ATF: Greystone - Converter model

On our 2011 Greystone 29MK, we are replacing the single 12V battery with four 6V golf cart batteries; approximately 440 amp-hour total capacity. What is the make/model of the converter? What is its maximum charging capacity? Is it a smart charger? Does it need any reprogramming to accommodate the new battery set? When in storage, does the converter have a desulphation mode, or should we use something like a Battery Tender?
 
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