Generac 100 Amp Next Gen Automatic Generator Transfer Switch, SE Rated, SPD | Integrated Surge Protection Device, Service Entrance Rated, NEMA 3R Outdoor Enclosure, Fuse Control Board Generation

The Generac 100A Service Entrance Rated Automatic Transfer Switch with Integrated Surge Protection is engineered for homeowners who want seamless, whole-home backup power without manual intervention. Paired with single-phase Generac Home Standby generators running Evolution or Power Zone 200 controllers, this switch monitors your utility voltage around the clock and transfers your entire electrical service automatically when the grid goes down. Service entrance vs. non-service entrance: A service entrance rated switch replaces your main disconnect and handles your full 100A residential load, covering both 120V and 240V appliances such as well pumps, dryers, and HVAC systems. A non-service entrance switch is installed downstream of your main panel and requires separate utility disconnects. How backfeed is prevented: This unit uses an open-transition design, meaning it fully breaks the utility connection before the generator connection is made. This physical sequencing is what prevents dangerous backfeed into the power grid and protects utility workers. Whole-home surge protection included: A factory-wired Type 1/Type 2 SPD rated at 50 kA per phase is built directly into the enclosure, guarding your appliances and electronics from damaging transient voltage surges — no separate surge device required. GFCI and AFCI breaker compatibility: This switch is multi-listed for use with standard, tandem, GFCI, and AFCI breakers from Siemens, Eaton, Square D, and Murray up to 50A per circuit, so existing breakers typically do not need to be replaced. Expandable load management: Generac Smart Management Modules can be added to prioritize and shed lower-priority loads before your generator reaches its capacity limit. Installation note: Service entrance rated work involves replacing your main electrical disconnect and must be performed by a licensed electrician in compliance with NEC Article 702 and local codes. This switch is designed specifically for Generac standby generators and does not include a power inlet box or connecting cord. Protected by a 5-year limited warranty, including the integrated SPD. 24/7 U.S.-based support."

• AUTOMATIC POWER TRANSFER: Continuously monitors utility voltage and instantly transfers your entire home to standby generator power during an outage, then returns to utility automatically — no manual steps required
• DESIGNED FOR GENERAC STANDBY GENERATORS: Compatible with single-phase Generac Home Standby generators using Evolution or Power Zone 200 controllers, providing whole-home 120/240V backup coverage for circuits including well pumps and dryers
• WHOLE-HOME SURGE PROTECTION BUILT IN: Factory-installed Type 1/Type 2 SPD rated at 50 kA per phase defends appliances and sensitive electronics from transient voltage spikes and utility surges — no separate surge device needed
• SERVICE ENTRANCE RATED WITH OPEN-TRANSITION DESIGN: Rated for 100A at 120/240V single phase, the open-transition mechanism fully disconnects utility power before connecting the generator, physically preventing dangerous backfeed into the grid
• ALL-WEATHER NEMA 3R ALUMINUM ENCLOSURE: Corrosion-resistant aluminum housing with electrostatically applied baked powder paint withstands rain, snow, ice, and debris, giving you flexible indoor or outdoor installation options
• SMART LOAD MANAGEMENT READY: Supports Generac Smart Management Modules to monitor and prioritize loads, helping your generator avoid overload by shedding lower-priority circuits before your generator reaches its capacity limit
• COMPATIBLE WITH GFCI AND AFCI BREAKERS: Multi-listed for use with standard, tandem, GFCI, and AFCI breakers from Siemens, Eaton, Square D, and Murray up to 50A per circuit, reducing costly breaker replacement during installation
• 5-YEAR WARRANTY AND PROFESSIONAL-GRADE CONSTRUCTION: Backed by a 5-year limited warranty including the SPD; service entrance installation requires a licensed electrician and is supported by 24/7 customer service based in Wisconsin