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 Gaithersburg, MD?

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

Do you handle aluminum wiring remediation in Gaithersburg?

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 We rewire to copper, replace outdated panels, and document everything for insurance carriers.

Gaithersburg, MD

Generator Install in Gaithersburg, 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 Gaithersburg, MD - Pirro Electric

Gaithersburg has one of the most varied building stocks in Montgomery County - historic Olde Towne homes, 1980s townhome clusters in Montgomery Village, mid-rise commercial along Frederick Road, and brand-new mixed-use at Crown and Watkins Mill. Each demands a different electrical playbook, from knob-and-tube replacement to high-density tenant fit-outs. That mix is exactly why Gaithersburg, Maryland property owners call Pirro Electric for generator install.

Standby generators, portable inlet boxes, and automatic transfer switches - installed and inspected. We serve Rio / Washingtonian, Olde Towne Gaithersburg, Quince Orchard, and Montgomery Village - and every other Gaithersburg neighborhood in between - with the same senior-electrician crews that handle our largest DMV projects.

Local Angle

Common Generator Installation Projects in Gaithersburg

Between jobs around Lakeforest area and the neighborhoods above, our Gaithersburg crew is on the road every week.

Generator installs in Quince Orchard estate homes

Neighborhoods servedRio / Washingtonian · Olde Towne Gaithersburg · Quince Orchard · Montgomery Village

ZIP codes20877 · 20878 · 20879 · 20882 · 20883 · 20884 · 20885 · 20886

Scope of Work

What's Included

Every job in Gaithersburg 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 Gaithersburg - 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