Guest 12V 30A 3-Bank On-Board Charger

Description

The Guest 30A On-Board Battery Charger is designed for three-bank 12V marine battery systems that need independent charging control, clear status information, and protection from the wet conditions found aboard boats. Guest’s latest on-board platform uses high-frequency digital charging technology, with dedicated charging, sensing, and control for each connected bank rather than treating the batteries as one combined load.

A fully automatic five-stage charging program manages recovery and maintenance without requiring the user to change modes manually. The expanded LED display shows the charging status of each bank, while built-in wiring and battery fault detection helps identify common connection or battery problems during setup and operation. Auto-maintain Energy Saver logic reduces unnecessary charging activity once the batteries have recovered, making the charger suitable for boats that remain connected to shore power between trips.

The charger is fully sealed for freshwater and saltwater use and is built to resist shock and vibration. It arrives pre-wired to simplify installation and supports 12V flooded and AGM lead-acid batteries. Integrated protection covers reverse polarity, over-current, over-voltage, excessive temperature, and ignition hazards, while inline fuses provide additional DC wire protection. Guest backs the charger with a two-year warranty. Take a look through our on-board battery chargers.