Electrical panel upgrades

Panel upgrades from 100A to 200A.

We replace 100A and older split panels with a 200A service. It's for homes adding an EV charger, solar and battery, or a heat pump, and for homes with a Zinsco, Federal Pacific, or fuse-box panel an insurer won't renew. One fixed price covers the load calculation, permits, utility coordination, and the cutover. Most upgrades take a day, with power back on the same evening.

Why homes need the upgrade.

Four reasons homes need one now. If any of these applies to you, get a load calculation before adding another circuit.

Old or unsafe panels

Zinsco and Federal Pacific (Stab-Lok) panels are known to fail to trip under fault. If you have one, replacement is a safety issue.

EV charger loads

A Level 2 charger adds 40–60A of continuous draw. Most 100A panels can't absorb that on top of AC, range, and dryer without an upgrade.

Solar & battery readiness

Most solar + battery interconnections need 200A service and a modern busbar rating. Upgrading now avoids re-permitting and rework later.

Insurance requirements

Insurers increasingly non-renew homes with outdated panels or fuse boxes. A code-compliant 200A service protects your policy and your resale value.

What's included.

One fixed price covers the whole job, from engineering through inspection sign-off. We plan the job up front, so there are no change orders for things we should have seen.

Running a commercial facility? See industrial & commercial service upgrades

What a finished panel looks like.

Two photos from a completed CaliVolt service upgrade, inside the panel and outside at the wall. Dressed conductors and a labeled directory are what the inspector signs off on.

Interior of a completed 200A service panel with breakers installed and branch-circuit conductors dressed into neat runs
Service-panel interior: breakers set, conductors dressed and landed, directory labeled.
Exterior-mounted main electrical service panel installed on the outside wall of a home with conduit runs to the meter
Exterior service panel: meter-side conduit run, weatherproofed and inspection-ready.

Fixed-price, permitted, inspected.

A licensed CaliVolt electrician walks the job, runs the load calculation, and sends a fixed-price quote in writing. The number on the proposal is the number you pay.

We pull a permit for every panel upgrade, and the city inspector signs it off. Unpermitted panel swaps can cost you insurance coverage and resale value. We don't do them.

Ready to upgrade your panel?

Tell us your home's age, current panel size, and what you're adding: EV, solar, heat pump. We quote the upgrade in writing within 24 hours.

Get a quoteCall (559) 919-2288