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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Wrenches,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Dana,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Battery banks can be configured with parallel strings, each string consisting of the number of units to meet the 12V, 24V or 48V battery bank voltage required
by the design. The recommended maximum number of strings in parallel is 4. The lesser number of string in parallel will reduce the chance of dealing with cells unbalances, which inevitably occur over time, for the reasons you mentioned. I tend to limit the
number of strings in parallel to 1 to 3 max whenever possible and especially in large battery banks. When push comes to shore, for very large Ah capacity applications it is recommended to have separate battery banks, each with their own independent charger,
then parallel the battery banks and use blocking diodes. <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">John<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt">John F. DeBoever<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt">Global Technical Director – Renewable Energy<o:p></o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt">Trojan Battery Company<o:p></o:p></span></b></p>
<p class="MsoNormal"><span style="font-size:8.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt">12380 Clark Street <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt">Santa Fe Springs, CA 90670<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt">Tel: +1-562-236-3000 Ext. 3139<o:p></o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;color:#953735;mso-style-textfill-fill-color:#953735;mso-style-textfill-fill-alpha:100.0%">Cell: +1-845-514-7600 – NY office time zone: USA EST (GMT-5)<o:p></o:p></span></b></p>
<p class="MsoNormal"><span style="font-size:9.0pt">Skype: john.f.deboever<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt">Fax: +1-562-236-3239<o:p></o:p></span></p>
<p class="MsoNormal"><a href="mailto:jdeboever@trojanbattery.com"><span style="font-size:9.0pt">jdeboever@trojanbattery.com</span></a><span style="font-size:9.0pt"><o:p></o:p></span></p>
<p class="MsoNormal"><a href="http://www.trojanbattery.com/"><span style="font-size:9.0pt">www.trojanbattery.com</span></a><span style="font-size:9.0pt"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> re-wrenches-bounces@lists.re-wrenches.org [mailto:re-wrenches-bounces@lists.re-wrenches.org]
<b>On Behalf Of </b>Dana<br>
<b>Sent:</b> Thursday, February 16, 2012 11:30 AM<br>
<b>To:</b> 'RE-wrenches'<br>
<b>Subject:</b> [RE-wrenches] Quantity of L-16 in a string<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-size:14.0pt;font-family:"Century Gothic","sans-serif"">Question to the battery wizzs’ here and this may have some impact on the current thread.–<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:14.0pt;font-family:"Century Gothic","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:14.0pt;font-family:"Century Gothic","sans-serif"">I was told long ago by a Trojan battery rep. in 1990? that we should not extend beyond [12] L-16s in a bank due to too many connections and to many cells to achieve
a really go balance on the cell to cell charge. I have seen this to be a reality over the years though I have no concrete evidence other than observation. The more L-16s in a bank the more imbalance or probability of imbalance due to the greater of cells
and interconnects, points of connection, number of strings. <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:14.0pt;font-family:"Century Gothic","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:14.0pt;font-family:"Century Gothic","sans-serif"">At [12] L-16s I have seen the longest life at 8-9 years and any # of batteries beyond it drops off to the 5-7 year range. This is all, off grid observations as I have
not seen any L-16 wet lead acid in grid tie applications.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:14.0pt;font-family:"Century Gothic","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:14.0pt;font-family:"Century Gothic","sans-serif"">Manufacturers could you chime in and wrenches what is your experience?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:14.0pt;font-family:"Century Gothic","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:14.0pt;font-family:"Century Gothic","sans-serif"">Thanks<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:14.0pt;font-family:"Century Gothic","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Century Gothic","sans-serif"">Dana Orzel<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Century Gothic","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Century Gothic","sans-serif"">Great Solar Works, Inc<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Century Gothic","sans-serif"">E - <a href="mailto:dana@solarwork.com">
dana@solarwork.com</a> <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Century Gothic","sans-serif"">V - 970.626.5253<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Century Gothic","sans-serif"">F - 970.626.4140<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Century Gothic","sans-serif"">C - 970.209.4076<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Century Gothic","sans-serif"">web -
<a href="http://www.solarwork.com">www.solarwork.com</a> <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Century Gothic","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Century Gothic","sans-serif"">"Responsible Technologies for Responsible People since 1988"</span><span style="font-size:11.0pt;font-family:"Century Gothic","sans-serif""><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:14.0pt;font-family:"Century Gothic","sans-serif""><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> re-wrenches-bounces@lists.re-wrenches.org [mailto:re-wrenches-bounces@lists.re-wrenches.org]
<b>On Behalf Of </b>john<br>
<b>Sent:</b> Wednesday, February 15, 2012 9:18 PM<br>
<b>To:</b> re-wrenches@lists.re-wrenches.org<br>
<b>Subject:</b> Re: [RE-wrenches] wrenches] Interstate L-16 vs Trojan L-16REB<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black">William,<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black"> Back to the original question you posed. I have had good luck with Interstate L-16 batteries (so far). My first ones were installed in 2005 so I am just at
the 7 year mark. I just looked some today and they are now failing at 7 years... one string of 4 real strong and the other 3 strings showing a weak battery in each. This system has been heavily abused with deep cycling due to generator problems and undersized
PV array (and large loads). This was the system installed in a shed to power construction of a "modest" house that turned into a 3 story 5000 sf house and 3000 sf barn with 1200 watts of PV. I added another 1600 watts and now will be adding more along with
new batteries. I have had lots of problems with the Trojan L16 HC's. Virtually all that I sold (may 5 or 6 systems) had premature failures. (1 to 3 years). I have seen comparable results with the Interstate L16 and the standard Trojan L16, but the interstates
were considerably less expensive. I also have an Interstate supplier one block from my shop so convenience is part of the plus. I have had a few with leaking cell tops but was able to get instant replacements at no charge. On the question of grid tie,
I had a set of 24 Trojan L16's last 12 years with one cycle per month performed by the owner. Off grid, however, around 7 years seems to be the norm.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black"> <o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black">John<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black">-----Original Message-----<br>
From: William Miller <william@millersolar.com><br>
To: RE-wrenches <re-wrenches@lists.re-wrenches.org><br>
Sent: Tue, Feb 14, 2012 3:45 pm<br>
Subject: [RE-wrenches] Interstate L-16 vs Trojan L-16REB<o:p></o:p></span></p>
<div id="AOLMsgPart_0_bb8ff954-459e-460f-ac8e-b3a4407b72e8">
<pre style="background:white"><tt><span style="color:black">Colleagues:</span><o:p></o:p></tt></pre>
<pre style="background:white"><tt><span style="color:black"><o:p> </o:p></span></tt></pre>
<pre style="background:white"><tt><span style="color:black">Do any of you have experience with Interstate L-16 batteries? Are they a <o:p></o:p></span></tt></pre>
<pre style="background:white"><tt><span style="color:black">good value?<o:p></o:p></span></tt></pre>
<pre style="background:white"><tt><span style="color:black"><o:p> </o:p></span></tt></pre>
<pre style="background:white"><tt><span style="color:black">Thanks in advance,<o:p></o:p></span></tt></pre>
<pre style="background:white"><tt><span style="color:black"><o:p> </o:p></span></tt></pre>
<pre style="background:white"><tt><span style="color:black">William Miller<o:p></o:p></span></tt></pre>
<pre style="background:white"><tt><span style="color:black"><o:p> </o:p></span></tt></pre>
<pre style="background:white"><tt><span style="color:black">Miller Solar<o:p></o:p></span></tt></pre>
<pre style="background:white"><tt><span style="color:black">Voice :805-438-5600<o:p></o:p></span></tt></pre>
<pre style="background:white"><tt><span style="color:black">email: <a href="mailto:william@millersolar.com">william@millersolar.com</a><o:p></o:p></span></tt></pre>
<pre style="background:white"><tt><span style="color:black"><a href="http://millersolar.com/" target="_blank">http://millersolar.com</a><o:p></o:p></span></tt></pre>
<pre style="background:white"><tt><span style="color:black">License No. C-10-773985<o:p></o:p></span></tt></pre>
<pre style="background:white"><tt><span style="color:black"><o:p> </o:p></span></tt></pre>
<pre style="background:white"><tt><span style="color:black">_______________________________________________<o:p></o:p></span></tt></pre>
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