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Smart Battery Chargers: Newmar Earns Best Buy
The commercial-grade Mastervolt has it all. The Newmar offers the best value, and the Charles Industries charger is best-suited for lead-acid batteries. The Guest lacks features, in our opinion. The ProMariner has installation issues.
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Top row (L to R): Xantrex TC20+, Newmar PT-25, Guest 2632A. ûForeground: Charles 2000SP / 5000SP (left), ProMariner 1220 (top), Mastervolt û12/25-3 (bottom).
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Fifteen years ago battery technology for vessels whose house battery banks had large load requirements started to slowly shift from automotive-based lead acid designs to absorbed glass mat (AGM) and gel-based batteries (found in the aviation field). It was only a matter of time before the battery charger designers caught up with the advances in battery technology and replaced their low-tech ferroresonant, transformer-based battery chargers with something smarter. Now these chargers can not only handle lead-acid batteries—still the most popular and inexpensive type of battery aboard recreational boats—but also gel and AGM batteries. …
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