Most Centennial homes from the 1975 to 1995 build era came with 100-amp or 150-amp panels. That capacity made sense at the time. Today, with EV chargers, home offices, upgraded HVAC systems, and modern appliances all pulling from the same panel, many of these homes are running out of room. Breakers trip not because something is wrong with the circuit but because the overall demand has outgrown what the panel was designed to handle.

WireNut panel replacements include everything: pulling the permit, coordinating the Xcel Energy disconnect and reconnect, installing the new panel, connecting all circuits, and scheduling the inspection. Our circuit breaker team handles individual breaker issues when a full replacement is not needed. For new circuits that will be added after the upgrade, our electrical wiring team handles the installation. See all Centennial electrical services.

• Panel upgrades from 100 to 200 amps for Centennial homes that have outgrown their original capacity and need more room for modern electrical demand.
• Full panel replacement for panels that are aging, from manufacturers with known reliability issues, or physically failing.
• Subpanel installation for detached garages, workshops, or large additions that need dedicated electrical service.
• Panel evaluation to determine whether an upgrade is needed or whether circuit-level changes can address the capacity issue without replacing the main panel.
• Permit and inspection management, including Xcel Energy coordination, for all panel work in Centennial.

Here are the panel-related projects our Centennial electricians handle most often.

How Do I Know If My Centennial Home Needs a Panel Upgrade?

The clearest signs are breakers that trip regularly without an obvious overload, a panel that runs warm or has a burning smell, breakers that feel loose or do not hold when reset, and a panel with fewer than 20 slots that is already full. If you are planning to add an EV charger, a hot tub, or significant new circuits to your home, checking panel capacity before starting that work is the right first step.

Centennial homes with original 100-amp service and panels from the late 1970s and 1980s are the most common candidates for upgrade. Many of these homes have never had the panel evaluated since original installation, and the combination of age and increased demand makes an assessment worthwhile.

What Panels Should Be Replaced Regardless of Age?

Certain panel brands have documented safety and reliability issues that make replacement advisable even when the panel appears functional. Federal Pacific panels with Stab-Lok breakers and Zinsco panels are the most commonly cited. Both have histories of breakers failing to trip correctly under overload conditions, which defeats the protection the panel is supposed to provide. If your Centennial home has either of these, replacing the panel is the right call regardless of whether you are having active problems.

WireNut can identify the panel brand and model during a service call or inspection and let you know if your panel is one of the types that warrants replacement on those grounds.