Power and charging system for a marine vessel

An onboard battery charger configured to be installed on a marine vessel to receive an AC power input from a shore power source and to charge at least one battery on the marine vessel, the onboard battery charger comprising:

• a rectifier configured to receive an AC power input from a shore power source and provide a DC charging output to charge the battery;
• an active phase circuit configured to provide a regulated AC output to power an onboard AC load on the marine vessel, wherein the active phase circuit is connected to the output of the rectifier and includes a return connection configured to form a return path for electric current from the onboard AC load;
• wherein the rectifier, the return connection, and the active phase circuit are configured to split the AC power input from the shore power source into the DC charging output to charge the battery and the regulated AC output to power the onboard AC load;
• a charger housing configured to mount to the marine vessel, the charger housing comprising an input port configured to receive the AC power input, a DC output port configured to provide the DC charging output to the battery, and an AC output port configured to provide the regulated AC output to power the onboard AC load;
• and
• wherein the rectifier and the active phase circuit are within the charger housing.