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<div class="moz-cite-prefix"><br>
In addition, when someone leaves the system for long periods of
time, the ending amps can help BUT that is<br>
not the same as giving them a good de-sulfating Absorb cycle once
in a while.<br>
<br>
This is where it is nice to give them a good Absorb for some hours
without the ending amps but only<br>
every so often. Maybe once per week or two ? Jay and I talked
about a "Vacation Mode" a while back..<br>
<br>
The Classic can be set to skip a number of days of Bulk/Absorb
cycles. This works well.<br>
You can also set a high battery temperature to stop charging at.
It's in one of the CHARGE menus.<br>
<br>
There are all sorts of neat things you could do to keep FLA
batteries alive longer I think.<br>
Like what Kent Osterberg in Oregon mentioned... Every so many
days, start a timed Absorb<br>
after the current has fallen below ending amps.<br>
<br>
So many good ideas, so little time !<br>
<br>
boB<br>
<br>
<br>
<br>
On 5/22/2015 10:17 AM, Dan Fink wrote:<br>
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cite="mid:CAF+3LnfPRVgagsFc1zsO5g6nJFFED3oF3CZJKBedoL9yh65_ig@mail.gmail.com"
type="cite">
<div dir="ltr">Bill; The Whizbang can mount on the main shunt, and
has an included mounting option that lets you piggyback the
wires from another amp-hourt meter on it. I have mine with a
magnum ME-BMK piggybacked on it.</div>
<div class="gmail_extra"><br clear="all">
<div>
<div class="gmail_signature">
<div dir="ltr">Dan Fink
<div>Buckville Energy</div>
<div>IREC Certified Instructor™ for: </div>
<div>~ PV Installation Professional</div>
<div>~ Small Wind Installer</div>
<div>NABCEP / IREC / ISPQ Accredited Continuing Education
Providers™<br>
970.672.4342<br>
<br>
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<br>
<div class="gmail_quote">On Fri, May 22, 2015 at 8:28 AM,
frenergy <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:frenergy@psln.com" target="_blank">frenergy@psln.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="#ffffff">
<div>Hey Jay,</div>
<div> </div>
<div> From what I've heard form battery manus, the
C rates likely even in a well PV-ed system still will
not produce C-rates high enough to approach a high or
"longevity reducing" internal battery temp, assuming a
typical bulk, absorb, float cycle. Of course, battery
environmental location (typical temps) would set a
baseline from which batt temp would rise from. Here in
the Sierra, ambients are not very high 95% of the time.</div>
<div> </div>
<div> Just curious, how does the wiz bang account
for all loads...2 shunts?</div>
<div> </div>
<div>Thanks,</div>
<div>Bill</div>
<div>Feather River Solar Electric</div>
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<div class="h5">
<div style="FONT:10pt arial">----- Original Message
----- </div>
<div style="BACKGROUND:#e4e4e4;FONT:10pt arial"><b>From:</b>
<a moz-do-not-send="true"
title="jay.peltz@gmail.com"
href="mailto:jay.peltz@gmail.com"
target="_blank">jay peltz</a> </div>
<div style="FONT:10pt arial"><b>To:</b> <a
moz-do-not-send="true"
title="re-wrenches@lists.re-wrenches.org"
href="mailto:re-wrenches@lists.re-wrenches.org"
target="_blank">RE-wrenches</a> </div>
<div style="FONT:10pt arial"><b>Sent:</b> Thursday,
May 21, 2015 8:07 PM</div>
<div style="FONT:10pt arial"><b>Subject:</b> Re:
[RE-wrenches] FLA battery setpoints with larger
arrays</div>
<div><br>
</div>
<div dir="ltr">Hi Allan,
<div><br>
</div>
<div>I like the classic/wiz bang jr. This allows
really good end amp control as all loads are
accounted for.</div>
<div><br>
</div>
<div>Higher C rates equal higher internal temps
which definitely will shorten the life.<br>
<div class="gmail_extra"><br>
<div class="gmail_quote">On Thu, May 21, 2015
at 10:56 AM, Allan Sindelar <span dir="ltr"><<a
moz-do-not-send="true"
href="mailto:allan@sindelarsolar.com"
target="_blank">allan@sindelarsolar.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote"
style="PADDING-LEFT:1ex;MARGIN:0px 0px 0px
0.8ex;BORDER-LEFT:#ccc 1px solid">
<div
style="COLOR:rgb(0,0,0);BACKGROUND-COLOR:rgb(255,255,255)"
text="#000000" bgcolor="#FFFFFF">Wrenches,<br>
In the last few years I have changed my
approach to off grid system sizing,
primarily due to higher battery costs
and lower module costs. Rather than
shooting for a traditional 80-90% of
winter load profile target, I will size
a larger array and smaller battery bank,
figuring (especially here in the sunny
Southwest) that batteries will recharge
more quickly, will spend more of their
time full (and thus last longer), and
will be at least partially charged
during cloudy weather. This even allows
for smaller battery banks that are
cycled more deeply (as long as there's a
backup gennie in the mix); the lower
cost of a smaller size may allow for a
set of higher-quality industrial cells.<br>
<br>
I first began to rethink my design
approach after reading Christopher
Freitas' Solar Pro article on large
battery banks a few years ago. Being
able to refill in a day was part of his
strategic approach to battery bank
design. I used and wrote about this
approach in my tiny house article in the
current Home Power. However, I'm just
beginning to get owner feedback about
greater water consumption and the need
for more frequent watering. This is
especially the case when I add array to
an existing system, and the old watering
schedule is suddenly not enough. <br>
<br>
When I design new systems I now
encourage larger arrays and smaller
battery banks, as the batteries spend
more of their time happily full and
recover more quickly after a discharge
period. But I am thinking that I will
have to begin changing charging
setpoints in response. Flooded batteries
have a range of recommended bulk
setpoints, from 28.8 to 29.6 volts on a
24V system. When arrays were smaller we
set to the higher end of the range to
take advantage of topping off when
available, and a two hour or longer
absorption was considered beneficial, as
long as the CC could transition to float
at 2% of capacity or so. With a larger
array a better approach may be to lower
the bulk/absorption setting, as well as
reduce absorption time and raise the
float transition current ("done amps").
<br>
<br>
I'm writing to encourage a discussion
among off grid Wrenches. Are you
changing the relative relationship
between array and battery capacities? If
so, how are you adjusting charge
controller setpoint programming? For
example, how would you program a Midnite
Classic, Outback FM or Schneider XW if
you could achieve a C/10 or C/15 charge
rate?<br>
<br>
Thanks, Allan<span><font color="#888888"><br>
<div>
<div>
<p class="MsoNormal"><b>Allan
Sindelar</b><br>
<span style="FONT-SIZE:10pt"><a
moz-do-not-send="true"
href="mailto:allan@sindelarsolar.com"
target="_blank">allan@sindelarsolar.com</a></span><br>
<span style="FONT-SIZE:10pt">NABCEP
Certified PV Installation
Professional<br>
NABCEP Certified Technical
Sales Professional<br>
New Mexico EE98J Journeyman
Electrician<br>
Founder (Retired), <span>Positive
Energy, Inc.</span><br>
<b><a moz-do-not-send="true"
href="tel:505%20780-2738" value="+15057802738" target="_blank">505
780-2738</a> cell</b></span>--
<br>
</p>
</div>
</div>
</font></span></div>
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<div dir="ltr">
<div>
<div dir="ltr">
<div>Jay Peltz<br>
Peltz Power<br>
<a moz-do-not-send="true"
href="mailto:jay.peltz@gmail.com"
target="_blank">jay.peltz@gmail.com</a><br>
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