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Generac Smart Switch™ 300-Amp Automatic Transfer Switch + AC Shedding (Service Disconnect)

Generac Guardian Electric Generators and Accessories
Model: RTSY300A3
(Based on expert analysis, manufacturer ratings and customer reviews)
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Service Disconnect
Amp Rating
300 @ 240 Volts (Single Phase)
Load Mgmt.
300-Amp Generac Smart Automatic Transfer Switch
For Generac Evolution™ & Generac Nexus™ & R200 Controllers
Leverages digital power management (PMM) technology
Ability to manage 2 A/C units with no additional hardware

Intelligently Manage 4 More Loads w/ Additional PMM Kit/Modules
PMM Starter Kit (6199) & PMM Module (6186) (Both Sold Separately)

Service Entrance Rated
Installs between main meter and service panel
Contains load side and line side disconnecting breaker

NEMA 3R Indoor/Outdoor Rated
Steel, wall mountable weather-proof enclosure
Electrostatically applied and baked powder paint (Gray)

Tech Spec Summary:
Load transition type: Open Transition
Withstand rating: 22,000 Amps
Lug range: #4 or 2-250 MCM

For Use With Generac Generators Only

*Please Note - Switch is Compatible w/ DLM Modules*
Product Specs
120/240 Single-Phase
60 Hertz
Rated Watts
72000 Watts
Rated Amps
300 @ 240 Volts (Single Phase) Amps
Transfer Switch Style
Service Disconnect
ATS Load Prioritizing
ATS Load Shedding
ATS Poles
2 Poles
ATS Service Disconnect
Max Utility Input
300 Amps
Max Generator Input
300 Amps
Maximum Wattage
72000 Watts
UL Listed
Made in USA
140 Pounds
Product Length
48 Inches
Product Width
22 Inches
Product Height
10 Inches
Consumer Warranty
5 Years
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How To Library
  2 Questions
Q: Trying to determine if the lugs on the load side are two each so that they can be paralleled?
by Mike Kimler from Ohio on September 25, 2013

A: Thank you for your interest in Electric Generators Direct!

The Generac Guardian, RTSY300A3 Automatic Transfer Switch is capable of being paralleled, but not in the manner in which you intend.

These switches are designed for parallel operation in applications where there are multiple service panels coming directly off of the utility meter. Each panel would be fed with its own set of utility leads. When using multiple switches, they will be connected via the control wires, and communicate in a parallel method.

It is recommended that this configuration be performed by a qualified Generac installer.

by Mike, Product Expert

Q: I need a 20kW natural gas generator. But they seem to only come with a 200A panel. I believe I need a 300A panel. Is there a big price difference in purchasing a 300A panel with the generator? I didn't see it on your website. Can you tell me the price?

by Peter Kearns from New Jersey on July 13, 2013

A: If you have a specific application that does not meet the prepackaged units you would purchase the items individually instead. The packaged systems are put together by the appropriate manufacturer and cannot be altered.

Briggs does not offer a 300A switch so you would need to go to the larger 400A switch if you intend on powering the entire home and that system is already prepackaged. (Model 40396).

Generac does offer a 300A switch so you would purchase the generator by itself (Model 6250) and the switch separately (Model RTSY300A3). Just add each item to the cart and enter your state and zip for the total.

We do recommend consulting with a certified electrician for proper generator sizing and installation.

by Mike, Product Expert

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Shop for the Generac Smart Switch™ 300-Amp Automatic Transfer Switch + AC Shedding (Service Disconnect) at Electric Generators Direct. Research Generac Guardian 696471614039 automatic transfer switches online. Find Generac Guardian RTSY300A3 automatic transfer switches & Guardian 300 Amp Transfer Swit features and specifications.