Re: (ET) charger voltage

[PH <pholzsc yahoo com>]

To all
If you use normal lead-acid batteries and your ET
charger is in good shape, then the Landis controller
is the best way to KEEP the pack charged ALL the time.
I'm on my 4th year with six T105s and the Landis.
Every week before I mow, the pack is fully charged
automatically.
Thanks
Paul Holzschuher
E15 and C145 

--- john briese <goodguyforsure hotmail com> wrote:

> David:
> Until you've used the Landis....give it a rest...I
> love mine...I have 4 
> years on the batteries so far and I love the
> controller.
> John Briese
> I-5
> 
> 
> >From: "David Roden" <etpost drmm net>
> >Reply-To: noaddress drmm net
> >To: elec-trak cosmos phy tufts edu
> >Subject: Re: (ET) charger voltage
> >Date: Fri, 28 Jul 2006 17:20:32 -0400
> >
> > > New batts are about 6.5 ea.
> > > Average batteries chg to about 6.25 6.3
> >
> >Open-circuit, maybe; but if you expect a full
> charge in a reasonable amount
> >of time, the charger needs to push them to around
> 7.4 - 7.5 volts 
> >(on-charge
> >voltage) with current down around C/50 (4-6 amps
> for a golf car battery).
> >At lower voltages you essentially have a float
> charger.  Yes, it can charge
> >the battery, but it could take >weeks< to achieve
> full charge.
> >
> > > Landis controller ...
> >
> >I've posted here about this before and I'm not
> going to get into it in
> >detail yet again.  If you're interested, check the
> archives.
> >
> >Briefly, as I see it, Harry Landis's device is a
> battery maintainer, not a
> >charge controller.  If you can use it with any kind
> of success as a charge
> >controller, it's purely by luck and accident.  I
> imagine that Mr Landis
> >disagrees with me though. ;-)
> >
> >In any case you won't find one on my batteries.  I
> don't need a maintainer.
> >
> > > Occasionally. people 'equalize' batteries by
> intentionally overcharging.
> > >  This ain't good for them.
> >
> >There's no other way to equalize batteries, unless
> you have access to the
> >individual cells (I don't know of any golf car
> battery on which that's 
> >still
> >possible, as all intercell connectors are now
> internal).  If equalization 
> >is
> >performed at reasonably low currents, the battery
> gains more life by
> >avoiding sulfation (proper charging), than it loses
> from grid corrosion
> >(overcharging).
> >
> > > ... gotta build a desulfater ...
> >
> >I know this will annoy the "true believers," but I
> have yet to see any
> >concrete evidence that a "desulfator" does anything
> significant other than
> >applying a long, slow equalizing charge.  The
> pulsing nonsense has no real
> >effect ("crystal resonance"???!) and is just an
> excuse to charge you more
> >money. ;-)
> >
> > > Charge em to the point that every cell is
> gassing.  Then leave em
> > > overnite to remove 'surface charge'.  Test em in
> the morning.   That
> > > will tell you where your batts are at agewise.
> >
> >This will work; but IMO, it's more accurate to
> measure voltage while on
> >charge.  Charge until the on-charge voltage stops
> rising, and note what 
> >that
> >voltage is.  It will fall as the battery ages. 
> (DV/DT is also a fine
> >strategy for charge control, btw.)
> >
> >
> >David Roden - Akron, Ohio, USA
> >
> >= = = = = = = = = = = = = = = = = = = = = = = = = =
> = = = = = = =
> >Note: mail sent to the "etpost" address will not
> reach me.  To send
> >me a private message, please use "evadm at drmm
> period net."
> >= = = = = = = = = = = = = = = = = = = = = = = = = =
> = = = = = = =
> >      If all our bicycles turn into cars, that's a
> horrible figure.
> >     It would scare the world.
> >
> >            -- Zhai Guangming, China Natl.
> Petroleum Corp.
> >
> >= = = = = = = = = = = = = = = = = = = = = = = = = =
> = = = = = = =
> >
> >
> >
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>
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> 
> 
> 
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