A fast charging station for a marine vessel battery on a marine vessel is provided. The fast charging station includes a dock battery, a charger that is operatively coupled to a power source and the dock battery, and an enclosure located on a dock structure in a body of water. The enclosure is configured to encapsulate the dock battery and the charger. The charger is configured to charge the dock battery using the power source when the marine vessel is not docked to the dock structure. The charger is further configured to charge the marine vessel battery using the power source and the dock battery when the marine vessel is docked to the dock structure.