Electrical Panel Upgrade in San Jose
Upgrade, Replacement & Repair

A licensed electrician performs a load calculation to determine this definitively — but several warning signs point to a likely need: breakers that trip frequently, lights that flicker when large appliances turn on, buzzing or burning smells near the panel, a panel rated at 100A or less, no open slots for new breakers, a hazardous panel brand like Federal Pacific or Zinsco, or plans to add major new loads like an EV charger or solar. Most homes built in the last 30 years with 200A service are in good shape. Homes built before the 1980s with original panels are the most likely to need an upgrade.

Panel upgrade costs at Cali Rollin Electric in Santa Clara County: a 100A to 200A service upgrade runs $7,000–$9,000. A 200A upgrade requiring meter relocation runs $8,000–$15,000. An exact panel replacement at the same amperage runs $5,500–$6,000. Subpanel replacement runs $1,200–$2,000. Permits vary by city and typically add $500–$1,000. All pricing is provided in a written quote after a full assessment — no surprises after the job starts.

The physical work takes 4–8 hours for a standard residential panel swap. With a crew of two to three electricians, most jobs are completed in a single day. The full project timeline including permitting and inspection typically spans one to two weeks for San Jose: permit approval takes 3–10 business days, installation takes 4–8 hours on-site, and final inspection is scheduled 1–3 days after installation.

Yes — always. Every electrical panel upgrade, service entrance change, or meter-main replacement in San Jose and all of Santa Clara County requires a permit. Skipping the permit can void your homeowner's insurance, create problems when selling or refinancing, and result in fines or code enforcement. Cali Rollin Electric handles the entire permit process on your behalf through SJPermits.org.

Yes — for approximately 4–8 hours on the day of installation. Power is shut off at the main breaker while the work is performed. Refrigerated food is generally fine for up to 4 hours if you keep the fridge closed. Charge devices and laptops before the scheduled outage day. Cali Rollin Electric coordinates the PG&E disconnect and reconnect scheduling so the outage window is as predictable and short as possible.

Not always — it depends on a load calculation. A 200A panel with gas appliances and open slots typically does not need an upgrade. A 100A panel likely does. If an upgrade is needed alongside an EV charger install, Cali Rollin Electric offers panel upgrade as an add-on starting at $5,500–$8,000. Rather than assuming you need an upgrade, we run a load calculation during the free estimate to give you a precise answer. In many cases a smart EV charger with Dynamic Load Balancing can be installed without a panel upgrade.

A panel upgrade increases your service capacity — most commonly from 100 amps to 200 amps — and involves a new main breaker, panel, and often a new meter base and service entrance. A panel replacement is a same-amperage swap: the existing service stays at, say, 100A or 200A, but a damaged, obsolete, overheating, or hazardous panel (like Federal Pacific or Zinsco) is replaced with new code-compliant equipment. Replacement runs $5,500–$6,000 because the service capacity isn't changing; an upgrade runs $7,000–$9,000 because the heavier service entrance, larger conductors, and utility coordination add scope. During the free assessment, Cali Rollin Electric runs an NEC 220.87 load calculation to tell you which one your home actually needs — many homes only need a replacement, not a full upgrade.

For most single-family homes in San Jose, 200A is plenty — it comfortably carries an EV charger, heat pump HVAC, induction cooking, and a subpanel. A 400A service is usually only warranted for large homes (roughly 4,000+ sq ft), homes adding multiple EV chargers, a large ADU or second dwelling unit on the same meter, or an all-electric conversion with high simultaneous demand. A 400A upgrade is a larger job — it typically requires a 400A meter-main, dual 200A panels or a 400A panel, larger underground or overhead conductors, and closer PG&E coordination. Cali Rollin Electric sizes the service to your actual NEC 220.87 calculated load rather than over-building, so you don't pay for capacity you'll never use.

Most of San Jose is served by PG&E (a few South Bay pockets are served by Silicon Valley Power in Santa Clara or CPAU in Palo Alto). For a standard 100A-to-200A upgrade where the meter stays in place, PG&E performs a service disconnect on installation day and a reconnect after the city inspection passes — Cali Rollin Electric schedules both so your outage window stays short. When the work involves relocating the meter, increasing to a 400A service, or converting an overhead drop to an underground lateral, the project goes through PG&E's Building & Renovation Services group, which reviews the service plan and can add several weeks to the timeline. We file that application, coordinate the field meeting, and pull the city permit so the utility and inspection steps line up. You don't make a single call to PG&E — we manage the entire process.