Michael from Princeton, NJ has been a Green Sun Energy Services client since July of 2024. The generator was commissioned in September: 26 kW on natural gas, on a 200-amp service-entrance switch with three smart management modules and surge protection. This is the largest machine on the site, and the load calculation supports it – 22 kW across 5,500 square feet, with three sump pumps, an electric dryer and an electric oven on the list. Three pumps is not redundancy but capacity: a basement that needs three has water arriving faster than one or two can move it, and all three will be running in the storm that also takes the power out. Annual maintenance, an extended parts-and-labor warranty and monitoring we manage all sit behind the machine.
Project Facts
- Location
- Princeton, NJ
- Services
- Standby Generator Installation, Standby Generator Service
- Client since
- July 2024
- Manufacturer
- Generac Model # 7290
- Rated output
- 26 kW LP / 22.5 kW NG
- Fuel
- Natural Gas
- Home sized for
- 5,500 sq ft
- Electrical service
- 200 amp
- Transfer switch
- 200 amp
- Load management
- Managed Whole House
Standby generator questions from Princeton homeowners
What is a service-entrance-rated transfer switch?
One that is listed for use as service equipment when installed in the appropriate configuration. These are commonly used for whole-house systems, where the transfer switch becomes part of the home's service arrangement rather than sitting downstream of it.
What size standby generator does a Princeton home need?
The correct size is decided by the electrical loads the generator is expected to run, not by the square footage of the house. Central air, heat pumps, electric heat, well and sump pumps, refrigerators and freezers, electric ranges and dryers, pool equipment and EV chargers all count. Where a load is connected automatically, the generator either has the capacity for it or an approved load-management system controls it.
Should gas pressure be checked while the generator is running?
Yes. Operating pressure means more than a static reading taken with the generator off. The fuel system has to hold adequate pressure while the generator runs and other appliances may also be drawing gas. That matters most when an existing residential service is being reused.