Generator Services in Greenburgh, NY: Repair, Installation and Maintenance

Generator Sales and Service for Homes and Commercial Properties

National Standby Repair provides generator installation, repairs, maintenance, testing, rentals, and emergency support throughout Greenburgh and nearby areas of Westchester County. Since 1981, our team has worked on backup power systems for homeowners, medical facilities, apartment buildings, schools, offices, restaurants, and other commercial sites. Our technicians service equipment from Generac, Kohler, Cummins, Onan, Briggs & Stratton, WINCO, and many other manufacturers. Call us for help with a new installation or an existing system that needs service.

New Generator Installation

Whole-House Generator Installation

National Standby Repair reviews the property before recommending a residential system. We look at electrical demand, fuel availability, service access, placement options, and the equipment you want to keep running during an outage. That may include heating, cooling, refrigeration, pumps, lighting, or medical equipment. Once we understand the load, we can recommend an appropriately sized generator and coordinate the installation, startup, and testing.

Commercial Generator Installation

Commercial properties often need a more involved installation plan because the loads are larger and the equipment may support several building systems at once. We install standby generators for offices, medical facilities, apartment buildings, schools, restaurants, municipal properties, and other sites in Greenburgh. Our team can review the electrical demand, fuel source, transfer equipment, and generator location, then coordinate with qualified electricians, plumbers, or gas contractors where additional work is required.

Generator Sales From Major Manufacturers

We sell generators from Generac, Kohler, Cummins, Onan, Briggs & Stratton, WINCO, and other established manufacturers. The right model depends on the property and the job it needs to do. Fuel type, load demand, available space, access for future service, and system controls can all affect the recommendation. Our team compares those factors before suggesting equipment.

Generator Repair and Preventative Service

Repair for Residential and Commercial Systems

Our technicians diagnose generators that will not start, shut down unexpectedly, produce weak output, or display fault codes. We also work on battery problems, fuel-delivery issues, control failures, sensor faults, alternator trouble, and automatic transfer switch problems. National Standby Repair services residential and commercial systems from many manufacturers, including older equipment that may require more detailed troubleshooting. We also provide qualified warranty repair service for several major brands.

Scheduled Generator Maintenance

A maintenance visit gives our technicians a chance to review the condition of the system before the next outage. Service may include oil and filter changes, battery testing, coolant or fluid checks, transfer switch review, exercise-cycle testing, and a broader inspection of the enclosure and wiring. Customers who want ongoing service can also ask about an annual service contract for scheduled maintenance and priority support.

Emergency Generator Repairs

National Standby Repair provides 24/7 emergency generator service throughout our service area. We respond when a system fails during an outage, loses output, overheats, develops a fuel problem, or stops transferring power to the building. Our technicians work on home standby units and larger commercial equipment used by medical facilities, multifamily properties, and other sites where backup power needs to be restored quickly.

Commercial Generator Testing and Fuel Service

Load Bank Testing

Load bank testing places a generator under controlled electrical demand so our technicians can see how it performs beyond a simple exercise cycle. During the test, we can review voltage, frequency, cooling performance, engine response, oil pressure, fuel pressure, and control behavior. The test may reveal weak performance that is not obvious when the unit runs without a meaningful load. It can also help address wet stacking in lightly loaded diesel generators.

Fuel Testing and Fuel Polishing

Stored diesel fuel can degrade and collect water, sediment, sludge, bacteria, and other contaminants. Those problems may affect filters, injectors, and engine performance when the generator is called into service. National Standby Repair provides on-site fuel testing to assess the condition of the supply. If treatment is appropriate, we can provide filtration, scrubbing, or polishing instead of immediately replacing all of the stored fuel.

Commercial Generator Rentals

Temporary Generator Rentals From 20 kW to 500 kW

National Standby Repair rents commercial generators from 20 kW to 500 kW for outages, construction work, planned shutdowns, utility delays, temporary facilities, and equipment replacement. Available rental equipment includes units from Cummins, CAT, and WhisperWatt. We work with contractors, facility managers, municipalities, medical providers, and other organizations that need temporary power for a few days or for a longer assignment.

Support for Delivery, Setup and Service

The right rental starts with the load the site needs to support. Our team can help determine the required capacity, plan for placement, and coordinate setup. We also provide maintenance and service during extended rental periods, so the unit can remain supported while it is in use.

Generator Service for Different Types of Properties

Homes in Greenburgh

Homeowners can call National Standby Repair for new generator sales, installation, repairs, and long-term maintenance. We also work on systems installed by other companies, including older units that may still be worth repairing. Ongoing service can include battery replacement, fluid and filter changes, transfer switch checks, exercise-cycle review, and troubleshooting when the generator begins to show warning codes or inconsistent performance.

Medical, Multifamily and Commercial Facilities

Our technicians work on generators used by medical offices, assisted living facilities, apartment buildings, schools, offices, dealerships, restaurants, warehouses, municipal buildings, and other commercial properties. These systems may support HVAC equipment, pumps, refrigeration, security systems, communications equipment, or other building functions during an outage. We can help with installation, maintenance, repairs, testing, emergency service, and temporary power.

Service for Major Generator Brands

Generac and Kohler Generator Service

National Standby Repair installs, repairs, and maintains Generac and Kohler systems for residential and commercial customers. We also provide qualified warranty repair service for both brands. If you already have a Generac or Kohler generator, our technicians can diagnose startup problems, fault codes, transfer switch issues, battery failures, and other operating problems. We can also help if you are comparing new equipment for a home or commercial property.

Cummins, Onan, Briggs & Stratton, WINCO and More

Our service experience extends well beyond two manufacturers. We also work on Cummins, Onan, Briggs & Stratton, WINCO, ASCO, Avtron, Caterpillar, Kubota, Volvo Penta, and many other brands. This wider service range is useful for commercial facilities and older properties where the existing generator may not match the equipment a newer installer currently sells.

Serving Greenburgh and Nearby Westchester County Communities

National Standby Repair serves customers throughout Greenburgh and nearby communities such as White Plains, Tarrytown, Elmsford, Ardsley, Dobbs Ferry, Hastings-on-Hudson, Irvington, Scarsdale, and Mount Pleasant. From our location in Cold Spring, our technicians work throughout Westchester County and the broader Hudson Valley. We also serve customers in Rockland, Putnam, Dutchess, and Orange counties, along with western Connecticut and North Jersey.

Frequently Asked Questions

What Generator Brands Do You Service in Greenburgh?

National Standby Repair services Generac, Kohler, Cummins, Onan, Briggs & Stratton, WINCO, ASCO, Avtron, Caterpillar, Kubota, Volvo Penta, and many other manufacturers. Our technicians work on residential and commercial systems across a broad range of ages, sizes, and fuel types.

Do You Install Whole-House Generators?

Yes. We sell and install whole-house standby generators for homes in Greenburgh and throughout the surrounding area. Our team reviews electrical demand, fuel availability, generator placement, and the equipment you want to keep powered before recommending a system.

How Often Should a Standby Generator Be Serviced?

Most standby generators should receive professional maintenance at least once per year, although manufacturer guidance, fuel type, system age, and usage can change the schedule. Equipment that runs for many hours during an outage may need service sooner.

Can You Repair a Generator During an Outage?

Yes. National Standby Repair provides 24/7 emergency generator service throughout our service area. Our technicians can respond to startup failures, shutdowns, loss of output, fuel problems, transfer switch faults, and other issues that keep a generator from operating properly.

What Is the Purpose of Load Bank Testing?

Load bank testing places the generator under controlled electrical demand so a technician can evaluate how it performs under load. The test can reveal weak output, unstable voltage or frequency, cooling problems, and other issues that may not appear during a normal exercise cycle.

Do You Provide Commercial Generator Rentals?

Yes. We rent commercial generators from 20 kW to 500 kW for outages, construction work, planned shutdowns, temporary facilities, utility delays, and equipment replacement. Our team can help with sizing, setup, service, and removal.

Schedule Generator Service in Greenburgh

Call National Standby Repair at (914) 734-1400 for generator installation, repairs, maintenance, testing, rentals, or emergency service in Greenburgh. Tell us what equipment you have, what problem you are seeing, or what you need from a new system, and we can help you plan the next step.