An AC battery charger converts shore power (alternating current) into a safe, controlled direct current (DC) to charge your boat's batteries. These chargers are essential when your boat is docked for extended periods or when you have access to marina power stations.

• Designed for boats that spend time docked or in storage.
• Provides a steady, regulated charge to keep batteries topped up. 
• Ideal for maintaining battery health during off-seasons.
• Can power onboard appliances when connected to shore power.

Best Use Case: If your boat is frequently at a marina and has access to shore power, an AC charger ensures your batteries remain charged and ready for your next adventure. 

A DC-to-DC charger is designed to efficiently charge one battery bank using power from another, typically from your alternator. These chargers regulate voltage and prevent overcharging, making them ideal for boats with multiple battery banks - such as starter and house batteries.

• Ideal for boats with dual-battery setups.
• Helps prevent alternator overload by managing charge distribution.
• Maintains optimal charging voltage, improving battery lifespan.
• Great for long trips where alternator power is available but needs controlled distribution.

Best Use Case: If your boat has an alternator and multiple batteries (such as a fishing boat with trolling motor batteries), a DC charger ensures efficient charging while underway.