I have never had to add water to any of the 3 batteries in my 2016 Vegas. It is always plugged into at least 20 AMP. We have had for 22 months and 13,200 miles. When we use at racetrack overnight with heat, we see only a loss of 1 red bulb on panel in morning.
I have heard about many battery issues, I have not seen any with our unit.
It generaly never sis 2 or 3 weeks.
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