Q&A—Are Battery Desulphators a Good Idea?

41kZZ2EyAPLQuestion

From member Conner:

I was wondering if there is any instance or reason you are aware of where a continuous battery maintainer/desulphator would be bad for AGM batteries? Unfortunately we live on shore power a lot right now, and I wanted to buy a maintainer for our AGM starting batteries to live on, such as this one. [A combined desulphator and charger.]

The distributor said I did not need it, and actually said to not get it. Do you know of any reason why a maintainer/desulphater for AGM batteries, hooked up full time to AGMs, would be harmful? (Full River AGM batteries)

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John was born and brought up in Bermuda and started sailing as a child, racing locally and offshore before turning to cruising. He has sailed over 100,000 miles, most of it on his McCurdy & Rhodes 56, Morgan's Cloud, including eight ocean races to Bermuda, culminating in winning his class twice in the Newport Bermuda Race. He has skippered a series of voyages in the North Atlantic, the majority of which have been to the high latitudes. John has been helping others go voyaging by sharing his experience for 25 years, first in yachting magazines and, for the last 20 years, as co-editor/publisher of AAC.

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