Newmar PT-MCU Monitor Control Unit

Enhance your battery charger's performance with the PT-MCU Monitor Control Unit from Newmar's Phase Three lineup. This rugged companion takes your power management to the next level, especially in demanding environments like marine vessels, RVs, or off-grid solar setups. Imagine spotting a low voltage issue across three separate battery banks before it strands you— that's the kind of proactive oversight this unit delivers.

Precision Monitoring for Multiple Battery Banks

At the heart of the PT-MCU is a digital voltmeter that reads voltages from three battery banks down to a precise 1/10th of a volt. Switch effortlessly between banks using the sense selector, keeping tabs on house, engine, and auxiliary batteries without guesswork. Adjustable high and low voltage alarms alert you instantly to potential problems, preventing deep discharges or overcharges that could shorten battery life.

Fine-Tune Your Charger's Output

One standout feature is the output float voltage adjustment potentiometer. Dial in custom settings from -4% to +5% for optimal charging tailored to your battery chemistry—whether flooded lead-acid, AGM, or gel. This flexibility ensures longer battery health and efficiency, adapting to real-world variables like temperature swings or varying loads.

Robust AC Protection and Status Indicators

Safety first: A 30A double-pole AC circuit breaker safeguards against overcurrent while doubling as a manual disconnect for maintenance. An illuminated AC power ON indicator gives you at-a-glance confirmation that everything's powered up and running smoothly. Waterproof wire cord grips seal out moisture, making it ideal for wet or dusty conditions.

Seamless Integration and Durability

A generous 10-foot wiring harness simplifies connections to your PT Series charger, minimizing clutter during install. Heavy-duty mounting flanges on top and bottom secure it firmly in tight spaces. The anodized aluminum case resists corrosion and stands up to vibrations, ensuring years of reliable service in mobile applications.

Perfect Match for PT Series Chargers

Engineered specifically for Newmar's PT lineup, it pairs flawlessly with models handling everything from 14A to high-output 24V systems. Whether you're upgrading a compact PT-14W or powering through with a PT-24-95U, this unit unlocks advanced monitoring without replacing your existing charger.

Installation Insights for Peak Performance

Getting started is straightforward. Mount the unit near your charger, route the harness for AC input and DC sensing leads to each battery bank—positive and negative for accuracy. Calibrate the float voltage pot under load to match your batteries' specs, and test alarms by simulating voltage dips. Pro tip: Position sense wires away from heavy current paths to avoid noise-induced readings. Users often report noticeable improvements in battery maintenance after setup, with fewer surprise failures during long trips.

Real-World Applications and User Benefits

In marine setups, it prevents alternator overloads by monitoring engine start batteries. RV enthusiasts love catching inverter drain issues early on house banks. Off-grid pros fine-tune float voltages for solar arrays, squeezing more cycles from deep-cycle batteries. The result? Reduced downtime, extended equipment life, and confidence in your electrical system—no matter where adventure takes you.