Features and Benefits: A 2-bank, 8 Amp (4 Amps per bank) on-board battery charger Charges starter and deep-cycle batteries up to 100Ah 100% completely sealed and waterproof design rated at IP68 Spark-proof technology and reverse polarity protection Provides full-charge output even with low-line voltages The GENM2 is an On-Board Battery Charger for charging and maintaining a two 12-volt Marine, Starter or Deep-Cycle battery. Its rugged waterproof, shock- and vibration-resistant design can be mounted directly onto a variety of applications, including a boat, trolling motor or generator, as well as a full range of electric vehicles and industrial equipment. It monitors battery activity for safe, fast and efficient charging of Wet, Gel, AGM and Maintenance Free batteries without the worry of overcharging. And it's one of the most advanced charging systems designed for improved battery performance and longevity.