Guest On-Board Waterproof Battery Charger | 40A / 12V - 4 Bank (2740A)

The Guest 2740A is a high-performance, fully automated on-board battery charger designed for serious anglers and boaters with multi-battery setups. Delivering a total of 40 Amps across four independent banks (10 Amps per bank), this charger is the ideal solution for 36V trolling motor systems plus a dedicated 12V starting battery, or any configuration of up to four 12V batteries.

Precision Multi-Stage Charging

The 2740A features a 5-stage charging profile (Analyze, Soft Start, Bulk, Absorption, and Maintain) that extends the life of your batteries by ensuring they are never overcharged or undercharged. Each bank is dedicated, meaning the charger can manage different battery types and states of charge simultaneously without interference.

Key Features:

• 4-Bank Dedicated Charging: Provides 10 Amps per bank, allowing for a fast and thorough charge of up to four batteries at once.

• 100% Waterproof & Shockproof: Built with a rugged, epoxy-filled (potted) housing, this charger is rated for the most extreme marine environments—completely protected against salt, moisture, and vibration.

• Universal Battery Compatibility: Specifically designed to work with Flooded (Lead-Acid) and AGM batteries.

• Sense-Send Technology: Intelligently senses the state of each battery and adjusts the output accordingly to provide the most efficient charge.

• Comprehensive Protection: Features built-in safety mechanisms including Reverse Polarity, Over-Voltage, Over-Current, and Over-Temperature protection.

• LED Status Indicators: Easy-to-read LEDs for each bank indicate "Charging," "Conditioning," and "Ready/Maintaining" at a glance.

• Pre-Wired for Easy Install: Comes with 6-foot AC and DC cables, complete with ring terminals and integrated fuses for a safe, plug-and-play setup.

Technical Specifications:

• Model Number: 2740A

• Total Output: 40 Amps

• Output Per Bank: 10 Amps

• Banks: 4

• System Voltage: 12V DC per bank (Total 12/24/36/48V configurations)

• Input Voltage: 120V AC (50/60Hz)

• Dimensions: 13.0" x 8.7" x 3.6"

• Weight: 17.5 lbs

Why Choose the Guest 2740A?

For boats running a 36V trolling motor system (3 batteries) plus a house/starting battery, the 2740A is the perfect "all-in-one" solution. Instead of running multiple chargers, this single unit manages the entire electrical system. Its 10-amp-per-bank speed is twice as fast as entry-level 5-amp chargers, getting you back on the water much sooner.

Installation Note:

To ensure maximum longevity, mount the charger in a well-ventilated area. While the unit is 100% waterproof, providing airflow helps the cooling fins dissipate heat during the "Bulk" charging phase. Ensure the ring terminals are connected directly to the battery posts for the most accurate voltage sensing.