Electrical Panel Upgrades · Sunnyvale, California

Electrical Panel Upgrades in Sunnyvale, 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 Sunnyvale Homes

Sunnyvale's panel problem is really two problems wearing one city's name. In Cherry Chase and Ponderosa Park, the Eichlers built in the 1950s and 60s came with modest service and original aluminum branch wiring, and their post-and-beam construction means there's no attic to reroute through when you start adding load. In the tract neighborhoods like Birdland and Lakewood Village, the issue is simpler but just as common: undersized panels that were fine for a 1960s household and are now stretched thin by a houseful of tech professionals charging EVs, running heat pumps, and cooking on induction. Sunnyvale has more dual-income, high-draw households than almost anywhere, and the old service just doesn't have the headroom. Fox Electric upgrades these services to a modern 200-amp panel, sized with a real load calculation so there's room for whatever you add next. On the Eichlers we plan the work around the slab and exterior walls rather than fishing through those open-beam ceilings, and where we find aging aluminum behind the panel we tell you about it instead of pretending the new box solves everything. The goal is a panel that fits how you actually live in this house, not just a shinier cover on the wall.

Permits & utility in Sunnyvale

Electrical service for Sunnyvale 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.

A Sunnyvale panel upgrade runs through PG&E for the service disconnect and reconnect, and the City of Sunnyvale Community Development Department for the electrical permit and inspection. We coordinate the PG&E window and the city inspection so your power is off for as little as possible. The wrinkle here is the housing split: Eichlers in Cherry Chase and Ponderosa Park often have the panel on an exterior wall with no easy interior rerouting and radiant ceiling heat overhead, while the Birdland and Lakewood Village tract homes are more straightforward. We scope each accordingly rather than quoting a one-size job.

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 Sunnyvale

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 Sunnyvale

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

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 — Sunnyvale200A Upgrade

A Sunnyvale 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 Sunnyvale Chooses Fox Electric

Local to Sunnyvale

Based in San Carlos — 18 min away. We know Sunnyvale 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 Sunnyvale 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 Sunnyvale homeowners when something can't wait.

Questions

Electrical Panel Upgrades in Sunnyvale — FAQ

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

Both, in different roles. PG&E handles the actual service disconnect and reconnect at the meter, while the City of Sunnyvale Community Development Department issues the electrical permit and runs the inspection. Fox Electric schedules the PG&E window and books the city inspection for you, so you're not chasing two agencies yourself.

Can you upgrade the panel on a Cherry Chase Eichler without tearing up the open-beam ceilings?

Yes, and that's exactly why an Eichler panel upgrade needs someone who knows these homes. With post-and-beam construction there's no attic and the radiant heat sits in the ceiling, so we route the service and any new circuits along the slab and exterior walls instead of fishing overhead. We work this way regularly in Cherry Chase and Ponderosa Park.

My Birdland tract home still has the original panel and we just bought an EV. Do we need 200 amps?

Often yes, but we confirm it with a load calculation before quoting an upgrade. Sometimes a load-management device lets you add the charger without a full panel swap. If you're also eyeing a heat pump or induction range, going to 200 amps usually makes the next install plug-and-play, so we size it for what you're actually adding.

Will my Sunnyvale Eichler need rewiring along with the panel?

Sometimes. Many of the Cherry Chase and Ponderosa Park Eichlers still carry original aluminum branch wiring, which can be a fire and connection risk. We assess it during the load walkthrough and tell you honestly whether the panel upgrade stands on its own or whether some of that wiring should be addressed too, without pushing a full rewire you don't need.

How long is the power off for a panel upgrade in Sunnyvale?

Usually one working day. Power is off while we swap the panel and PG&E handles the disconnect and reconnect, then the city inspects before final re-energization. We line up the PG&E window in advance so you can plan around a single day without power instead of an open-ended outage.