Dual Pro RS3 RealPRO Series 3-Bank Waterproof Battery Charger

Whether you're running a bass boat with a trolling motor and a cranking battery, maintaining a pontoon, or keeping an ATV ready for the weekend, the Dual Pro RS3 RealPRO Series gives you a smarter way to charge. With three fully independent 6-amp banks delivering 18 amps of total output, you can charge up to three separate 12V batteries at the same time — each one getting its own dedicated charging circuit.

That independence matters more than it might seem. Because each bank operates on its own microprocessor, the RS3 can charge batteries of different ages, sizes, and states of charge simultaneously without any one battery affecting another. Plug in a nearly dead trolling motor battery alongside a nearly full starting battery, and the charger handles each one appropriately — no guessing, no risk of under- or over-charging.

One Charger, Multiple System Configurations

The RS3 is built around three 12V outputs, which gives it surprising flexibility depending on how your system is set up:

• Three separate 12V batteries charged independently
• A 24V trolling motor system (two batteries in series) plus a separate 12V starting battery
• A full 36V trolling motor system using three 12V batteries in series

It's worth noting that the RS3 works with individual 12V batteries only — it is not designed for use with a single 24V or 36V battery.

Works with the Batteries You Already Have

The RS3 is compatible with wet cell (flooded), AGM, and most lithium batteries — and there's no manual switching required between battery types. For lithium batteries, the charger includes an automatic wake-up function to safely bring deeply discharged packs back online. And thanks to low 2-volt detection, the RS3 can recognize and safely begin charging a battery that has dropped as low as 2 volts — something that would stop many basic chargers in their tracks.

Note: Always confirm lithium battery compatibility with PRO Charging Systems (PCS) before use.

Waterproof and Built for Harsh Conditions

The RS3 is fully waterproof and designed for use in both fresh and salt water environments. The construction is rugged, vibration-resistant, and built to live on a boat permanently — not just sit on a shelf in your garage. Mounting flanges are included for a secure, permanent installation wherever you need it.

Automatic Charging — Set It and Forget It

Once plugged in, the RS3 takes over completely. Its multi-stage charging process brings each battery up to a full charge, then automatically shifts into a float maintenance mode to keep batteries topped off without overcharging them. LED indicators on the unit show the charge status of each bank at a glance, so you always know where things stand.

The charger is also reverse polarity protected, meaning a backwards connection won't damage the unit or your batteries — a small but meaningful safety net during installation.

Safety Certifications You Can Rely On

The RS3 meets the standards that matter most for marine use. It carries ISO 8846 Marine certification and is ignition protected in compliance with US Coast Guard regulations (33 CFR 183.410), meaning it's safe to use in enclosed engine compartments where fuel vapors may be present. It also meets FCC Part 15 Class A and B requirements for interference compliance.

Backed by a three-year manufacturer's warranty, the Dual Pro RS3 RealPRO Series is a dependable, no-fuss charging solution for anyone who wants to plug in, walk away, and come back to fully charged batteries.