New Charger for New AGM battery bank


Hi Jeff, I own a Catalina 34 sailboat from the mid ‘80s. It’s a newish boat to me. I’m replacing the 4, 6v flooded batteries with 4 new 225Ah AGM batteries. The separate starter battery is also a new 12v AGM. My questionis I’m guessing that I should replace my current battery charger, a Guess Charge Pro from 2003. Can you give me some suggestions so far as output, brand,etc? Also, as I calculate it, my house bank wired in Serial/Parallel has a total 12v, 450Ah. Isthis correct?

Thanksfor your help,



Hi Dave, I suggest you look at the Promariner ProNautic 50 or preferably 60 amp battery charger, as your house battery bank capacity is 450Ah at 12 VDC and you need a minimum of 45 amps of charge rate. - Jeff

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