How long does a panel upgrade take?

Most residential 100A-to-200A heavy-ups are completed in a single day, with power off for roughly 4–8 hours.

Do I need a permit for a panel upgrade?

Yes - every jurisdiction in MD, DC, and VA requires a permit and final inspection for service-equipment work. We handle both.

How do I know if I have a Federal Pacific or Zinsco panel?

Federal Pacific Stab-Lok panels usually say 'FPE' or 'Stab-Lok' on the cover. Zinsco panels often have colored breaker handles (red, blue, green). Send us a photo and we'll confirm.

Are you licensed to do panel upgrades in Potomac, MD?

Yes. Pirro Electric is fully licensed and insured to perform commercial and residential electrical work in Maryland, Virginia, and Washington, D.C., including Potomac. We pull all required permits and coordinate inspections with the local jurisdiction on every job.

Do you handle aluminum wiring remediation in Potomac?

Yes. Aluminum wiring remediation is one of our specialties for multi-unit buildings, condos, and single-family homes built in the late 1960s and 1970s throughout Potomac and the broader DMV. We rewire to copper, replace outdated panels, and document everything for insurance carriers.

Potomac, MD

Panel Upgrades in Potomac, Maryland

200-amp upgrades, heavy-ups, sub-panels, and Federal Pacific & Zinsco replacements - done to code and inspected.

Request a Free Quote (240) 510-3131

Licensed & insured 5.0 ★ on Google Family-owned since 2003

DC Electrical Contractor #EM-40-0001168 · MD Master Electrician #7987 · VA Class A Contractor #2705198087 · EPA & OSHA Certified

Panel Upgrades & Heavy-Ups in Potomac, MD - Pirro Electric

Pirro Electric brings 23 years of Maryland electrical experience to every panel upgrades job in Potomac. Potomac is dominated by large single-family estates with high electrical demands: indoor pools, geothermal and dual-zone HVAC, whole-home generators, exterior lighting on long driveways, and increasing demand for multi-vehicle EV charging.

On any given month you'll find our trucks handling 400-amp service upgrades across River Falls, Bradley Farms, Falconhurst, and Glen Hills. We pull permits in Potomac, schedule inspections, and walk you through the work so nothing gets left to guess.

Local Angle

Common Panel Upgrades & Heavy-Ups Projects in Potomac

Between jobs around Cabin John Regional Park and the neighborhoods above, our Potomac crew is on the road every week.

400-amp service upgrades

Neighborhoods servedRiver Falls · Bradley Farms · Falconhurst · Glen Hills

ZIP codes20854

Scope of Work

What's Included

Every job in Potomac comes scoped, permitted, and inspected - no shortcuts.

100-amp to 200-amp service upgrades ("heavy-ups")
Federal Pacific Stab-Lok panel replacement
Zinsco panel replacement
Main breaker panel and meter base swaps
Sub-panel installation for additions and detached structures
Whole-home surge protection at the panel
Panel relabeling and circuit mapping
AFCI and GFCI breaker upgrades

FAQ

Panel Upgrades & Heavy-Ups in Potomac - Common Questions

Reviews

What Customers Say

Excerpts from verified Google reviews of Pirro Electric.

"If you're thinking of going with Pirro - do it. You won't be sorry. I run a medium-sized HOA and wouldn't use any other company for our electric."

Amanda S.

Google Review · HOA Board Director

"We use Pirro across our portfolio of 50+ commercial retail buildings. Excellent work, responsive, priced competitively, and they get it right the first time."

Timothy M.

Google Review · Commercial Property Manager

"Pirro re-wired my whole townhouse, updated the panel, and replaced every outlet and switch. Professional, friendly, and on time. Couldn't ask for a better company."

JMW

Google Review · Verified Homeowner

Read all reviews on Google

Nearby Areas We Serve

Same panel upgrades & heavy-ups crew, next town over.

Panel Upgrades in Bethesda, MD Panel Upgrades in Rockville, MD Panel Upgrades in Great Falls, VA Panel Upgrades in Gaithersburg, MD

Related Services in Potomac

Often booked alongside panel upgrades & heavy-ups.

Ready to Get Started in Potomac?

Free written quotes. Licensed & insured. Same-week scheduling for most projects.

Request a Quote (240) 510-3131