Wondering if dealer did any damage.
In 2017 when we bought our brand new Airstream TT, we had the dealer add the airstream 90 watt solar package. He did so, and we have been using it for the last 4 years. I am considering adding more so...
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Check the panel Voc (open circuit), Isc (short circuit) to verify the panel is OK. With the panel and with the panel - wire corrected measure the controller + amps to the battery with a discharged battery. I'll bet a dounut that you'll find everything OK and you've not had prior solar charging.
