Do as you wish, but I wouldn't be in such a hurry to fix that which is not broke. Our 2015 has a multi-stage that works fine, and the battery is fine. If you want extra boon-docking capacity, just get another 12V battery, and put it in parallel. Once you get it, you'll find a lot of things to improve or replace. Mattress, shower nozzle, tongue jack, surge suppressor, battery disconnect, new hoses, extension cords, etc, etc.
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Marty and Martha
2015 Z-1 211RD
2012 Nissan Titan
Dalzell SC
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