Parallax | 50 Amp Transfer Switch | ATS501 | 120VAC / 240VAC | 50 Amps | Screw Terminals

Switch power sources seamlessly with the Parallax ATS501 50 Amp Automatic Transfer Switch, a dependable 120/240V solution built to handle the rigorous demands of RV, marine, and off-grid electrical setups. The ATS501 automatically routes power between your active sources — typically shore power and generator — without any manual intervention, so your appliances and onboard systems keep running without missing a beat.

Reliable, Automatic Power Management

Whether you're upgrading your motorhome, fifth wheel, trailer, or tiny home, the ATS501 handles the transfer for you. It quickly and safely switches between generator and shore power as needed, automatically prioritizing the most stable source. No more fumbling with cords, breakers, or manual switches when you fire up the generator or pull into a campground.

Built for Larger Rigs and Bigger Loads

With a hefty 50 amp capacity and dual 120/240V split-phase operation, the ATS501 is built for full-time RVers, larger rigs running multiple appliances, and off-grid systems with serious electrical demands. It's the kind of foundational equipment that should "just work" — and the ATS501 is engineered to do exactly that.

Safety-Certified, Built to Last

Constructed from UL Type 1-rated 16-gauge powder-coated steel, the enclosure stands up to rugged conditions and resists long-term wear. The unit is ETL Listed and conforms to UL Std. 1008 and CSA C22.2 #178.AEI, the safety standards you want behind a switch handling 50 amps in your rig.

Key Features

• Automatic transfer switching between shore power and generator
• 50 amp capacity for larger RVs and full-time setups
• Dual voltage operation — 120V and 240V split-phase
• UL Type 1 / 16-gauge powder-coated steel enclosure
• ETL Listed — UL Std. 1008 & CSA C22.2 #178.AEI compliant
• Compact, easy-to-install design
• Ideal for RVs, boats, cabins, and off-grid power systems

Specifications

• Brand / Series: Parallax ATS
• Model: ATS501
• Amperage: 50 A
• Voltage: 120 / 240V AC
• Switch Type: Automatic Transfer Switch (ATS)
• Enclosure: UL Type 1, 16 GA powder-coated steel
• Listing: ETL Listed
• Compliance: UL Std. 1008 / CSA C22.2 #178.AEI