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From: sticks <wolverine01@charter.net>
Newsgroups: rec.outdoors.rv-travel
Subject: Re: Battery charging/discharging
Date: Thu, 12 Jun 2025 19:48:51 -0500
Organization: A noiseless patient Spider
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On 6/12/2025 12:44 PM, Ted Heise wrote:
> Okay, I made a thread on battery charging a while back, and have
> one additional piece of information to ask about.
> 
> As a review, I have a LiTime 100 Ah lithium ion battery, a
> Prgressive Dynamics power center in my Lance 1475 trailer, and a
> 2023 Acadia Denali tow vehicle.  When I had the trailer connected
> to the battery and the fridge running, the battery app said it's
> discharging with 5.93 hours of use remaining.  After connecting
> the 7-pin to the running Acadia, the battery app then said it had
> 5.35 hours remaining.
> 
> Just to check that the trailer draw hadn'tt changed, I unhooked
> the 7-pin and the ap then said 6.04 hours remaining.  This makes
> me think that not only is the Acadia *not* charging the battery,
> it's system is actually drawing *from* the trailer battery when
> connected.  Maybe because the LiTime is at higher voltage, though
> that's just a guess.
> 
> Any thoughts?
> 
> FWIW, here are the details from each of the three test cases...
> 
> 7-pin        Power     Current   Voltage
> Connected    -220.1 W  -16.7 A   13.2 V
> Dis-connect  -242.2 W  -18.5 A   13.1 V
> Connected    -215.7 W  -16.4 A   13.1 V
> 
> And this was all with the battery SOC being about 98%.

I can't recall from the earlier discussions, but where does the hot 
prong on the 7-pin on the trailer go to?  Does it have a wire going to 
the battery?


-- 
Darwinism Is Junk Science!!