<html>
<head>
<meta content="text/html; charset=ISO-8859-1"
http-equiv="Content-Type">
</head>
<body bgcolor="#FFFFFF" text="#000000">
The real point is that the Xantrex guy is correct from a scientific
stance. Experimental battery cycle life data shows that some golf
cart batteries (T105) do have more rated cycles to 80%DOD than the
Trojan L16. (750 vs about 600) A really crappy golf cart battery
(some have cycle life below 400 cycles) isn't as good as an L16,
yes. You have to base your decision, and your mouth, on test data
for the batteries considered. Also, you must always compare at 80%
DOD, for an apples to apples comparison. Its usually a clue if a
manu doesn't publish their cycle life data. Of course you must
temper the golf cart vs L16 decision with good paralleling
technique.<br>
We use golf cart batteries (never more than 4 strings), jump
straight to the HUPs for larger banks, and skip the L16s all
together. They just don't make sense when you look at the cost/ amp
hr vs their lifespan.<br>
The only time I could see using L16s, was if the battery bank
requirements were beyond 4 strings of golf cart batteries, and the
customer just could not afford the HUPs, or were going to sell the
property soon, and wouldn't appreciate their long term value.<br>
I've spent a lot of time looking at cycle life data, comparing
costs, adding in maintenance and replacement labor, etc..<br>
L16s are serious losers on a $/ kwh operating cost comparison, so
this is a chance to up sell the customer to HUPs (or equivalent) and
make both of you happier in the long run.<br>
<br>
Ray Walters<br>
<br>
<br>
<br>
<br>
On 9/16/2011 10:15 AM, Larry Crutcher, Starlight Solar wrote:
<blockquote cite="mid:90086736AAF242A481061621BC1F179B@StarlightPOS"
type="cite">
<div dir="ltr">
<div style="FONT-FAMILY: 'Calibri'; COLOR: #000000; FONT-SIZE:
12pt">
<div>Hi Ron,</div>
<div>Have a look back a few months ago to the discussion about
multiple battery strings. My synopsis: large, parallel banks
are not good; fewer strings are always better. How large a
bank are we talking about here?</div>
<div> </div>
<div>Scientist?? That sounds kind of like “Yea, I been a
‘lectrician for XX years...”, something I have heard
hundreds of times. It’s just pride saying “Look, I can pee
that far too!” when in reality they are clueless about DC
power systems. I’m ranting but my point is you should
convince your customer that a hands-on, real world
experienced professional has a much broader understanding of
RE system intricacies than a “scientist”.</div>
<div> </div>
<div>Larry</div>
<div style="FONT-STYLE: normal; DISPLAY: inline; FONT-FAMILY:
'Calibri'; COLOR: #000000; FONT-SIZE: small; FONT-WEIGHT:
normal; TEXT-DECORATION: none">
<div style="FONT: 10pt tahoma">
<div> </div>
<div style="BACKGROUND: #f5f5f5">
<div style="font-color: black"><b>From:</b> <a
moz-do-not-send="true"
title="solareagle@solareagle.com"
href="mailto:solareagle@solareagle.com">Ron Young</a>
</div>
<div><b>Sent:</b> Thursday, September 15, 2011 5:11 PM</div>
<div><b>To:</b> <a moz-do-not-send="true"
title="re-wrenches@lists.re-wrenches.org"
href="mailto:re-wrenches@lists.re-wrenches.org">RE-wrenches</a>
</div>
<div><b>Subject:</b> Re: [RE-wrenches] battery cycle
life, US Battery</div>
</div>
</div>
<div> </div>
</div>
<div style="FONT-STYLE: normal; DISPLAY: inline; FONT-FAMILY:
'Calibri'; COLOR: #000000; FONT-SIZE: small; FONT-WEIGHT:
normal; TEXT-DECORATION: none">Hi Larry,
<div>Client has asked me to compare the cycle life because
he is upgrading a large battery bank and has been
convinced by a Xantrex "scientist" that golf cart
batteries are superior to L-16's even though it involves
twice as many batteries, connections, cells, footprint
etc. So to convince his purchasing committee he wants to
know the difference in cycle life between a U.S.B 208 and
a Surrette S-460.</div>
<div> </div>
<div>Ron</div>
<div> </div>
</div>
</div>
</div>
<br>
<fieldset class="mimeAttachmentHeader"></fieldset>
<br>
<pre wrap="">_______________________________________________
List sponsored by Home Power magazine
List Address: <a class="moz-txt-link-abbreviated" href="mailto:RE-wrenches@lists.re-wrenches.org">RE-wrenches@lists.re-wrenches.org</a>
Options & settings:
<a class="moz-txt-link-freetext" href="http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org">http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org</a>
List-Archive: <a class="moz-txt-link-freetext" href="http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org">http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org</a>
List rules & etiquette:
<a class="moz-txt-link-abbreviated" href="http://www.re-wrenches.org/etiquette.htm">www.re-wrenches.org/etiquette.htm</a>
Check out participant bios:
<a class="moz-txt-link-abbreviated" href="http://www.members.re-wrenches.org">www.members.re-wrenches.org</a>
</pre>
</blockquote>
</body>
</html>