Powermax PMTS-50: The High-Capacity Standard for 50A RV & Off-Grid Systems

The Powermax PMTS-50 is a heavy-duty 50 Amp automatic transfer switch (ATS) engineered for large RVs, motorhomes, and off-grid solar cabins utilizing 120/240V split-phase power. It provides the ultimate convenience by automatically managing the transition between shore power and your backup generator. Capable of handling generators up to 12kW, the PMTS-50 ensures your high-demand appliances—like dual AC units and electric water heaters—remain powered without the need for manual cord swapping.

To protect your expensive electrical equipment, the PMTS-50 includes an integrated 20-30 second time delay for generator startup. This allows the generator's engine and voltage to reach a stable operating state before the electrical load is applied, preventing damaging surges or frequency dips. This ETL Listed unit is built with safety as a priority, featuring a durable, high-impact enclosure and internal mechanical interlocks to prevent power backfeed.

High-Capacity Performance Features:

• Automatic Source Prioritization: Intelligently senses available power. It defaults to shore power (Input 1) and automatically shifts to your generator (Input 2) once it detects a stable voltage.
• Stabilization Delay Circuit: Protects AC compressors and sensitive electronics by waiting 20-30 seconds for the generator to "warm up" before transferring the load.
• Robust Electrical Construction: Features high-quality terminal blocks that accept 6-14 AWG wire, ensuring a secure, low-resistance connection for sustained high-current use.
• Versatile Mounting: The compact, durable plastic enclosure can be mounted in any orientation, making it easy to install in tight storage bays or electrical cabinets.
• Timer Bypass Toggle: Includes a manual override switch to bypass the time delay for specific testing or inverter-based applications where immediate transfer is desired.

Technical Specifications (Model PMTS-50):