Originally Posted by yostfj
2002 winnebago sightseer if there is no inverter/charger how does the coach batteries maintain their charge when plugged into shore power ? any info. will help. Thanks
First off, about 99% of the Diesel units out there, come with "Inverter/Chargers" of some type and size. While most Gas coaches, typically come with a "Converter/Charger" of some type and size. This is why I always advise folks to "get to know their coaches" when and after they purchase them. This is not meant to be derogatory or, in any way, demeaning. The more you know about your coach, the more you understand it and how each and every system works. And, the more you know about all those, the easier it is, to analyze issues, if and when they crop up.
Now, as for your coach, I'm not all that familiar with that model but, if I'm not mistaken, it's a gas unit, correct? And if so, then, you should, by all means, have at least a "Converter" in it. And, like stated, most Converters also incorporate, a Charging system built into them. If you have any paperwork or, manuals of any type, look into them and see if you can find info on the converter or, Converter/Charger.
Now, with all that being said, an Inverter/charger or, Converter/charger DOES charge the house batteries, when plugged into shore power or, also when the generator is running but, not always. Again, you'll have to see just what model you have. And, some converter/chargers, are not as "smart" as others. In other words, some will over charge house batteries and literally boil them out of fluids.
While others, have "smart" chargers built into them. In that, they notice the amount of charge being applied and, how much voltage etc. is being accepted then, they start to back off until it's just a trickle charge and or, a "battery maintaining charge" of some type. So, again, dig around in your paperwork to see what you've got.
Those Converter/chargers are not that easy to hide either. So, a bit of looking around should reveal it, unless it's inside a panel or, buried in a hidden compartment someplace. Good luck and report what you find.