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Battery Charger for Smaller Boats

Keep your batteries in tip-top shape with this combined unit.

BatteryLink

Blue Sea Systems BatteryLink

There's often little room for electrical equipment on a small boat, so incorporating two functions into one piece of equipment to save space can be helpful. Blue Sea Systems BatteryLink is a compact, waterproof unit, suitable for flooded and AGM (absorbed glass matt) batteries that could be the perfect solution.

Measuring slightly less than 7 inches long by 5 inches wide and 2 inches thick, the unit incorporates an internal 65 amp automatic charging relay allowing two separate batteries to be charged simultaneously. It works by connecting both batteries together when a DC charge more than 13 volts from the engine alternator is detected; yet isolating them from one another when no charging voltage is present, or a load on either battery causes its voltage to drop below 12.75 volts.

If that's not impressive enough, the BatteryLink is also a genuine three-stage marine battery charger. Blue Sea says battery banks with total capacity between 60 and 120 amps will remain correctly charged when the unit is plugged into shore power. A remote monitor is included that can be mounted in the cockpit or some other suitable location. MSRP is $200. BlueSea.com

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Author

Mark Corke

Contributing Editor, BoatUS Magazine

A marine surveyor and holder of RYA Yachtmaster Ocean certification, BoatUS Magazine contributing editor Mark Corke is one of our DIY gurus, creating easy-to-follow how-to articles and videos. Mark has built five boats himself (both power and sail), has been an experienced editor at several top boating magazines (including former associate editor of BoatUS Magazine), worked for the BBC, written four DIY books, skippered two round-the-world yachts, and holds the Guinness World Record for the fastest there-and-back crossing of the English Channel — in a kayak! He and his wife have a Grand Banks 32.