Guest On-Board Waterproof Battery Charger | 5A / 12V - 1 Bank (2708A)

The Guest 2708A is a compact, fully automated single-bank on-board battery charger designed for boaters who need a reliable, "set-it-and-forget-it" solution for a single 12V battery. Delivering 5 Amps of charging power, this ChargePRO series unit is the perfect choice for maintaining a dedicated starting battery or charging a small deep-cycle battery on personal watercraft, jon boats, or small runabouts.

Smart Charging in a Small Package

Despite its entry-level size, the 2708A uses the same sophisticated 5-stage charging algorithm (Analyze, Soft Start, Bulk, Absorption, and Maintain) as Guest's larger professional models. This process ensures that your battery is not only charged to 100% but is also conditioned to prevent sulfation, significantly extending the life of your marine battery.

Key Features:

• Single-Bank Charging: Provides a dedicated 5 Amps to a single 12V battery.

• 100% Waterproof (IP67): The unit is completely sealed in a rugged, shockproof, and epoxy-potted housing. It is designed to be permanently mounted in the harshest marine environments, including wet bilges and open consoles.

• Universal Compatibility: Optimized for all 12V Flooded (Lead-Acid) and AGM batteries.

• Auto-Maintain Technology: Once the battery is fully charged, the unit enters an energy-saving monitor mode, keeping the battery topped off during long periods of storage without overcharging.

• Safety & Protection: Features built-in protection against reverse polarity, over-current, over-voltage, and over-temperature. It is also ignition-protected for safe installation near gasoline engines.

• Vibrant LED Indicators: A simple LED interface provides immediate feedback on the charging status (Charging, Conditioning, Ready/Maintaining) and fault detection.

• Compact Footprint: One of the smallest on-board chargers available, making it ideal for PWC (Jet Ski) engine compartments or small storage boxes.

Technical Specifications:

• Model Number: 2708A

• Total Output: 5 Amps

• Banks: 1

• DC System Voltage: 12V

• Input Voltage: 90–135V AC (50/60Hz)

• Dimensions: 5.0" x 6.4" x 2.4"

• Weight: 3.5 lbs

• Cabling: Pre-wired 6' AC and DC cables with ring terminals and an in-line fuse.

Why Choose the Guest 2708A?

The 2708A is the ideal solution for boaters who want to avoid the hassle of portable "clip-on" chargers. Because it is permanently mounted and wired, you simply plug in an extension cord when you return to the dock or garage. It is specifically recommended for Group 24 batteries or for maintaining larger batteries that are not deeply discharged during use.

Pro Tip for Installation:

If you are installing this on a Personal Watercraft (PWC), ensure the charger is mounted away from the exhaust manifold to avoid excessive heat. For the neatest installation, use the Guest AC Plug Holder to mount the power plug on the interior of a storage compartment so it doesn't bounce around during high-speed maneuvers.