21 kW Whole-House Standby in Shrewsbury, NJ | A Second Generator After a Move

Shrewsbury, NJ · Client since April 2023

Joseph from Shrewsbury, NJ has been a Green Sun Energy Services client since April of 2023. This is a second generator rather than a first: one went in at the previous house in Middletown in 2020, and on moving here the household had another installed, this one on our top-tier plan with an annual visit, an extended parts-and-labor warranty and remote monitoring we manage directly. The Shrewsbury machine was commissioned that July, rated 21 kW on natural gas against a load calculation asking for 19 kW, with five load-management modules and a surge protective device on a 200-amp service. Three sump pumps sit on the load, which tells you what the ground under a 4,000 square foot house is doing. The Middletown installation is written up here.

Project Facts

Location
Shrewsbury, NJ
Services
Standby Generator Installation, Standby Generator Service
Client since
April 2023
Manufacturer
Generac Model # 7209
Rated output
24 kW LP / 21 kW NG
Fuel
Natural Gas
Electrical service
200 amp
Transfer switch
200 amp
Load management
Managed Whole House

Standby generator questions from Shrewsbury homeowners

Why do outages last longer on some Shrewsbury streets than others?

Mature tree cover over overhead lines is the usual reason. Limbs coming down in wind, snow or ice take the lines with them, so heavily treed streets tend to see both more frequent outages and longer restoration times than open ones. It is one of the honest arguments for standby power rather than a portable generator.

Can the existing natural-gas service in a Shrewsbury home supply a generator?

Often yes, but the gas system has to be evaluated first. The review covers the generator's BTU demand, meter capacity, available pressure, regulator capacity, pipe diameter and length, and every other gas appliance in the house -- furnace, boiler, water heater, range and fireplace among them.

Will a 22 kW generator run an entire Shrewsbury 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.

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