, when replacing a panel is structurally difficult, Charles taps the conductors between the meter socket and the main disconnect.
- Bypasses the Interior Busbar: Solar backfeed enters on the utility supply side, completely bypassing the 120% rule restriction.
- Dedicated Fused Disconnect: Includes a heavy-duty NEMA 3R outdoor fusible switch and cold sequence disconnect per Eversource standards.
Battery Gateways & Backup ATS
Solar panels shut down during utility storm blackouts unless paired with battery energy storage and an automatic transfer isolation switch.
- Microgrid Interconnection: Charles integrates Tesla Backup Gateway 2/3, FranklinWH aPower, or Enphase System Controllers.
- Zero-Interruption Islanding: Safely disconnects your home from the Eversource grid in milliseconds during a storm outage, running your house on clean solar power.
Solar Installation Stalled by an Outdated Electrical Panel?
Most solar sales companies do not employ in-house E-1 Unlimited Master Electricians. When they encounter corroded meter pans, obsolete Federal Pacific/Zinsco panels, or overloaded 100A services, projects sit in limbo for months. CF Electrical Service partners with solar installers across Connecticut to perform rapid, code-compliant service upgrades, meter rebuilds, and cut-in inspection sign-offs.
Interactive CT Electric Bill Savings & Solar Reduction Calculator
Calculate your immediate monthly savings by switching electric suppliers, and compare how much additional money a solar-ready electrical panel upgrade eliminates.
Found under "Supplier Services" on your Eversource / UI bill.
Competitive rates on energizect.com typically range from 8.5¢ to 10.9¢.
Standard CT delivery charge (transmission, distribution, public benefits).
Frequently Asked Questions: Supplier Rates & Solar Panels
Direct trade insights certified and field-verified by Unlimited Master Electrician Charles E. Federick Sr. (Lic #191788-E1).
Q What is the difference between Supplier and Delivery charges on my Connecticut electric bill?
Delivery charges pay for the physical poles, wires, substations, and storm restoration owned by Eversource or United Illuminating (UI). Delivery rates are set by PURA and cannot be changed. Supplier charges pay for the actual generation of electricity. Under Connecticut law, you have the right to choose an independent licensed electric supplier to lower your supply rate.
Q Where can I compare official licensed electric suppliers in Connecticut?
The only official, state-regulated rate comparison board is operated by the Connecticut Public Utilities Regulatory Authority (PURA) at energizect.com/rate-board/compare-energy-supplier-rates. Never use third-party broker sites or buy from door-to-door solicitors.
Q Can an electric supplier in Connecticut charge me a cancellation fee if I switch?
No. Under Connecticut General Statutes Section 16-245o and PURA regulations, residential electric suppliers are legally prohibited from charging any early termination fees or cancellation penalties. You can cancel or change your supplier at any time with zero fee.
Q What happens when my third-party supplier contract expires?
When a fixed-rate contract expires, the supplier will notify you by mail 30 to 60 days in advance. If you do not actively choose a new contract or switch suppliers, you may automatically roll over into an expensive variable month-to-month rate or revert to the utility Standard Service default rate. Setting a calendar reminder 30 days prior to contract expiration is essential.
Q Why do I need an electrical panel upgrade before installing solar panels?
Under National Electrical Code (NEC) Section 705.12, the 120% Busbar Rule states that the sum of the main breaker and solar backfeed breaker cannot exceed 120% of the busbar rating. A standard 200A panel with a 200A main breaker only permits 40A of solar backfeed (capping system size at 7.6kW). To install larger 10kW to 15kW+ arrays or battery storage systems like Tesla Powerwall, Master Electrician Charles E. Federick Sr. upgrades panels to solar-ready 225A busbars, installs supply-side taps per NEC 705.11, or provides a 400A split-bus service.
Q Will switching electric suppliers affect my storm power restoration or reliability?
Zero impact. Eversource and UI own and maintain all distribution infrastructure regardless of who generates your power. By Connecticut statute, utilities are legally forbidden from discriminating against customers who choose a third-party supplier during outages or storm repairs.
Schedule a Solar-Ready Panel Upgrade Assessment
Planning solar, battery storage, or heat pump installation in Connecticut? Have your electrical service entrance, meter socket, and busbar capacity evaluated by Unlimited Master Electrician Charles E. Federick Sr. (Lic #191788-E1).