Electrical Panel Upgrade Guide: 100-Amp vs. 200-Amp

Signs your panel may need an upgrade

• Breakers trip frequently, especially when running multiple larger appliances at once.
• You're adding a major new electrical load — an EV charger, a solar system, a hot tub, or a large HVAC upgrade — and your electrician says the current panel doesn't have capacity.
• Your panel is genuinely old (some older panel brands and types, like certain Federal Pacific or Zinsco panels, have known safety concerns beyond just capacity — an electrician can identify these).
• You're using a lot of extension cords or power strips as a workaround for insufficient outlets or circuits, which is itself a fire-risk pattern worth addressing.
• You're doing a major renovation that will add significant new electrical demand (a large kitchen remodel, a home addition).

Why amperage alone doesn't tell the whole story

A 100-amp panel isn't automatically inadequate — a smaller home with gas heat, a gas water heater, and modest appliance load can run comfortably on 100 amps for years. What actually matters is your home's total calculated electrical load versus the panel's capacity, which is something an electrician calculates based on your home's size, appliances, and any planned additions — not something you can accurately judge just from the panel's amperage rating on its own.

Pro tip from our network contractors

If you're planning multiple electrification projects over the next several years — say, an EV charger now and solar later — mention all of them to your electrician when discussing a panel upgrade, even the ones that are still just a possibility. Sizing the panel upgrade for future plans, not just today's immediate need, can avoid paying for a second upgrade later.

What a panel upgrade typically involves

A panel upgrade replaces your home's main electrical panel with a higher-capacity unit, and depending on your situation, may also require upgrading the service line from the utility connection and coordinating a brief power shutoff with your utility company. It's a significant enough project that it typically requires a permit and inspection — never treat it as a casual DIY job. See EV charger installation cost if a panel upgrade is being driven by an EV charging need, and does your roof need replacing before solar if solar is part of your broader electrification plans.