Generac 200 Amp Next Gen Automatic Generator Transfer Switch, SE Rated | Non Integrated Surge Protection Device, Service Entrance Rated, Hardened Fuse Control Module

The Generac G0099350 is a 100-amp non-service entrance rated automatic transfer switch designed exclusively for use with Generac standby generators equipped with an Evolution™ or Power Zone™ 200 controller. Unlike portable generator transfer switch kits that require a power inlet box and connecting cord, this unit integrates directly with a Generac standby system — the generator controller handles all sensing, timing, and transfer commands automatically the moment utility power drops or degrades. At 100 amps on a 120/240V single-phase system, this switch is sized for whole-home transfer rather than individual circuit selection. It supports simultaneous 120V and 240V loads including well pumps, central air conditioning, sump pumps, refrigerators, and electric ranges. Buyers needing to back up only a handful of circuits may want to evaluate a circuit-based manual transfer switch instead; buyers with a whole-home Generac standby system will find this the correct solution. The hardened control module is built to withstand brownouts and utility power disturbances that can cause false transfers or controller damage in lesser units. Integrated surge protection is included and covered under the 5-year warranty. The aluminum NEMA 3R enclosure resists corrosion and carries an electrostatically applied, baked powder-coat finish rated for rain, snow, ice, and debris — approved for both indoor and outdoor wall mounting. The mechanical interlock inside the switch physically prevents utility and generator power from being connected simultaneously, eliminating any possibility of backfeeding live voltage onto the utility grid — a code requirement under NEC Article 702 for all standby power installations. Installation involves line-voltage work at the main electrical panel and must be performed by a licensed electrician. A fast-mount enclosure hanging system on select models reduces professional installation time by 30 or more minutes. The switch is backed by a 5-year limited warranty and supported by Generac's 24/7/365 customer service team in Wisconsin.

• WHOLE-HOME AUTOMATIC BACKUP POWER: Transfers your entire home's electrical load to a compatible Generac standby generator automatically during an outage, with no manual switching required
• HARDENED CONTROL WITH BROWNOUT PROTECTION: The control module is engineered to withstand harmful utility disturbances including brownouts and surges, ensuring reliable automatic transfer performance every time
• 200-AMP CAPACITY FOR 120V AND 240V LOADS: Rated at 200A on a 120/240V single-phase system, this switch supports whole-home loads including well pumps, HVAC systems, and large appliances simultaneously
• NEMA 3R ENCLOSURE FOR INDOOR OR OUTDOOR INSTALLATION: The aluminum, corrosion-resistant enclosure with powder-coat finish deflects rain, snow, ice, and debris, giving you full flexibility in placement
• BACKFEED PREVENTION BUILT INTO THE MECHANISM: The switch is mechanically interlocked so utility and generator power sources can never be connected at the same time, meeting NEC standby system requirements
• COMPATIBLE WITH EVOLUTION AND POWER ZONE 200 CONTROLLERS: Designed for use with Generac standby generators equipped with Evolution or Power Zone 200 controls for fully automated sensing and transfer
• FASTER INSTALLATION WITH FAST-MOUNT HANGING SYSTEM: An innovative enclosure fast-mount system on select models can save installers 30 or more minutes of setup time, helping reduce overall installation costs
• 5-YEAR LIMITED WARRANTY WITH 24/7 SUPPORT: Backed by a 5-year limited warranty covering the integrated surge protection device, with round-the-clock customer support from Generac's Wisconsin-based team