Collection: Battery Chargers

Choosing the right onboard charger comes down to four things: system voltage, bank count, charge rate, and input power. The 12V and 24V options here cover both common setups, and bank count runs from single-bank maintainers like the Guest 1.5A and ProMariner ProSport up to four-bank units like the Dual Pro Sportsman HF, so you can match the charger to your actual battery configuration rather than compromising. Amperage matters too: a 1.5A maintainer is suited to keeping a seldom-used boat topped off, while the higher-output Dolphin Charger Pro Series units at 60A, 90A, and 100A are built for vessels with serious house bank demands or fast turnaround requirements at a slip.

Input voltage is worth checking before you buy. Several Dolphin Charger models accept both 110V and 220VAC at 50/60Hz, which is useful if the boat travels internationally or your marina runs European shore power. Mastervolt's ChargeMaster line is a strong pick for sailors and powerboaters who want precise multi-stage charging with minimal heat output. Dual Pro's high-frequency technology reduces weight compared to older transformer-based designs, which matters on smaller hulls. All products here are sold as genuine goods through an authorized dealer, so manufacturer warranty coverage applies as purchased.