PowerMax PM3-55LK RV Converter Charger 55A Deck-Mount, Regulated 12V & Lithium-Ready

The PowerMax PM3-55LK is a deck-mount RV converter charger that provides regulated 12V power and up to 60A DC output while supporting adjustable lithium charging profiles.

The PM3-55LK blends a standalone converter format with multi-stage charging logic, designed to supply continuous 12V DC to coach systems and recharge battery banks. Its deck-mount layout lets you position the unit close to the battery compartment or electrical distribution for neater wiring and reduced voltage drop. Built-in safeguards such as current limiting, reverse-polarity protection and thermal shutdown help protect the converter and connected batteries under real-world RV conditions.

How does the PM3-55LK supply power to my RV when shore power is connected?

When you plug into shore power, the converter transforms AC input to a regulated 12V DC output to run appliances and top up batteries. It maintains steady voltage to vehicle loads while diverting charging current to the battery bank as needed.

• Up to 60A DC output for coach electrical systems
• Regulated 12V delivers stable voltage to lights, pumps, and control modules
• Standalone deck-mount lets you install near batteries or the distribution panel

Can I use this unit with lithium battery systems?

The PM3-55LK includes adjustable output settings that make it compatible with properly configured lithium batteries. It’s not a dedicated lithium battery management system, so configure the charger outputs to match your battery manufacturer’s recommended charge profile and disconnect requirements.

• Adjustable charging output to align with lithium charge parameters
• Works with lithium banks when set up with correct voltage and termination points
• Combine with battery management or BMS for optimal lithium safety and longevity

What protections are built into the converter to keep my system safe?

PowerMax built the PM3-55LK with several safety features to prevent damage from common electrical faults. These safeguards reduce risk to both the converter and the batteries, and help maintain reliable operation over time.

• Current limiting to prevent overloads and reduce stress on wiring
• Reverse-polarity protection to guard against incorrect battery connections
• Thermal protection that reduces output or shuts down under excessive heat

How does the deck-mount design benefit installation and maintenance?

Deck-mounting means the converter bolts directly to a flat surface inside the coach, putting it close to the battery bank and distribution panel. This shortens cable runs, simplifies cable routing, and keeps the unit accessible for monitoring and service.

• Mount near battery bank to minimize voltage drop and cable length
• Flat, compact footprint fits inside cabinets or service bays
• Accessible terminals and mounting points for straightforward wiring and inspection

Who this is for: The PowerMax PM3-55LK suits RV owners, vanlifers, and fleet operators who need reliable, regulated 12V power and flexible charging for mixed battery installations. It’s a practical choice for setups requiring a standalone converter that can be mounted close to the battery bank and adjusted to support compatible lithium batteries when used with proper BMS and manufacturer-recommended settings.