Looking for a panel upgrade Hamilton homeowners can trust? If your home still runs on its original electrical panel, there’s a good chance it wasn’t built for how much power a modern household actually uses. Mercanti Electric handles electrical panel upgrades in Hamilton and the surrounding area, upgrading residential panels to 100A, 200A, and 400A service, fully permitted and inspected to Ontario’s electrical code.
A panel upgrade isn’t just about adding capacity, it’s often about safety. Older panels, particularly certain brands common in homes built before 1990, are known to fail in ways that create real fire risk. We’ll walk through what to look for, what a proper upgrade actually involves, and what actually drives the cost, honestly, before you ever have to ask.
If more than one of these sounds familiar, it’s worth having your panel properly assessed rather than guessing. A panel that’s just inconvenient today can turn into a real safety concern tomorrow, especially once new demands like an EV charger, a heat pump, or a home addition get added on top of what it’s already straining to handle.
Most upgrades we do land on 200A, the practical sweet spot for a modern home.
Typical home
Older, smaller homes
Most modern homes
Large homes, heavy use
Supports
Basic appliances, lighting
Central air, EV charger, heat pump, dryer, range together
Multiple large systems at once
Room to grow
Little to none
Good headroom for future additions
Maximum headroom
For most homeowners, 200A is the right call. It comfortably handles central air, a dryer, a range, and an EV charger running together, without leaving you constantly juggling what’s on at once.
100A tends to make sense only when you’re doing a like-for-like replacement of a failing panel with no plans to add major new loads. 400A is really a decision for larger homes or properties running several major systems simultaneously, workshops, in-law suites, or homes planning a significant future addition. If you’re not sure which category your home falls into, that’s exactly what the assessment is for, we won’t guess, and neither should you.
Certain older panel brands installed between the 1950s and 1980s have a well-documented history of breaker failure. Federal Pacific Electric (FPE) “Stab-Lok” panels are the most notorious, independent testing has found failure rates as high as 25 to 60 percent, meaning the breaker simply doesn’t trip when it’s supposed to during an overload. You can often identify one by the “Stab-Lok” label inside the panel cover, or breakers with a thin black face and a red trip indicator.
Zinsco panels (also sold under the names Sylvania, GTE-Sylvania, and Challenger) have a different failure mode, the connection between the breaker and the bus bar can loosen and overheat, sometimes fusing the breaker in place so it can’t trip or even be removed.
Both failure types create the same outcome: a circuit that keeps carrying current when it should have shut off, which is how house fires start. If your panel is original to a home built before 1990, it’s worth having it identified. If it turns out to be one of these older, higher-risk types, replacement isn’t a maybe, it’s the safe move regardless of whether you were already planning to add capacity.
Yes, briefly, and this is worth planning around rather than being surprised by. A panel upgrade requires shutting off your home’s main power while the old panel is disconnected and the new one is installed and connected. For most straightforward residential jobs, that outage window runs two to four hours, not an entire day.
During that window, anything relying on continuous power, a fridge, a freezer, a sump pump, a home security system, will be without electricity. We schedule the work at a time that fits your household, and we’ll walk you through what to expect beforehand so there are no surprises on install day, no half-charged phones, no spoiled groceries, no guessing when the lights come back on. Once the new panel is connected and inspected, power is restored and everything comes back online.
Every panel upgrade is a little different, and the price depends on a handful of real factors, not a flat rate. Here’s what actually moves the number:
We walk through each of these during your assessment and give you a clear, itemized quote before any work starts, no vague estimate, no surprises once the job is underway.
One option worth knowing about: the Canada Greener Homes Loan, an interest-free loan that can sometimes be used toward panel upgrades as part of a broader home energy improvement.
Our panel upgrade process is straightforward, most jobs are completed in a single day.
We inspect your current panel, identify its age, brand, and condition, and calculate your home’s actual load requirements.
You get a clear, itemized price before any work begins, including whether utility coordination is needed.
We handle the application, a panel upgrade legally requires a permit and inspection in Ontario.
We install the new panel during a planned, short power outage, not an unexpected one.
We install the new panel, breakers, and any required wiring updates, all to current code.
We coordinate the inspector visit to confirm the work meets code before we consider the job done.
We show you your new panel, explain what’s changed, and answer any questions before we leave.
Often, yes, in a real and direct way, not just theoretically. Many insurance providers now ask specifically about panel type during underwriting, and some will charge higher premiums, or decline coverage outright, for homes with known-hazardous panels like Federal Pacific Stab-Lok or Zinsco. If you’re renewing a policy or shopping for new coverage, a documented panel upgrade can directly improve your options and your rate.
On the resale side, an outdated or hazardous panel is one of the most common flags in a home inspection, and it’s the kind of issue that can stall a deal or trigger a last-minute negotiation over price. A panel that’s been properly upgraded, permitted, and ESA-inspected comes with paperwork you can hand a buyer, or their inspector, that closes the question instead of raising it. That documentation is worth keeping on file even years after the work is done.
Larger commercial and industrial panel and distribution upgrades are also available throughout the GTA and Southern Ontario.
Reach out today for a straightforward assessment and a clear quote.
It depends on your home’s current and future electrical load, central air, an EV charger, a heat pump, and other major appliances all factor in. We calculate this during a proper assessment rather than guessing.
Most residential panel upgrades are completed in a single day, including the short scheduled power outage during the actual swap.
Yes. Any panel upgrade Hamilton homeowners undertake requires an ESA permit and inspection. We handle the application and coordinate the inspection as part of every job.
Yes, briefly, typically a few hours while the old panel is disconnected and the new one is installed. We schedule this at a time that works for your household.
It depends on the brand and age. Certain older panel types, particularly Federal Pacific Stab-Lok and some Zinsco panels, have documented failure risks and should be replaced regardless of capacity needs. We can identify which situation applies to your home.
In some cases, yes. Insurers sometimes charge more, or decline coverage, for homes with older or known-hazardous panel types. An upgrade can directly improve your insurability.
Yes, if your existing service line can’t support the new panel’s capacity, we coordinate directly with Alectra Utilities, Hamilton’s local electricity provider, as part of the project.
