Abstract: A method of controlling a battery charger to charge a battery includes setting a fan speed threshold for a fan within a battery charger, wherein the fan speed threshold is less than a maximum fan speed of the fan. The operating speed of the fan in the battery charger is controlled so as not to exceed the fan speed threshold and the battery charger is controlled to deliver a first charge current such that a temperature of the battery charger does not exceed a first temperature threshold while the operating speed of the fan remains at or below the fan speed threshold. A user input is received to engage a fast charge mode and, in response thereto, the operating speed of the fan is increased above the fan speed threshold so as not to exceed the maximum fan speed.

Abstract: A waterproof marine power supply system is provided. The system includes an enclosure defining an interior region and including an upper wall and a lower wall, a first peripheral wall and a second peripheral wall, and a convection passage wall extending within the interior region and separating a convection passage from a component space, where the convection passage extends from a first end to a second end of the enclosure. The component space houses power supply components. The system further includes a first end cap, a second end cap, and a fan coupled to either the first end cap or the second end cap and configured to force a flow of air through the convection passage. The first end cap and the second end cap are coupled to the enclosure such that the component space is sealed against water intrusion and the convection passage is not sealed against water intrusion.

Abstract: A marine battery charger system configured to be installed on a marine vessel to charge a marine battery includes a housing, a charging circuit in the housing configured to receive AC power and to output a charge current to the marine battery, and a cord. The cord has a plug end configured to engage an AC power outlet and is configured to transmit the AC power from the AC power outlet to the charging circuit. A controller is configured to control a charging operation mode of the charging circuit and a status indicator is located at the plug end of the cord and configured to be controlled by the controller to indicate the charging operation mode of the charging circuit.