Do you sell generators or just install them?

We're an installation contractor, not a dealer. You can buy from any reputable supplier; we recommend Generac and Kohler for standby units.

How long does install take?

Most whole-home standby installs are 1–2 days of electrical work, plus a separate gas hookup and a county inspection.

Will the generator run my whole house?

Depends on the size. A 22 kW unit will run most 2,000–3,000 sq ft homes including A/C. Smaller units use a sub-panel for essentials only.

Are you licensed to do generator install in Rockville, MD?

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

Do you handle aluminum wiring remediation in Rockville?

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 Rockville and the broader DMV. We rewire to copper, replace outdated panels, and document everything for insurance carriers.

Rockville, MD

Generator Install in Rockville, Maryland

Standby generators, portable inlet boxes, and automatic transfer switches - installed 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

Generator Installation in Rockville, MD - Pirro Electric

Looking for generator install in Rockville, MD? Pirro Electric is a family-owned electrical contractor 20+ years into serving the DMV, and Rockville has been part of our route since we opened in 2003.

Our Rockville portfolio spans 200-amp panel upgrades in 1960s split-levels and aluminum-to-copper rewiring in townhome communities - plus everyday panel work, outlet repair, and lighting across College Gardens, Hungerford, Lincoln Park, and Rockshire. Standby generators, portable inlet boxes, and automatic transfer switches - installed and inspected.

Local Angle

Common Generator Installation Projects in Rockville

Between jobs around Rockville Pike commercial corridor and the neighborhoods above, our Rockville crew is on the road every week.

200-amp panel upgrades in 1960s split-levels
Aluminum-to-copper rewiring in townhome communities

Neighborhoods servedCollege Gardens · Hungerford · Lincoln Park · Rockshire

ZIP codes20850 · 20851 · 20852 · 20853 · 20855

Scope of Work

What's Included

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

Whole-home standby generator installation (Generac, Kohler, Briggs)
Automatic transfer switch (ATS) installation
Portable generator inlet boxes and manual transfer switches
Pad pouring and equipment placement coordination
Coordination with gas plumbers for natural gas / propane hookup
Load calculations and circuit prioritization
Generator service circuits and battery maintenance
Permitting and county inspection

FAQ

Generator Installation in Rockville - Common Questions

Reviews

What Customers Say

Excerpts from verified Google reviews of Pirro Electric.

"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