PowerMax PMTS-30 30A Automatic RV Transfer Switch 120V — 2-Input Auto-Sensing, Break-Before-Make

If you operate an RV, mobile workshop, or small backup system, the PMTS-30 removes the hassle of manual cord changes when your available power source shifts. Designed to accept two independent 120V inputs — for example shore power and a portable generator — this compact unit monitors voltage and switches automatically to the preferred source so your appliances and outlets remain powered without interruption.

How does the PMTS-30 decide which power source to use?

The unit constantly monitors both 120V inputs and transfers to the source that meets preset voltage and frequency thresholds. It prevents unsafe backfeeding between sources by isolating the input not in use and only connects the selected source to the load.

• Automatic sensing of voltage and frequency to select the best input
• Break-before-make switching to avoid connecting both sources together
• Rapid, reliable transfer to minimize interruptions to appliances

What installation and wiring considerations should I know?

PMTS-30 requires correct wiring and grounding per applicable electrical codes and RV standards. A licensed electrician or certified RV technician should perform installation to ensure safe connections, correct breaker sizing, and proper enclosure mounting.

• Mount in a dry, accessible location with adequate ventilation
• Use appropriately rated conductors and a 30A breaker for the load side
• Follow local code and manufacturer wiring diagrams for input/output terminations

Which devices and setups is this transfer switch compatible with?

The PMTS-30 is built for single-circuit, 120V systems up to 30 amps—typical for RV distribution panels, air conditioners, microwaves, and outlet circuits. It pairs with shore pedestal connections and portable or onboard generators that supply a standard 120V output.

• Works with shore power pedestals and portable generators
• Suitable for motors, HVAC, kitchen appliances, and general outlets
• Not intended for multi-phase or higher-voltage distribution

How does this unit improve everyday RV power management?

By automating source selection, the PMTS-30 reduces the need to physically swap cords or manually flip breakers during transitions between shore and generator power. That lowers wear on cords and connectors and keeps critical loads powered without user intervention.

• Saves time and reduces manual switching errors
• Protects connected equipment from improper source connections
• Provides consistent, predictable power handoff in camp or travel situations

The PMTS-30 is constructed with a rugged enclosure and components intended for repeated cycling and long-term service life, making it a practical addition to RV electrical systems and portable backup setups. It simplifies on-the-go power changes while isolating sources to protect equipment and prevent backfeeding.

Who is this for: The PowerMax PMTS-30 is aimed at RV owners, mobile contractors, and anyone using a single 120V circuit with shore and generator options who wants automated, code-compliant switching. If you need a compact, reliable device to manage two 120V sources for a 30A circuit and prefer professional installation, this transfer switch fits those needs without adding complex controls.