I have been using a Xantrex Link-Pro (made by TBS) on my 48V launch. This model requires a pre-scaler to work with a 48V bank, and in doing so you lose some of alarm features. I wasn't concerned about this, since my BMS deals with the voltage monitoring on a cell-by-cell basis, something the Xantrex doesn't do.
I used a Belktronix pre-scaler. Very reasonably priced, and excellent customer support after the sale.
The Link-pro does a great job of monitoring AH consumed and replenished, and run time remaining.
If I had it to do over again I would buy the TBS model that has no need for a pre-scaler at 48V.
http://www.tbs-electronics.nl/products_expertpro_features.htm
I didn't know about them at the time I bought my Link-Pro. You'll need to import them from Canada.
-Tom
--- In electricboats@yahoogroups.com, David Goldsmith <suntreader@...> wrote:
>
> This is exactly the question I've been meaning to ask. I can put an ammeter
> on the motor leads to tell how much juice the motor is taking but really
> that's not even what I'm interested in. I want to know the net juice flowing
> into and out of the battery bank and a 'fuel gauge' type reading of how much
> energy is in the bank.
>
> One benefit of such a system that occurred to me is when underway with the
> battery bank full, I can balance the output of the solar panels and the
> motor turning slowly over and get a little boost from the solar power that
> otherwise would be going to waste. I know even with a few hundred watts of
> solar it wouldn't be much but it could help.
>
> I was going to order the PakTrackr but now I'll wait to see what the group
> has to say.
>
> David
>
> On Wed, Oct 13, 2010 at 1:17 PM, Doug <dj2210@...> wrote:
>
> >
> >
> > What is everyone using to measure their run time or capacity left on the
> > battery bank. I am familiar with the PakTrakr but are their any others for a
> > 48v system?
> >
> >
> >
>
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