Designed to live aboard a boat, this onboard charger delivers a steady 12V/5A output through a single charging bank, with three modes, LFP, NCM, and lead-acid, so it matches whatever battery chemistry is on board. The sealed aluminum alloy housing carries an IP68 rating, standing up to water, dust, and salt spray in a marine environment, and it keeps working across a wide -4°F to 185°F operating range. It can start charging from a fully discharged 0V state, recovering batteries that would otherwise be written off, and its multi-stage charging management adjusts power automatically as the battery's condition changes. Built-in monitoring watches for overvoltage, short circuits, overcurrent, sparking, overheating, and reverse connections. At 6.5 x 3.54 x 2.1 in and 2.91 lbs, with 5.74 ft DC and AC cables and a 6.02 in mounting hole spacing, it mounts easily near the helm or battery compartment of a boat, yacht, RV, or trailer.