Electrical Panel Upgrades in Phoenix, AZ

Adding a pool heater, EV charger, or a new AC unit and your panel can’t keep up? Casther Electric upgrades 100A→200A, 200A→400A, and installs sub-panels across Greater Phoenix. Licensed AZ ROC #311594. Typical range: $2,000–$5,000 plus utility fees.

Signs You Need a Panel Upgrade

• Breakers trip when the AC and pool pump run together
• You’re adding a pool heater, EV charger, or addition
• Your panel is a recalled brand (Federal Pacific, Zinsco)
• Fuses instead of breakers, or a panel older than ~25 years
• A burning smell, warm panel cover, or scorch marks (call now)

What a Panel Upgrade Includes

We size the new service correctly for your actual and future load, coordinate the disconnect and reconnect with SRP or APS, install the new panel and main breaker, re-land and label every circuit, drive new grounding as required, and pull the permit so the work is inspected. A typical residential upgrade is a one-day job with a few hours of planned power-off.

100A, 200A, or 400A?

Most older Phoenix homes were built with a 100A service that’s now maxed out. A 200A upgrade covers the vast majority of homes adding a pool, heater, or EV charger. Larger homes, casitas, or properties adding multiple high-draw loads sometimes need 400A or a sub-panel at the equipment pad. We’ll do the load calculation and tell you straight which one you actually need.

Frequently Asked Questions

How much does a panel upgrade cost in Phoenix?

A residential electrical panel upgrade typically runs $2,000 to $5,000 in the Phoenix area, plus any utility company fees. The price depends on the new amperage (200A vs 400A), the meter and mast condition, and whether grounding needs to be brought up to code.

How long does a panel upgrade take?

Most residential panel upgrades are completed in one day, with a few hours of planned power-off while we swap the panel and coordinate the utility disconnect and reconnect.

Do I need a 200A or 400A panel?

A 200A service covers most Phoenix homes, even with a pool, heater, and one EV charger. 400A is for large homes, casitas, or properties stacking several high-draw loads. We run a load calculation so you don’t over- or under-buy.

Is a permit required for a panel upgrade?

Yes. Panel upgrades require a permit and inspection, and the utility (SRP or APS) must coordinate the disconnect and reconnect. We handle the permit and utility coordination for you.