Monday, May 2, 2011

Re: [Electric Boats] regen

 

Hi Mark,

I would assume that your meter should show charging amps, regardless of the source. So, you should see current when you're plugged in at the dock too.

For your other question, I haven't seen a sign of current going back into my batteries under sail.... yet. It's more than a nautical mile from my slip to the open ocean, so by the time I get out, I've usually used at least 300Wh (6Ah), more if want to get out there quicker. So under sail, I'm typically sitting below a 95% SOC. My charger will start up by pushing the full 28A when I plug in. So the batteries are ready to accept a charge, I just haven't seen it yet. Of course, the prop sitting in an aperture behind a thick keel doesn't help.

Fair winds,
Eric
Marina del Rey, CA

--- In electricboats@yahoogroups.com, "acsarfkram" <acsarfkram@...> wrote:
>
> Hi Chris,
>
> The Turnigy Watt Meter that I have has to have the leads reversed to read amps in verses amps out. I did add a switch to do that but have yet to see amps flowing into the batteries. I have seen 4 amps at 48 volts register on the PakTrakr. I think the Turnigy might not be sensitive enough at low current, although it will read 10's of an amp battery to motor.
>
> Back to my question about trying to recharge a full bank with regeneration. Has anyone monitored regeneration when their batteries are at a low SOC?
>
> Mark
> Santa Cruz
>
> --- In electricboats@yahoogroups.com, chris Baker <chris@> wrote:
> >
> > Hey Mark,
> >
> > Why doesn't the watt meter show some amps going into the batteries? Does it not count "backwards"?
> >
> > Cos I would have thought the current is going back in the same way that it came out...
> >
> > Cheers
> >
> > Chris
> >

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