Generac Nexus Smart Switch 400 Amp ATS 120/240 Single Phase NEMA 3R Cabinet
Generac Power Systems

Generac Nexus Smart Switch 400 Amp Automatic Transfer Switch (ATS) 120/240 Single Phase NEMA 3R Cabinet with digital Load Management Technology.

Generac Nexus Smart Switches are designed to operate with the Nexus controller used on air-cooled and liquid-cooled QT series.  The Smart Switch will operate only with the Nexus or Generac R200 controller. Efficiently manages two large loads without additional components.

• Standard load management of  two air conditioners.
• Cover more circuits with a smaller generator.
• Add additional individual DLM modules and manage up to four more large loads.
• Nema 3R aluminum enclosure.
• CSA Compliant

How It Works:
1. By monitoring generator engine performance, the switch is able to identify when the generator approaches overload. At the appropriate time, the switch disconnects two air conditioners, typically the highest electrical load in the house.

2. After a 5-minute delay to allow for compressor bleed out, the switch brings the AC units back online one after the other with a 30-second delay in between. This is a standard capability in all Generac Smart Switches and does not require any additional components, unlike competitive transfer switches.

3. In addition, up to four other large 240V loads can be managed when the Smart Switch is used in conjunction with individual DLM modules.

• DLM modules are 50 Amps each and are housed in a NEMA 3R enclosure, giving the installer the option to install them either at the electrical panel or anywhere in-line indoors or outdoors between the electrical panel and the appliance.
• After the four loads are shed, they are brought back individually to assure DLM Module generator capability and eliminate the potential of overload.

Ships Free with a Generator or $48.00 S&H Fee Will Be Added


Generac Nexus Smart Switch 400 Amp ATS 120/240 Single Phase NEMA 3R Cabinet

Generac Power Systems Model #RTSX400A3
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Country Living
Comment by Jim C. on 9th Nov 2014

My Mom and Dad are both in their 80's and live in the country. With the installation of the 6551 I can rest assured that they will never be without power, heat, ac and water. this is a great unit and worked perfectly upon startup. Should have installed this a lot sooner for them.

By the way, my son-in-law also has one for his home. I live in a motorhome or I would have one also.

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