Whatever "lesson" you refer to might benefit others if you would elaborate.
Read the original post and it sounded like he thought the stealth style charger was the same as tje plug in AC. Chargers. I am no marine mechanic or electrician but was simply trying to inform that the on the run style chargers are not the same as your typical charger.
Wrench since you are a mechanic why not advise the OP to help him? I am sure you know more than me about how the stealth works differently than AC chargers. Give a reccomendation. I was simply tryi g to help. And by all means if I am wrong than tell me. I would like to know myself.