Panel Upgrades & Replacement

Panel Upgrades & Replacement in Connecticut

100A to 200A upgrades, breaker panel replacement

Licensed & Insured • CT License ELC.0210985-E

176 Towns Served • Free Estimates • Transparent Pricing

Part of the Ergon Builders Group • 60+ Years Combined Experience

Schedule a Consultation Call Now — (203) 945-7181

Real electricians. Real estimates. No call centers.

If your home still runs on a 100-amp panel, you're likely experiencing the consequences — tripping breakers, dimming lights when appliances kick on, and the inability to add modern amenities like EV chargers or home offices. An electrical panel upgrade from Ergon Electric brings your home's power infrastructure into the 21st century.

Upgrading from 100A to 200A is the most common panel upgrade we perform across Connecticut. This upgrade doubles your home's electrical capacity, eliminates nuisance tripping, and prepares your home for EV charging, high-efficiency HVAC systems, and modern kitchen appliances. We also replace outdated or recalled panels (Federal Pacific, Zinsco, Pushmatic) that pose fire risks.

What's Included

Remove existing electrical panel

Install new 200A main breaker panel

Upgrade service entrance cable

Coordinate with utility company for meter upgrade

Transfer all existing circuits to new panel

Install whole-house surge protection

Label all circuits accurately

Full system testing and load balancing

Municipal permit and inspection coordination

10-year panel warranty

Our Process

📋

Panel Assessment

We evaluate your current panel, service entrance, and electrical load to determine the right upgrade path.

🏢

Utility Coordination

We work with Eversource/UI to schedule the meter disconnect and reconnect — you don't have to call anyone.

🔧

Professional Installation

Our licensed electricians install your new panel, typically completing the work in one day.

✅

Inspection & Activation

We schedule the municipal inspection, get your new panel approved, and ensure everything runs perfectly.

Pricing Options

100A to 200A Upgrade

Standard panel upgrade doubling your home's capacity

$1,800–$3,500

150A to 200A Upgrade

Moderate capacity increase with new panel

$1,500–$2,800

200A to 400A Upgrade

Heavy-duty upgrade for large homes or workshops

$3,500–$6,000

Recalled Panel Replacement

Replace dangerous Federal Pacific, Zinsco, or Pushmatic panels

$2,000–$4,000

Sub-Panel Installation

Add a secondary panel for garage, workshop, or addition

$800–$2,000

View Full Cost Guide

Service Packages

Transparent pricing for every budget. No hidden fees.

Standard Upgrade

$1,800–$2,500

Basic 100A to 200A upgrade

200A main breaker panel
Circuit transfer
Basic labeling
Permit & inspection
1-year warranty

Get This Package

Recommended

Premium Upgrade

$2,500–$3,500

Full upgrade with protection

200A panel with copper bus
Whole-house surge protection
Arc-fault breakers (AFCI)
Complete circuit labeling
Load balancing
Permit & inspection
5-year warranty

Get This Package

Ultimate Protection

$3,500–$5,000

Maximum capacity and safety

400A service or 200A with sub-panel
Whole-house surge + GFCI/AFCI
Smart panel monitoring
Generator transfer switch prep
Future EV circuit roughed in
Permit & inspection
10-year warranty

Get This Package

Factors That Affect Cost

Current panel amperage (100A, 150A, 200A)

Whether service entrance cable needs replacement

Utility company requirements and timeline

Panel brand and quality selected

Number of circuits to transfer

Whether electrical meter needs relocation

Local permit and inspection fees

Adding surge protection or AFCI breakers

What Our Customers Say

Rated 4.9/5 by Connecticut homeowners. Real reviews from real customers.

Ergon Electric upgraded our panel from 100A to 200A and installed an EV charger for our Tesla. Professional, on-time, and the price was exactly what they quoted. Highly recommend.

Michael R.

Greenwich, CT

Panel Upgrade + EV Charger

After getting three quotes for recessed lighting in our kitchen remodel, Ergon was the most thorough and transparent. The work was flawless — 12 recessed lights with dimmers. Kitchen looks amazing.

Sarah K.

Westport, CT

Lighting Installation

Had a Generac 22kW generator installed before winter. From the first assessment to final inspection, Ergon handled everything — permits, gas line, electrical. Generator runs perfectly. Peace of mind.

David L.

Stamford, CT

Generator Installation

Emergency call at 10pm for a sparking outlet. Their electrician was at our door in 35 minutes. Found a loose connection in the junction box, fixed it safely. Can't put a price on that kind of response.

Jennifer T.

Darien, CT

Emergency Service

Complete rewiring of our 1920s colonial. Ergon's team was incredibly careful with our plaster walls and historic trim. New panel, new wiring, new outlets everywhere. Home insurance dropped our rate by 15%.

Robert M.

Fairfield, CT

Whole-Home Rewiring

Installed Lutron Caseta throughout the house — 24 switches and dimmers. Everything works perfectly with our Apple HomeKit setup. The electrician even programmed our favorite lighting scenes. Amazing attention to detail.

Amanda W.

New Canaan, CT

Smart Home Wiring

Areas We Serve

We provide panel upgrades & replacement across 263 Connecticut communities

Fairfield County

Hartford County

Litchfield County

Middlesex County

New Haven County

New London County

Tolland County

Windham County

View All Service Areas

Is This Service Right for You?

Homeowners with 100A or 150A panels needing more capacity

Anyone adding an EV charger, hot tub, or high-power appliance

Homes with Federal Pacific, Zinsco, or Pushmatic panels (recalled/unsafe)

Homeowners planning major renovations or additions

Real estate transactions where panel upgrade is required

Anyone experiencing frequent breaker trips

Related Services

Residential Electrical Service

Full-service residential electrical for CT homes

Learn More

EV Charger Installation

Tesla, Level 2 charger installation for your garage

Learn More

Generator Installation

Whole-home generators by Generac, Kohler, Briggs

Learn More

Whole-Home Rewiring

Knob-and-tube replacement, complete home rewiring

Learn More

Frequently Asked Questions

If your home has a 100A panel, fuses instead of breakers, or you're adding major appliances/EV chargers, it's time. Also upgrade immediately if you have a Federal Pacific, Zinsco, or Pushmatic panel — these are recalled fire hazards.

Most panel upgrades are completed in one day (6–8 hours). Your power will be off for 4–6 hours during the swap. We coordinate with the utility company so there's no disruption beyond the installation day.

Yes, power will be disconnected for 4–6 hours while we swap the panel. We schedule the utility disconnect early in the morning so power is restored by late afternoon.

Yes. All panel upgrades in Connecticut require a building permit and inspection. We handle the entire permitting process for you — it's included in our price.

A typical 100A to 200A panel upgrade in Connecticut costs $1,800–$3,500, depending on your home's specific requirements. We provide free, detailed estimates.

Free Estimates

Need Panel Upgrades & Replacement?

Get a free, no-obligation estimate for your electrical project. Licensed electricians. Transparent pricing. Guaranteed satisfaction.

Schedule a Consultation (203) 945-7181

No obligation • No pressure • Transparent pricing always