Electrical Panel Inspection & Replacement
Bay Area's #1 Choice

What Is an Electrical Panel Inspection and When Does the Panel Need to Be Replaced?

An electrical panel inspection is a licensed electrician’s evaluation of the panel’s condition, wiring connections, and available capacity to confirm it’s safe and adequate for the home’s current electrical demand. Replacement, which we typically call a panel upgrade, becomes necessary when the panel is an older 100-amp unit that can’t support new loads like an EV charger or heat pump, or when the panel itself is a known hazard, such as a Federal Pacific Stab-Lok or Zinsco unit.

What a Licensed Electrician Checks During a Panel Inspection

During an inspection, we use thermal imaging to spot hot spots at breaker connections before they become a failure point, and torque test breaker terminals to confirm they’re tightened to spec rather than loosened from age or vibration. We also run a load calculation to determine whether the panel’s rated amperage can actually support the home’s current and planned electrical demand, including any EV charger or major appliance additions.

Signs Your Electrical Panel Is Outdated or Hazardous

A panel branded Federal Pacific Stab-Lok or Zinsco is a known fire hazard regardless of its current condition, and we recommend replacement on sight in older homes across Sunnyvale and Campbell where these brands are still common from 1960s and ’70s construction. Other warning signs include breakers that trip repeatedly without an obvious cause, warm or discolored panel covers, a persistent burning smell near the panel, or a 100-amp rating that can’t accommodate an EV charger or induction range you’re planning to add.

Electrical Panel Replacement: How the Process Works

Panel replacement starts with a load calculation and permit application, followed by equipment selection based on the home’s amperage needs, and finishes with a coordinated replacement day that typically requires a brief power shutoff. Most homeowners are without power for a few hours during the swap, not the full day.

Load Calculation, Permit, and Equipment Selection

We calculate the home’s total electrical load, factoring in HVAC, EV charging, and any planned additions, to determine whether a 200-amp panel meets the need or whether a larger service is warranted. Every panel upgrade requires a permit from the city’s authority having jurisdiction, and requirements vary — a panel upgrade in Belmont may have different inspection scheduling than one in Cupertino, so we handle the permit filing and coordinate the inspection directly.

What Happens on Replacement Day

On replacement day, we coordinate with PG&E to schedule the temporary power disconnect, remove the old panel, and install the new 200-amp panel along with any required grounding and bonding upgrades to meet current Title 24 and code requirements. The vast majority of Bay Area homes we work on have an overhead service drop from PG&E, and we keep that overhead connection during the upgrade in almost every case, since converting to an underground service lateral adds substantial trenching and utility coordination cost that isn’t necessary for a standard panel swap.

Electrical Panel Inspection & Replacement Cost in the Bay Area

Electrical panel inspection and replacement cost depends primarily on whether the job is an inspection alone or a full panel upgrade, and on the amperage jump involved. A 100-amp to 200-amp upgrade is our most common job and falls within a predictable range once the load calculation and permit scope are known.

Factors That Affect the Final Price

Price is driven by the new panel’s amperage rating, whether the meter base also needs replacement, how much rewiring is required to bring grounding and bonding up to current code, and city-specific permit fees. Homes in Saratoga and Palo Alto with older subpanels or knob-and-tube remnants sometimes require additional code-required updates beyond the panel itself, which affects the final scope.

When an Inspection Is Enough vs. When Full Replacement Is Required

An inspection alone is enough when the panel is a modern brand in good condition and simply needs verification for a home sale, permit, or insurance requirement. Full replacement is required when the panel is an identified fire hazard, is rated below what the home’s current or planned load demands, or has failed torque testing on multiple breaker connections.

Why Bay Area Homeowners Choose United HVAC, Plumbing & Electrical for Panel Work

Homeowners choose us because we handle the entire panel upgrade process — inspection, load calculation, permitting, and installation — under one license, without subcontracting pieces of the job out. Every quote reflects the actual amperage and code work the home needs, not a generic flat number.

Licensed, Insured, and Local

Our electricians are trained for panel work across the Bay Area and carry insurance that covers the property during the temporary power shutoff and panel swap. That matters because panel replacement involves working directly at the service entrance, and any complication during that window is covered rather than billed back to the homeowner.

25+ Years Serving Bay Area Homeowners

Our electricians and supervisors spent more than 25 years on electrical and heat pump-related upgrades across San Jose, Campbell, and the surrounding cities, which includes a steady volume of 100-amp to 200-amp panel upgrades tied to EV charger installs and heat pump conversions. That history means we know which cities’ AHJs move fast on panel permits and which ones require extra lead time for inspection scheduling.

Upfront Pricing and Same-Day Availability

Every panel inspection or replacement is quoted as a flat price after the load calculation, not an estimate that changes once the panel is opened up. If a component we installed during the upgrade fails within the guarantee period, we return and correct it at no additional labor charge.

Running an older 100-amp panel that can’t support an EV charger or new appliances? Call United HVAC, Plumbing & Electrical at (408) 539-6936 for a panel inspection or a same-day 200-amp panel upgrade quote anywhere in the Bay Area.