[RE-wrenches] RETURN AMP SETTING

[Dana]

As the % of full charge is related to the of degree
absorption & gravity [the denser & more charged acid
descending, and lighter acid rising] @ what point in the
absorption would be prudent to stop charging?

 

I used to cut off the charge on the Trace SW series at 12
"return amps", VS. the factory default I think was at 5
amps.  This has & continues to work well but I never had
anyone really answer this function clearly.

 

Is there a battery manufacturer  or wrench that would care
to comment on the:  

The minimum "Return" amps to disconnect for a "full" charge?

OR

The time required per 100 AHR after reaching the Absorption
point setting for the mix to occur?

 

I realize that battery construction, battery condition, age
and temperature and the current power usage will also play
into this factor and it may not be a simple answer.

 

 

 

 

 

 Dana Orzel

 

Great Solar Works, Inc

E - dana at solarwork.com

V - 970.626.5253

F - 970.626.4140

C - 970.209.4076

web - www.solarwork.com

Responsible Technologies for Responsible People since 1988"

 

From: re-wrenches-bounces at lists.re-wrenches.org
[mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf
Of Mark Frye
Sent: Wednesday, July 21, 2010 4:25 PM
To: Allan at positiveenergysolar.com; 'RE-wrenches'
Subject: Re: [RE-wrenches] Propane Generator, Dual Outback
Inverters

 

Allen,

 

Can I infer that if you are shutting off the gen before
charge rates drop in absorption that you are running only
briefly in the absorb phase? Or do your charge currents
remain high through out an extended absortion phase?

 

Perhaps you have plenty of PV which you rely upon to bring
the batteries up through the absorption phase, once the gen
is shut off.

 

I would be interest to learn more about your approach to
this.

 

Thanks,

 
Mark Frye 
Berkeley Solar Electric Systems 
303 Redbud Way 
Nevada City,  CA 95959 
(530) 401-8024 
 <http://www.berkeleysolar.com/> www.berkeleysolar.com  

 

 

  _____  

From: re-wrenches-bounces at lists.re-wrenches.org
[mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf
Of Allan Sindelar
Sent: Wednesday, July 21, 2010 3:17 PM
To: re-wrenches at lists.re-wrenches.org
Subject: Re: [RE-wrenches] Propane Generator, Dual Outback
Inverters

The Onan RS20000 shown in the generators article in HP 131
page 98 has performed flawlessly as backup support to an
Outback quad-stack of VFX3648s. Differences, however, are
that this 20kW gennie charges four inverters, rather than
two; the elevation is 6,600 feet for about a 20% output
deration; there are no huge loads above charging draw; and
the client is aware enough to shut it off before absorption
reduces the charge rate - all different conditions than you
have described, as the gennie is usually fully loaded and
running in balance.

Darryl is right about the amount of words necessary.

Allan Sindelar
 <mailto:Allan at positiveenergysolar.com>
Allan at positiveenergysolar.com
NABCEP Certified Photovoltaic Installer
EE98J Journeyman Electrician
Positive Energy, Inc.
3201 Calle Marie
Santa Fe, New Mexico 87507
505 424-1112
 <http://www.positiveenergysolar.com/>
www.positiveenergysolar.com

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