100–200 amp panel upgrades & breaker box replacement in Fontana, San Bernardino County. Local electricians, upfront pricing and fast scheduling.
(833) 652-8933 Request a quoteOlder homes in Fontana were wired for a different era. Add an EV charger, a heat pump, an induction range or an ADU and a 100 amp panel runs out of room fast. Phasethree Electric handles electrical panel upgrades in Fontana from permit to final inspection, including 100 amp to 200 amp service upgrades, breaker box replacement, fuse box replacement and sub panel installation.
Breakers that trip when two appliances run, warm or buzzing panel covers, a fuse box instead of breakers, no open slots, rust or scorch marks, or a brand with a known failure history such as Federal Pacific, Zinsco or Sylvania. Insurance carriers and buyers in San Bernardino County often flag these panels during a sale.
New main breaker panel, new grounding and bonding to current code, labeled circuits, meter socket and service entrance work coordinated with the utility, permit and city inspection. Where you want to keep the existing panel we can add a sub panel for a garage, workshop, ADU or EV charger.
Cost depends on amperage, whether the meter and service entrance need replacing, and how the utility feeds the property. We give a fixed written price after a short on-site evaluation. Call (833) 652-8933 to schedule one in Fontana or nearby Bloomington, Rialto, Riverside, Mira Loma.
We provide electrical panel upgrade throughout Fontana and the surrounding communities of San Bernardino County.
Most residential panel replacements are completed in a single day, with power off for roughly four to eight hours.
Yes. Panel replacements in Fontana require an electrical permit and inspection. We pull the permit and meet the inspector.
For nearly every home in Fontana, yes. 200 amp service comfortably supports a Level 2 EV charger, solar back-feed, heat pump and a modern kitchen.
“Smart switches finally work because they added neutrals at every box. Should have called them first instead of trying myself.”
Nina P.“Quoted me a firm price for recessed lighting in the kitchen and living room and the invoice matched to the dollar. Lights look fantastic.”
James O.“Whole house surge protector installed in under an hour. Peace of mind after the last PSPS event fried our garage opener.”
Ellen T.Upfront pricing · Same-day service · 24/7 emergency response