Richard from Middletown, NJ has been a Green Sun Energy Services client since November of 2020. The generator was commissioned in November of 2021: a Generac Guardian rated 21 kW on natural gas, outdoors beside the meter, on a 400-amp service-entrance switch with two smart management modules. A 400-amp service is unusual on a house, and the load calculation shows why this one has it – 4,000 square feet carrying two sump pumps, a double electric oven, two refrigerators, a washer, an electric dryer and a dishwasher, which came out at a 23 kW minimum. The management modules are what let a 21 kW machine cover a house that size, holding back the heaviest loads for a moment rather than splitting the house into essential and non-essential circuits from the start. The generator is supported by annual maintenance, an extended parts-and-labor warranty, and monitoring we manage.
Project Facts
- Location
- Middletown, NJ
- Services
- Standby Generator Installation, Standby Generator Service
- Client since
- November 2020
- Manufacturer
- Generac Model # 7209
- Rated output
- 24 kW LP / 21 kW NG
- Fuel
- Natural Gas
- Home sized for
- 4,000 sq ft
- Electrical service
- 400 amp
- Transfer switch
- 400 amp
- Load management
- Managed Whole House
Standby generator questions from Middletown homeowners
Will a 24 kW generator run an entire Middletown house?
For many homes, yes, but that does not mean every load can run at the same moment. Houses with two central air conditioners, electric heat, EV charging, pool equipment or electric cooking may need load management or a larger machine. The answer comes from a load calculation rather than from the phrase whole house.
Can we plant shrubs or put a fence around the generator?
Yes, provided the planting or fence stays outside the required airflow and service clearances. Site-selection guidance treats shrubs, bushes and trees as part of the clear space around the machine, and clearance should be measured against how the planting will grow rather than how it looks the week it goes in. Local zoning may separately require screening.
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.