When Do I Need an Electrical Panel Upgrade?
Your electrical panel is the heart of your home's electrical system — and an undersized or aging panel is one of the most common causes of electrical problems, insurance headaches, and project roadblocks. Here's how to tell if your panel needs upgrading and what's involved.
Signs You Need a Panel Upgrade
The clearest indicators are: breakers that trip frequently, especially under normal load; flickering or dimming lights when appliances run; a panel with fuses instead of circuit breakers (common in homes built before 1960); a 100-amp or smaller service panel in a home with central HVAC, multiple major appliances, or EV charging; a Federal Pacific or Zinsco/Sylvania panel (these brands have documented safety failures and most electricians recommend proactive replacement); and any panel that physically shows signs of scorching, melting, or rust.
Capacity: 100A, 200A, or 400A?
Most homes built before 1980 have 100-amp service — adequate for basic loads but insufficient for modern energy use. A 200-amp panel is the current standard for single-family homes and handles central HVAC, electric vehicle charging, and typical appliance loads comfortably. 400-amp service (typically delivered as two 200-amp panels) is needed for homes with significant electrical loads: multiple EVs, whole-home battery storage, hot tubs, workshop equipment, and high-end HVAC systems.
When a New Project Triggers a Needed Upgrade
Several common home improvement projects require a panel upgrade before they can proceed: EV charger installation (a 50-amp circuit for Level 2 charging may exceed an older panel's available capacity), whole-home battery storage (Powerwall, Enphase), electric heat pump installation, pool or hot tub addition, and accessory dwelling unit (ADU) construction. Your electrician will assess available panel capacity during the initial site visit.
What a Panel Upgrade Involves
A panel upgrade typically includes: coordinating with your utility company to disconnect service at the meter, removing and replacing the main panel, updating the grounding and bonding to current code, and scheduling a municipal inspection. Depending on your utility's backlog, the utility disconnect/reconnect can be the longest part of the timeline. Plan for 1–3 days of work plus several weeks of scheduling.
How to Find the Right Electrician
Panel upgrades require a licensed electrician — no exceptions. Look for contractors who specifically list panel upgrade or service upgrade as a specialty, as they'll be most familiar with local utility coordination procedures and permit requirements. ElectriScout's Panel Upgrade specialty filters for these contractors by city.
Published · ElectriScout Editorial