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From: "Carol" <cshenk@virginia-beach.com>
Newsgroups: rec.outdoors.rv-travel
Subject: Re: Charging from tow vehicle
Date: Wed, 26 Feb 2025 19:13:03 -0000 (UTC)
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Ted Heise wrote:

> On Tue, 25 Feb 2025 02:21:21 -0000 (UTC),
>   Carol <cshenk@virginia-beach.com> wrote:
> >  sticks wrote:
> > 
> > > On 2/21/2025 8:49 AM, Ted Heise wrote:
> > > > Hi all,
> > > > 
> > > > Thinking of trading in my Acadia for a new one and the sales 
> > > > rep mentioned something about it having a larger alternator.  
> > > > That make me just idly wonder if it's possible to get a 
> > > > factory installed system that would supply enough power at 
> > > > the 7-pin connector to recharge a LiIon battery while 
> > > > towing.
> > > 
> > > I am about 99.9% sure the answer to your question is no, Ted. 
> 
> > > What you need is very heavy gauge wire from the battery to the 
> > > back of the tow vehicle with a plug for a DC-DC charger if you 
> > > really want the tow vehicle to charge the trailer battery.
> > > 
> > > <https://www.youtube.com/watch?v=V_jHoEEkiUc>
> > 
> >  Think alternatives too.
> > 
> >
<https://www.amazon.com/ECO-WORTHY-1-6KWH-12Volt-Battery-Inverter/dp/B0BN5ZWPK2/>
> > 
> >  That's just one type (and not the cheapest).  What I like too 
> >  here is ALL the parts in one kit.  No going crazy to try to 
> >  piece it all together from separate parts that you aren't sure 
> >  match.
> > 
> >  Just peek about and you'll see simple solutions built to lay 
> >  flat on an RV roof. Flat ones don't draw as well is my 
> >  understanding but then you don't have to move them about, lay 
> >  flat to drive, set them in a 'yard' to be stolen, and a host of 
> >  woes.  On the other hand, the simple ;set out in the ground 
> >  then take in when going elsewhere has it's charm' for off-grid 
> >  folks.
> 
> Thanks for the great thoughts.  I bookmarked the link.  I'm also 
> recalling the Lance has a built in solar panel connector, so need 
> to do some research on what else I might need to make use of that.

Is the 'Lance' a brand of RV?  Anyways you'd need either an inverter or
all DC gear.   Sounds like you don't have the panels.  It we can look
up 'Lance' we could see the specs, likely 12V cabeling type?  (thinner
guage than 24V).

Possible problems: OEM connectors.  Probably not at the inverter side
but may be at the roof to panels.

How flat looking is the roof?  Could it be wired already for a basic
install (with/without inverter). Look for a sort of boxy mounting
bracket near where cables come out and that may be an empty inverter
mount spot?