Electrical Panel Upgrades · Cupertino, California

Electrical Panel Upgrades in Cupertino, CA

Upgrading an electrical panel — typically 100A to 200A — to add capacity for EV chargers, heat pumps, induction ranges, and modern loads, including Federal Pacific and Zinsco replacements.

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Electrical Panel Upgrades for Cupertino Homes

If there is one electrical job that defines Cupertino, it is the panel upgrade. The city is built out of 1960s and 70s single-family ranch homes, and a huge number of them in Monta Vista, Garden Gate, and Seven Springs are still running the 100-amp service they were poured around fifty-plus years ago. That panel was generous for a 1968 household with a gas range and a single window AC. It is not generous for the way Cupertino lives now: this neighborhood has one of the highest EV adoption rates in the entire Bay Area, and the same homeowners are also adding heat pumps, induction cooktops, and full home offices. The Rancho Rinconada Eichlers add a real twist on top of that load problem. Joseph Eichler designed those homes with post-and-beam ceilings, no attic to reroute through, radiant slab heat, and frequently aluminum branch wiring, so the panel cannot just be swapped on the wall without planning around how the house is actually built. Fox Electric upgrades these Cupertino services to a modern 200-amp panel sized with a real load calculation, so there is headroom for the next EV or the next heat pump, and we do it without tearing up an Eichler that was never meant to be opened from above.

Permits & utility in Cupertino

Electrical service for Cupertino is provided by PG&E, and the electrical permit and inspection go through the local building department. We pull the permit and coordinate the PG&E service work as part of the job.

Cupertino sits in standard PG&E territory, so the service disconnect and reconnect is coordinated with PG&E while the permit runs through the City of Cupertino Building Division. The bigger local variable is the housing. Ranch homes in Monta Vista and Oak Valley usually have an easy exterior panel location, but Rancho Rinconada Eichlers often put the panel on a slab-side exterior wall with no interior path to fish new circuits, so we plan the service around the slab and outside walls. Given the city's EV density, we also size most upgrades for charging headroom from the start.

Pricing depends on your home and scope — we give a free on-site estimate with a written, fixed price before any work starts. For typical Bay Area ranges, see our guide on what a panel upgrade costs in the bay area.

What's Included

Electrical Panel Upgrades in Cupertino

Load calculation to size the new service correctly

New 200A main panel (Eaton, Square D, or Siemens) and meter coordination

Federal Pacific / Zinsco fire-risk panel replacement

Sub-panel additions for garages, ADUs, and EV circuits

City permit pulled and electrical inspection closed out

Every circuit labeled and the panel directory typed

How We Handle Electrical Panel Upgrades in Cupertino

Straightforward, permitted, and clean — from your first call to final sign-off in Cupertino.

Load Assessment

A licensed Fox electrician runs a load calculation and gives you a written fixed-price quote — no surprises.

Permit & Utility Scheduling

We pull the city electrical permit and schedule the service disconnect/reconnect with your utility.

Install Day

Power off, old panel out, new 200A service in, every circuit relabeled — usually one working day.

Inspection & Reconnect

City inspection passed, utility reconnects, and you keep the permit closeout for resale.

Recent Project

200A Panel Upgrade — Cupertino200A Upgrade

A Cupertino homeowner needed more capacity for an EV charger and a future heat pump, but the home was still on its original 100A service. We ran a load calculation, pulled the city permit, coordinated the PG&E service window, and installed a 200A panel — every circuit relabeled and the directory typed, powered back up the same day.

Before: Original 100A service, no room to grow
After: 200A panel sized for EV + heat pump headroom
Coordination: PG&E disconnect/reconnect + city inspection handled
Outcome: Passed inspection, permit closed out for resale

The Fox Difference

Why Cupertino Chooses Fox Electric

Local to Cupertino

Based in San Carlos — 18 min away. We know Cupertino homes, PG&E coordination, and the local permitting.

Licensed & Insured

CSLB #1145945 — fully licensed C-10 contractor and bonded. Every job permitted and inspected to current code.

Permits & Utility Handled

We pull the Cupertino permit, coordinate PG&E service work, and close out the inspection — you schedule one day, we do the rest.

5.0★ on Google

We earn the rating on every visit, not just the first.

Upfront, Fixed Pricing

Free on-site estimate with a written fixed-price quote before any work starts. No obligation, no surprises.

Same-Day Availability

We hold same-day slots open for Cupertino homeowners when something can't wait.

Questions

Electrical Panel Upgrades in Cupertino — FAQ

My Cupertino ranch home still has its original 100-amp panel. Is that the problem with my EV plans?

Usually yes. Most 1960s and 70s Cupertino ranch homes were built with 100-amp service that is already close to full once you add modern HVAC and a home office. Before we quote an upgrade we run a load calculation to confirm it, because sometimes a load-management device gets you charging without a full panel swap. If you are also planning a heat pump or induction range, 200 amps is usually the smarter call.

Can you upgrade the panel on a Rancho Rinconada Eichler without damaging the ceilings?

Yes, and this is exactly the kind of home where it matters. The Eichlers in Rancho Rinconada have post-and-beam roofs, radiant slab heat, and no attic, so there is nowhere to hide a wire run overhead. We plan the new service and any added circuits around the slab and exterior walls instead of cutting into those ceilings. It is the way these specific homes have to be wired.

Does a Cupertino panel upgrade go through PG&E or the city?

Both, in their own roles. Cupertino is PG&E territory, so PG&E handles the service disconnect and reconnect at the meter, while the electrical permit and inspection run through the City of Cupertino Building Division. We pull the permit, schedule the PG&E window, and attend the inspection, so you are not chasing two agencies yourself.

How long is my power off during a Cupertino panel upgrade?

Typically one working day. Power is off while we remove the old panel and set the new 200-amp service, PG&E handles the disconnect and reconnect, and the city inspects before final re-energization. We line up the PG&E window ahead of time so you can plan around a single day rather than an open-ended outage.

Will a townhome near Stevens Creek Boulevard need a panel upgrade for EV charging?

Often not. The newer townhome developments along Stevens Creek tend to have modern panels with some spare capacity, so the work is usually adding a dedicated charging circuit rather than replacing the panel. We confirm with a load calculation, and where an HOA or shared garage is involved we work out the metering and routing before any wire is run.