Panel Upgrades

When to Upgrade Your Electrical Panel: A Complete Guide

Electrical Services for Durham

Region Home

Author: Paul Halvorson

March 20, 2026

Reading Time: 6 minutes

March 20, 2026

Author: Paul Halvorson

Reading Time: 6 minutes

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Last Updated: March 25, 2026

It usually happens at the worst possible time. You're running the AC on a hot July afternoon, you turn on the microwave, and suddenly—darkness. The breaker trips. If this is a regular occurrence in your Durham Region home, your electrical panel might be trying to tell you something.


If your home was built before 1990, your electrical panel may simply not be equipped to handle modern power demands. In this complete guide, we'll walk you through the warning signs, the upgrade process, and exactly what to expect when you upgrade to a 200-amp service.

Think of your electrical panel as the heart of your home's electrical system. It receives power from the utility company and distributes it through various circuits to your outlets, appliances, and lights. When a circuit draws more power than it's designed to handle, the breaker flips to prevent overheating and potential fires.

Common Panel Types in Durham Region

  • Fuse Boxes:  Commonly found in homes built before 1960. They use replaceable fuses instead of switches.
  • 100-Amp Panels: The standard for homes built between 1970 and 1990. Barely sufficient for today's electronics.
  • 200-Amp Panels: The modern standard. Essential if you want to add an EV charger, hot tub, or secondary suite.

Not sure if your panel is due for a replacement? Your home will usually give you a few hints. Here are the most common warning signs we see in Oshawa, Pickering, and Whitby homes:

Sign #1

Tripping

Breakers trip frequently when multiple appliances run.

Sign #2

Flickering

Lights dim or flicker when the AC or fridge kicks on.

Sign #3

Age

Your panel is a Federal Pacific or is over 25 years old.

Upgrading a panel is not a DIY job. It requires coordination with the local utility (like Elexicon Energy), pulling the proper ESA (Electrical Safety Authority) permits, and careful installation by a licensed electrician.

"A panel upgrade is an investment in your home's safety and future capabilities. Doing it right means you won't have to worry about your electrical system for the next 30 years."

— Paul Halvorson, Master Electrician

  • How much does a panel upgrade cost in Durham Region?

    Upgrading from a 100-amp to a 200-amp panel typically ranges from $2,500 to $3,500, depending on the complexity of the job, the location of the panel, and whether the utility line coming to the house needs to be updated.

  • How long will my power be out during the upgrade?

    Most panel upgrades take one full day to complete. Your power will typically be shut off in the morning and restored by late afternoon.

  • Do I need a 200-amp panel for an EV charger?

    In most cases, yes. A Level 2 EV charger draws a significant amount of power. If you have an older 100-amp panel, adding an EV charger will likely overload your system.

  • How much does a panel upgrade cost in Durham Region?

    Upgrading from a 100-amp to a 200-amp panel typically ranges from $2,500 to $3,500, depending on the complexity of the job, the location of the panel, and whether the utility line coming to the house needs to be updated.

  • How long will my power be out during the upgrade?

    Most panel upgrades take one full day to complete. Your power will typically be shut off in the morning and restored by late afternoon.

  • Do I need a 200-amp panel for an EV charger?

    In most cases, yes. A Level 2 EV charger draws a significant amount of power. If you have an older 100-amp panel, adding an EV charger will likely overload your system.

Upgrading your electrical panel brings peace of mind, improves your home's safety, and prepares your property for the future of electrification. If you are experiencing frequent breaker trips or planning a major renovation, it's time to have a professional evaluate your system.

Key Takeaways:

  • Older 100-amp panels struggle with modern electrical demands.
  • Frequent tripping, flickering lights, and reliance on power strips are major red flags.
  • Upgrading to 200-amps is highly recommended before installing an EV charger or hot tub.
  • Always hire a licensed Master Electrician and ensure ESA permits are pulled.

About Paul Halvorson

Paul Halvorson is the owner of PCH Electrical Contractors, serving Durham Region for over 30 years. Paul specializes in panel upgrades, EV charger installation, generators, and smart home integration. When he's not helping homeowners with their electrical needs, you can find him enjoying the outdoors in Port Perry.

Related Reading

EV Charger Installation in Durham Region: Complete Guide

Backup Generator Buying Guide for Ontario Homeowners: Total Peace of Mind

When to Upgrade Your Electrical Panel: A Complete Guide for Durham Region Homeowners

Need Help With a Panel Upgrade?

Call Paul directly for a free quote on your electrical project. Serving all of Durham Region.