Monday, June 13, 2011

Re: [Electric Boats] Re: first run

 

Eric:
 
I think you meant the E-Xpert Pro HV made by TBS right?  The standard E-Xpert Pro does not handle 48 volt banks. Just curious were you able to buy the unit here in the U.S.?  I will sing the praises of TBS who make similar units for companies like Xantrex which are sold in the U.S. Xantrex whose poor customer service almost cost me an extra $300 when the display on my XBM battery monitor failed two years ago. TBS was able to supply me with a new display for $15 plus a wire transfer fee.
Where as Xantrex customer service said that parts were unavailable and that I would have to buy a new unit because it was just a month past the warrenty. Happily that meter is still working fine with the new display as  I have learned not to operate it out in the sun which caused the failure of the first display.
 
Capt. Mike


--- On Mon, 6/13/11, Eric <ewdysar@yahoo.com> wrote:

From: Eric <ewdysar@yahoo.com>
Subject: [Electric Boats] Re: first run
To: electricboats@yahoogroups.com
Date: Monday, June 13, 2011, 5:15 AM

 
Hi Richard,

I would also be interested in hearing about your batteries. Do you know what parameters the EY display is using for your "time remaining" value? Does it assume a 100% discharge?

On my boat, the E-Xpert Pro meter has settings that define the discharge "floor" for the battery bank. With my 160Ah 50V Lithium battery pack, I chose an 80% discharge limit for the time remianing calculations. That means that the meter "sees" my pack as 128Ah, meaning that when if the gage ever gets to "empty" I'll have a reserve of about 30Ah left. I've heard that many people use 50-60% max discharge (Dragonfly uses 50%) for flooded batteries and AGM can be regularly run down to 65-70% discharged. I like the E-Xpert Pro because it can be configured for different pack sizes, chemistry types and personal preferences.

Fair winds,
Eric
Marina del Rey, CA

--- In electricboats@yahoogroups.com, "acsarfkram" <acsarfkram@...> wrote:
>
> Hi Richard,
>
> Your performance numbers look great for the Alberg 30. What's your battery setup?
>
> Mark
> Santa Cruz
>
> --- In electricboats@yahoogroups.com, Richard Mair <fullkeel2000@> wrote:
> >
> > Apart from going to the dock from the slings Into The Blue had its first unexpected run today..There are high easterly winds coming tonight and that is the only direction that causes a problem for us
> > Had a 2.4 mile run up the Northwest arm (for those who know Halifax NS waters)
> >    Ran up the arm at 20-22 amp draw and was reading a speed of 3.5 knots at about 960 rpm..This is a new speed gauge so Ii do not know how accurate it is as no adjustments made yet. The EY gauge display said I could do this for about 8 hours at the start. Fluctuated between 7.8and 7.5 on the way up..Current was with us and a slight headwind..
> >   On the way back down I will take some more readings and compare to the GPS speed.The tide will probably be against us at that time..I did try one burst to 56 amps and 4.5 knots..
> >  After a couple hours the no load battery reading was back to 50.60 volts...So far figures a seem a bit better than anticipated..
> >   Seem pretty good for a 30 foot 9000 lb displacement fullkeel.  We could actually talk during the trip
> > Richard Alberg 30 Electric Yacht 100ibl system
> >
>

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