Ctek M 300 Marine

The M300 is our recommended charger for boats with large battery banks. The charger features a four-meter long secondary cable and a temperature sensor for temperature-independent optimal charging, providing additional flexibility for permanent installations. The M300 is a fully automatic 8-stage charger with a charging current of 25 A; it is ideal for batteries ranging from 40 to 500 Ah.

The M300 analyzes whether the battery can receive and hold the charge; it eliminates harmful lead sulfate crystals, delivers effective charging, and automatically switches to a safe maintenance charge once the charging process is complete.

The practical Recond mode reconditions the battery after deep discharge cycles, which can occur after a long day at sea. If you want to stay on board overnight, you can set the device to night mode; it will then charge particularly quietly.

With an IP44 protection rating, the M300 is suitable for outdoor use. It does not generate harmful galvanic currents, produces no voltages that could damage onboard electronics, and is designed for safe charging: spark-proof, reverse-polarity, and short-circuit protected.