Even though the Progressive Dynamics PD9280 converter is a smart, multi-stage battery charger, a small bit of boil-off is possible. I'd suggest the addition of a good battery watering system such as the Flow-Rite. Our Mobile Suites is plugged into shore power continuously. I use this and water the batteries monthly - they take VERY little water, and it's a lot easier than having to pull caps, see the electrolyte level and add distilled water manually.
Rusty
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Rusty, Sandy, 2 Shelties (Coby & Callie) & Conner the Campground Cat
2016 Ram 3500 Longhorn Crew Cab 4x4 Dually, 385/900 Cummins, Aisin AS69RC, 4.10 axle, 39,100 GCWR, 30,050 trailer tow, B&W RVK3600
Current: 2014.5 DRV Mobile Suites 38RSSA #6972 - Previous: 2004 MS 36RE3 #1291
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