Interesting video. Thanks for sharing this with the list Peter.


Mike Riter
SV Emma B

On Thu, Aug 11, 2022 at 2:52 PM Peter Nyberg <peter at sunnybeeches.com> wrote:

> There's been some interest in this topic in the past, and I recently
> stumbled upon a different take on the subject that I found interesting, and
> I thought I'd share.
>
> LiFePO4 batteries have some benefits that everyone at all interested is
> probably already aware of, but they also have some potential problems.  The
> biggest problems stem from the fact that the Battery Management System
> (BMS), may decide in some situations to take the battery offline.  If you
> are entirely dependent on the lithium batteries, this would leave you
> entirely without power.  In addition, if you were charging your lithium
> battery with an alternator at the time of disconnect, it is likely that the
> alternator would be ruined.
>
> There are complicated solutions to this problem involving additional
> equipment, but there's a guy who proposes the best approach is to just
> combine LiFePO4 and lead-acid batteries into a single battery bank.
>
> I won't bother trying to explain, because he does a pretty good job of it
> himself:
>
> https://www.youtube.com/watch?v=tAuPfgZgXec
>
> He's got a few more related videos on his YouTube channel, if you continue
> to be interested.
>
> --Peter
>
> P.S.  I'm not seriously considering doing this on my boat.
>
>