When to Upgrade Your Electrical Panel

Your electrical panel is the heart of your home’s power system. In many Prescott and Yavapai County homes, the original panel was sized for a different era — fewer appliances, no electric vehicles, and lower overall demand. Knowing when an upgrade is needed can improve safety, reliability, and future flexibility.

Signs It May Be Time for a Panel Upgrade

Frequent breaker trips If breakers trip often when multiple appliances run at the same time, the panel may be undersized for today’s loads. Breakers are designed to protect wiring from overheating; repeated trips usually mean the system is being pushed beyond its safe capacity.

Flickering or dimming lights Lights that dim when the air conditioner, microwave, or other large appliances start can indicate the panel is struggling to supply enough power.

No available breaker spaces A full panel leaves no room for new circuits. This becomes a problem when you want to add a workshop, EV charger, or home addition.

Outdated or unsafe panel brands Some older panels, particularly certain Federal Pacific (Stab-Lok) and Zinsco models, have documented safety concerns. Independent testing has shown higher rates of breakers failing to trip during overloads, which can leave circuits unprotected. Many insurance companies now flag these panels.

Adding major new loads Installing an EV charger, heat pump, electric range, hot tub, or large workshop equipment frequently requires more capacity than an older 100-amp panel can safely provide.

Home is older and still on 100-amp (or less) service Many homes built decades ago still operate on 100-amp service. Today, 200-amp service is the common standard for most modern households.

Benefits of Upgrading Your Panel

Greater capacity for today’s appliances and future needs
Improved safety and reliability
Ability to add circuits without workarounds
Better support for EV charging, solar readiness, or major renovations
Peace of mind knowing the system meets current demands

What Size Panel Do Most Homes Need?

For the majority of homes in the Prescott area, a 200-amp panel is the practical modern standard. It handles typical household loads plus room for growth. Larger homes or properties with multiple high-demand systems may need more capacity. A qualified electrician determines the right size through a proper load calculation based on the National Electrical Code (NEC).

Next Steps for Prescott Homeowners

A professional evaluation is the best way to know whether your current panel is adequate. Stephens-Son Electric, a veteran-owned residential electrician serving Prescott, Prescott Valley, and Yavapai County, can inspect your panel, explain your options clearly, and provide straightforward pricing.

Resources

National Fire Protection Association (NFPA) – National Electrical Code (NEC / NFPA 70): The primary standard governing electrical installations in the United States.
U.S. Fire Administration – Information on electrical failures as a leading cause of residential fires.
Consumer Product Safety guidance on older panel brands (Federal Pacific Stab-Lok and Zinsco) with known reliability issues.
Arizona Registrar of Contractors (ROC) – Licensing requirements for electrical contractors performing panel upgrades in Arizona.