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Electrical Nov 25, 2025 6 min read

Do You Need an Electrical Panel Upgrade?

If your home was built before 2000, there's a strong chance your 100A panel can't safely handle modern loads. Here's how to know.

Do You Need an Electrical Panel Upgrade?

Red Flags Your Panel Is Undersized

  • Breakers trip when running microwave + hair dryer + AC
  • You see federal Pacific Stab-Lok or Zinsco brand panel (fire hazard)
  • The panel is warm to the touch or hums
  • You've had a home addition without a subpanel added
  • You want to install a Level 2 EV charger

100A vs 200A vs 400A

100A: fine for a 1,500 sqft home with gas appliances. 200A: today's standard — required for most all-electric homes, EV chargers, and homes over 2,000 sqft. 400A: needed for very large homes, home shops, or dual EV chargers.

Cost & Timeline

Full panel upgrade from 100A to 200A: $2,500–$4,500 including permit and utility coordination. Turnaround: usually 1 day of work but 5–10 business days total once permits and utility scheduling are factored in.

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