Generac RXG24SHA1 100A 24-Circuit Load Center Service-Entrance Automatic Transfer Switch (NEMA 1)
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At a glance
- Amperage
- 100A (100A main circuit breaker)
- Voltage/Phase
- 120/240V single-phase, 60 Hz
- Service Entrance Rated
- Yes (service equipment rated)
- Enclosure
- NEMA 1 indoor, flush-mount powder-coated steel
- Circuits
- 24-space load center, expandable to 40 circuits with tandem breakers
- Transition Type
- Open transition, automatic (service rated)
- Listings
- ETL listed for service equipment and consumer safety
- Withstand Rating
- 10,000A
- Lug Range
- #4 - 3/0 CU/AL 75 C
- Dimensions
- 45.14 in H x 15.5 in W x 4.84 in D
- Weight
- 47 lb (21.3 kg); 58 lb shipped
- Warranty
- 5-year limited
Why this generator
- All-in-one GenReady panel combines the 100A main breaker, automatic transfer switch, and 24-space load center in a single service-entrance-rated unit
- Whole-house 120/240V single-phase backup coverage, expandable to 40 circuits using tandem breakers
- Built-in load management controls 4 individual HVAC loads standard, expandable to 8 loads with optional Smart Management Modules (SMM)
- Multi-listed to accept Siemens, Murray, Square D, and Eaton 1-inch breakers, including GFCI, AFCI, and tandem types
- Flush-mount NEMA 1 steel indoor enclosure with baked powder-coat finish, ideal for new construction or panel upgrades
- Pairs with Generac standby generators using Evolution or Nexus controllers and includes a 5-year limited warranty
Everything you need to know
Generac RXG24SHA1 100a 24-circuit load center service-entrance automatic transfer switch (NEMA 1 enclosure). 120/240V single-phase, designed to pair with Generac air-cooled home standby generators.
Genuine Generac unit from a factory-authorized dealer. Free shipping to the lower 48. Professional installation available in NC & SC.
Frequently asked questions
Is this a genuine OEM part?+
Yes — sold and shipped as a genuine Generac part from a factory-authorized dealer.
Will it fit my unit?+
Check your model and year — message us with that info and we'll confirm fit before you order.
How fast does it ship?+
Free shipping to the lower 48. Most accessories and parts ship within 2–4 business days.
What's the return policy?+
30-day returns on unused parts and accessories in original packaging.
Free curbside shipping
Liftgate delivery to the lower 48. Most orders leave the warehouse in 3–5 business days.
Install help, no upsell
We size, spec, and connect you with a vetted local installer — or talk your contractor through it for free.
Real Cummins warranty
Full 5-year / 2,000-hour limited warranty — registered and supported through Cummins directly.