La Nomade.. why did you hijack this OPs thread with your own vanity-pics?
P and Y: The converter is what supplies charging circuit to your battery. It does so thru the battery "switch" also known as the "Use/Store" switch. Make certain that switch (big lever, usually located near front cabinetry inside the trailer) is on "USE".
If still no charge, check the fuses and operation of the 12 volt
circuitry of the converter, usually located near the floor behind a black plastic hinged cover.
I live just west of Austin and have the same model 22' Sport and if you need help, maybe we can meet and I'll help you check it out.