Green Sun Energy Services installed a Generac standby generator at a home in Atlantic Highlands for a client since June of 2024, with the machine commissioned the following month. This one runs the whole house rather than a selected group of circuits: the automatic transfer switch is rated at 200 amps and carries the full service, so nothing has to be chosen in advance and nothing is left off during an outage. Sizing came from the load survey rather than the square footage. The 2,650 square foot house has a gas dryer and washer, two refrigerators, a freezer, a dishwasher, two microwaves and a sump pump, which set a minimum of 16 kW under the National Electrical Code; the installed unit delivers 21 kW on natural gas, leaving headroom above the calculated figure. The gas load was worked out at 676 cubic feet per hour in total, generator included, so the meter and line could carry the machine alongside everything else. The sump pump matters more than it sounds this close to the bayshore, since the weather that takes the power out is usually the weather filling the basement. The service plan covers annual maintenance, an extended parts and labor warranty, and remote monitoring managed by Green Sun.
Project Facts
- Location
- Atlantic Highlands, NJ
- Services
- Standby Generator Installation, Standby Generator Service
- Client since
- June 2024
- Manufacturer
- Generac Model # 7209
- Rated output
- 24 kW LP / 21 kW NG
- Fuel
- Natural Gas
- Home sized for
- 2,650 sq ft
- Electrical service
- 200 amp
- Transfer switch
- 200 amp
- Load management
- Managed Whole House
Standby generator questions from Atlantic Highlands homeowners
How close to the house can a generator sit in Atlantic Highlands?
For the air-cooled models covered by the manufacturer's listed installation guidance, the rear of the generator can be as close as eighteen inches to a qualifying structure when every condition of that listing is met. That eighteen inches is a tested installation dimension, not a zoning setback, and a municipality can require more.
Does a 200-amp service need a 200-amp transfer switch?
A transfer switch installed in the service path has to be rated appropriately for the service and the configuration. A 200-amp service commonly uses a 200-amp service-rated switch, but the actual design is confirmed by the electrician rather than assumed from the service size.
What happens when the utility power comes back?
The system detects the return of acceptable utility power and transfers the house back automatically. The generator then runs through a programmed cool-down before shutting off and returning to standby. Nobody has to switch anything back by hand.