From: theise@panix.com   
      
   On Wed, 5 Mar 2025 19:55:25 -0600,   
     sticks  wrote:   
   >  On 3/5/2025 2:03 PM, Ted Heise wrote:   
      
   > > My thinking was to take a reading from the LiIon battery app   
   > > with the battery connected to the trailer and then with the   
   > > fridge started (I think it may run off the batt for a minute   
   > > or two). Then I would connect the 7-pin to the running TV and   
   > > repeat these readings.  Does that seem like a reasonable   
   > > approach?   
   >   
   >  In truth, I think it is pointless in your case.  I think we   
   >  already have agreed now you simply cannot get enough power to   
   >  charge your lithium batteries from the 7 prong.  I would,   
   >  however, like to know if there is power coming in, and going   
   >  out to the trailer.  If there is a power wire hooked up on the   
   >  7 prong on the trailer, where exactly does that power go?   
   >  Obviously the trailer lights you can easily figure out, and   
   >  they don't use power from the trailer battery.  They draw   
   >  directly from the towing vehicle.  Usually the power tab is for   
   >  trailer brakes, or an accessory of some sort or another.  Were   
   >  you under the impression it somehow went to your battery?   
   >  Obviously it can't go directly there since it would be   
   >  incapable of charging lithium batteries, so does it go to the   
   >  controller you speak of later?  You need to find out exactly   
   >  where that power goes, and here's why.   
      
   Okay, here are some aditional points of information.   
      
   I'm positive there is power coming out of the 7-pin connector,   
   because I've frequently operated the powered lift jack without any   
   battery connected (i.e., only the 7-pin connected to the trailer).   
      
   Pretty sure there is power going into the trailer too, because my   
   memory (though not certain) is that the interior lights and other   
   12 V things work in the same circumstance (i.e., no battery   
   connected, just the running TV).   
      
   As I lay awake in bed last turning this over and over in my mind,   
   I seemed to recall the Acadia had a 110 V outlet in the second row   
   of seats.  Indeed there is when I checked it this morning.  Rated   
   at 150 W max, it seems I could use this with my NOCO GENIUS 5   
   charger (max 75 W draw) to charge the trailer battery in a pinch.   
   Might could even use it to run the coffee grinder.  ;)   
      
   Gotta run to see the cardiologist now, but will come back to this   
   later today.   
      
   --   
   Ted Heise             West Lafayette, IN, USA   
      
   --- SoupGate-DOS v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)