Generac RXGW20SHA3: Specs & Datasheet
MPN: RXGW20SHA3The Generac RXGW20SHA3 is a 200 A service-entrance-rated automatic transfer switch with an integrated load center — the standard whole-home ATS paired with Generac Guardian-series standby generators. Below are the published specifications for this exact model number.
Because the RXGW20SHA3 is service entrance rated, it installs between the utility meter and the home's circuits as the main disconnecting means — so one enclosure handles utility switching, generator switching, and branch-circuit distribution. When utility power fails, the switch signals the generator to start and transfers the load in under ten seconds; when utility power stabilizes, it transfers back and cool-down-shuts the generator down. The Type 3R enclosure permits outdoor mounting next to the meter base, which keeps generator feeder runs short in typical residential layouts.
Specifications
| Model number | RXGW20SHA3 |
|---|---|
| Rated amperage | 200 A |
| Voltage rating | 120/240V |
| Phase | Single phase |
| Service rating | Service Entrance Rated |
| Enclosure | Type 3R |
| Dimensions | 36 × 24 × 10 in |
| Weight | 100 lbs |
| Transfer time | Less than 10 seconds |
| Load center | Integrated |
| Certification | UL Listed |
| Warranty | 5 Years Limited |
Compatible With / Used In
- Generac Guardian-series air-cooled standby generators — the matched 200 A service-entrance ATS for whole-home backup
- Whole-home backup installations — integrated load center manages the full panel
- Outdoor or indoor mounting — Type 3R enclosure
Datasheet Availability
Generac publishes ATS specification sheets at generac.com/specs. For the RXGW20SHA3 sheet specifically, call (502) 790-0600 and we will include it with your quote.
View the RXGW20SHA3 product page →
Frequently Asked Questions
What is the Generac RXGW20SHA3?
A 200 A service-entrance-rated automatic transfer switch with integrated load center, 120/240V single phase, Type 3R enclosure, UL listed, transferring in under 10 seconds.
What generators work with the RXGW20SHA3?
It is designed to pair with Generac Guardian-series air-cooled standby generators for whole-home backup.
How fast does the RXGW20SHA3 transfer to generator power?
Less than 10 seconds, per the published specification.
Is the Generac RXGW20SHA3 in stock?
Yes — in stock at Portlandia Electric Supply with nationwide shipping. Call (502) 790-0600 for pricing.
Specifications sourced from the manufacturer listing data maintained by Portlandia Electric Supply. Where a value is not published, it is marked as such — we do not estimate specifications. Questions: call (502) 790-0600. Portlandia Electric Supply, Louisville, KY — 12+ US distribution hubs.