<font face="arial" size="3"><p style="margin:0;padding:0;">this is probably a hair brained question, but has anyone ever tried paralleling the connections within the series strings?</p>
<p style="margin:0;padding:0;">yes, more cables, but might this reduce the multiple parallel string unbalancing issues?</p>
<p style="margin:0;padding:0;"> </p>
<p style="margin:0;padding:0;">todd</p>
<p style="margin:0;padding:0;"> </p>
<p style="margin:0;padding:0;"> </p>
<p style="margin:0;padding:0;"> </p>
<p style="margin:0;padding:0;">On Monday, April 29, 2013 3:53pm, "Wayne Irwin" <wayne@pureenergysolar.com> said:<br /><br /></p>
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<div dir="ltr"><br id="FontBreak" /><span style="font-size: 10pt;">The syste<span style="font-size: 10pt;">m is pre-existing. <span style="font-size: 10pt;"><span style="font-size: 10pt;">This is <span style="font-size: 10pt;">a </span><span style="font-size: 10pt;">b</span></span>attery replacement only. I agree th<span style="font-size: 10pt;">at fewer strings are best. <span style="font-size: 10pt;"><span style="font-size: 10pt;">T</span>he<span style="font-size: 10pt;"> 8CS25<span style="font-size: 10pt;"> were the most AH for the mo<span style="font-size: 10pt;">n<span style="font-size: 10pt;">ey.</span></span> </span></span></span></span></span></span></span><span style="font-size: 10pt;"><span style="font-size: 10pt;"><span style="font-size: 10pt;"><span style="font-size: 10pt;"><span style="font-size: 10pt;">However,</span> <span style="font-size: 10pt;">t</span>he 12 <span style="font-size: 10pt;">- <span style="font-size: 10pt;">8CS 25's is a big step up from the <span style="text-decoration: underline;"><strong>32</strong></span><span style="font-size: 10pt;"> - </span>S530's (8 strings! and 96 holes to fill)<span style="font-size: 10pt;">.<br /><span style="font-size: 10pt;"><span style="font-size: 10pt;"><span style="font-size: 10pt;">F<span style="font-size: 10pt;">Y</span>I. As a case study,</span> t<span style="font-size: 10pt;">he S530 bank w<span style="font-size: 10pt;">as 6yrs old before showing sign<span style="font-size: 10pt;">s of</span><span style="font-size: 10pt;"> weakening and </span></span></span></span></span></span></span></span></span></span></span></span><span style="font-size: 10pt;"><span style="font-size: 10pt;"><span style="font-size: 10pt;"><span style="font-size: 10pt;"><span style="font-size: 10pt;"><span style="font-size: 10pt;"><span style="font-size: 10pt;"><span style="font-size: 10pt;"><span style="font-size: 10pt;"><span style="font-size: 10pt;"><span style="font-size: 10pt;"><span style="font-size: 10pt;"><span style="font-size: 10pt;"><span style="font-size: 10pt;"><span style="font-size: 10pt;"><span style="font-size: 10pt;"><span style="font-size: 10pt;"><span style="font-size: 10pt;"><span style="font-size: 10pt;"><span style="font-size: 10pt;"><span style="font-size: 10pt;"><span style="font-size: 10pt;"><span style="font-size: 10pt;"><span style="font-size: 10pt;"><span style="font-size: 10pt;"><span style="font-size: 10pt;"><span style="font-size: 10pt;"><span style="font-size: 10pt;"><span style="font-size: 10pt;"><span style="font-size: 10pt;">could probably keep going <span style="font-size: 10pt;">at<span style="font-size: 10pt;"> least <span style="font-size: 10pt;">until warran<span style="font-size: 10pt;">ty exp. <span style="font-size: 10pt;">Jan. 20</span>14.</span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span> <span style="font-size: 10pt;">C</span>able's and terminals were p<span style="font-size: 10pt;">retty clean<span style="font-size: 10pt;">, w<span style="font-size: 10pt;">ater<span style="font-size: 10pt;">ed and eq'<span style="font-size: 10pt;">d<span style="font-size: 10pt;"> regularly.</span></span></span></span></span></span><br /><br /><span style="font-size: 10pt;">The 5<span style="font-size: 10pt;"> - </span>CC design objective was to <span style="font-size: 10pt;">maximize <span style="font-size: 10pt;">efficiency and provide <span style="font-size: 10pt;">redundancy</span>.</span><span style="font-size: 10pt;"><span style="font-size: 10pt;"> <br /><span style="font-size: 10pt;">System <span style="font-size: 10pt;">s</span>eems to<span style="font-size: 10pt;"> <span style="font-size: 10pt;">have worked</span></span> flawlessly for past 6 yrs. <span style="font-size: 10pt;"><span style="font-size: 10pt;"><span style="font-size: 10pt;"><span style="font-size: 10pt;">.</span></span></span></span><span style="font-size: 10pt;"><span style="font-size: 10pt;"><br />Supports a </span><span style="font-size: 10pt;"><span style="font-size: 10pt;">3<span style="font-size: 10pt;">5</span>00sq' Res/Farm</span> <span style="font-size: 10pt;">with 1h<span style="font-size: 10pt;">p well p<span style="font-size: 10pt;">ump for irrigation<span style="font-size: 10pt;">, A</span></span></span></span></span>C throughout home, pool, etc...</span></span></span></span></span></span><br /><br /><br /><span style="font-size: 10pt; color: #76923c;">Wayne Irwin</span><span style="font-size: 10pt; color: #76923c;">,<br /></span><span style="font-size: 10pt; color: #76923c;">President</span><br /><span style="font-size: 10pt; color: #76923c;">License #CVC56695 </span><span style="font-size: 10pt; color: #76923c;"><br /></span><span style="font-size: 10pt; color: #76923c;">State Licensed Solar Contractor</span><br /><span style="font-size: 10pt; color: #76923c;">Pure Energy Solar International Inc. </span><span style="font-size: 10pt; color: #76923c;"><br /></span><span style="font-size: 10pt; color: #76923c;"> </span><span style="font-size: 10pt; color: #76923c;"><a href="mailto:PureEnergySolar@hotmail.com">Wayne@PureEnergySolar.com</a></span><span style="font-size: 10pt; color: #76923c;"> </span><span style="font-size: 10pt; color: #76923c;"><br /></span><span style="font-size: 10pt; color: #76923c;"> </span><span style="font-size: 10pt; color: #76923c;"><a href="http://pureenergysolar.net/" target="_blank">http://PureEnergySolar.com</a></span><span style="font-size: 10pt; color: #76923c;"> </span><span style="font-size: 10pt; color: #76923c;"><br /></span><span style="font-size: 10pt; color: #76923c;"> </span><span style="font-size: 10pt; color: #76923c;">352 377-6527 Office</span><span style="font-size: 10pt; color: #76923c;"><br /></span><span style="font-size: 10pt; color: #76923c;">352 336-3299 Fax</span><span style="font-size: 10pt; color: #76923c;"><br /></span><span style="font-size: 10pt; color: #76923c;">352 316-1637 Cell</span><span style="font-size: 10pt; color: #76923c;"><br /><br /></span>
<p class="ecxecxecxEC_EC_EC_EC_EC_MsoNormal" style="margin:0;padding:0;"><span style="font-size: 10pt; color: #76923c;"><span style="font-family: 'Arial','sans-serif';">The content of this message is Pure Energy Solar Confidential. If you are not the intended recipient and have received this message in error, any use or distribution is prohibited. Please notify me immediately by reply e-mail and delete this message from your computer system. Thank you.</span></span></p>
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From: bob-o@electronconnection.com<br />Date: Mon, 29 Apr 2013 14:37:50 -0700<br />To: re-wrenches@lists.re-wrenches.org<br />Subject: Re: [RE-wrenches] 24V Rolls Charging Parameters?<br /><br />Wayne,
<div>In the first place, 4 parallel strings of anything is a very bad idea. Micro resistances in cabling and connections plus eddy currents and the like will, over time, inherently unbalance the pack. Doing frequent EQ charges will be required but will not overcome the inherently bad design of too many parallel strings. If you want to stay with Surrette, one string of 24 2-YS-31PS will give you about the same capacity in one tasty, electrically happy string. Lots more money, I get that, but that would be the ideal situation. As a fallback, do yourself a favor and spec out 12 of the 4KS-21PS so that you have just two parallel strings. Should even be a little less dough.</div>
<div>Jamie Surette (<a href="mailto:james@surrette.com">james@surrette.com</a>) is usually pretty good at returning emails and calls. His would be, without doubt, your best opinion as to a proper charge regime for his batts.</div>
<div>Good Luck. If you go with four strings, you'll need it.</div>
<div>bob-O</div>
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<div>On Apr 29, 2013, at 2:15 PM, Wayne Irwin wrote:</div>
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<div dir="ltr"><span style="font-size: 10pt;">Hello Wrenches,<br /><br /><span style="font-size: 10pt;">Please provide yo<span style="font-size: 10pt;">ur<span style="font-size: 10pt;"><span class="ecx"> </span></span>opinions on the proper<span class="ecx"> </span><span style="font-size: 10pt;">char<span style="font-size: 10pt;">ging</span></span></span></span></span><span style="font-size: 10pt;"><span style="font-size: 10pt;"><span style="font-size: 10pt;"><span style="font-size: 10pt;"><span style="font-size: 10pt;"><span style="font-size: 10pt;"><span style="font-size: 10pt;"><span style="font-size: 10pt;"><span style="font-size: 10pt;"><span style="font-size: 10pt;"><span style="font-size: 10pt;"><span style="font-size: 10pt;"><span style="font-size: 10pt;"><span class="ecx"> </span>voltages</span></span></span></span></span></span></span><span class="ecx"> </span></span>(e.g. bulk<span style="font-size: 10pt;">, float, eq<span style="font-size: 10pt;">,<span style="font-size: 10pt;">),</span><span style="font-size: 10pt;"><span class="ecx"> </span>and recommended duration<span style="font-size: 10pt;">s<span style="font-size: 10pt;">.</span><br /><br /><span style="font-size: 10pt;">The bank consists of 12 - Rolls 8CS25P (820AH @ 20hr rate) (4 strings of 3). Design<span style="font-size: 10pt;"><span class="ecx"> </span>based partly on budget limitations<span style="font-size: 10pt;">.</span></span><br /><span style="font-size: 10pt;"><br />FYI<span style="font-size: 10pt;">.<span class="ecx"> </span></span>The system<span style="font-size: 10pt;"><span class="ecx"> </span>is off grid and<span class="ecx"> </span><span style="font-size: 10pt;">con<span style="font-size: 10pt;">s<span style="font-size: 10pt;">ists of an<span class="ecx"> </span><span style="font-size: 10pt;">8KW array,</span><span class="ecx"> </span>2<span style="font-size: 10pt;"><span class="ecx"> </span>- OB VFX 3524 I<span style="font-size: 10pt;">nv's.<span class="ecx"> </span></span>an<span style="font-size: 10pt;">d 5 - OB MX<span style="font-size: 10pt;">80 CC's.</span></span></span></span></span></span></span></span><br /><br /><span style="font-size: 10pt;"><span style="font-size: 10pt;">I have gener<span style="font-size: 10pt;">al parameters<span class="ecx"> </span><span style="font-size: 10pt;">programmed based on AH's but woul<span style="font-size: 10pt;">d like to<span style="font-size: 10pt;"><span class="ecx"> </span>have addition<span style="font-size: 10pt;">al opinions/suggestions to<span class="ecx"> </span><span style="font-size: 10pt;">compare and<span style="font-size: 10pt;">/or see if there is<span class="ecx"> </span><span style="font-size: 10pt;">something that I have missed</span></span></span>.<br /><br />I have not yet<span class="ecx"> </span><span style="font-size: 10pt;">received</span><span class="ecx"> </span>any feedback from Rolls t<span style="font-size: 10pt;">ech support ..... James?</span><br /><br /><span style="font-size: 10pt;">Thanks in advance<span style="font-size: 10pt;"><span class="ecx"> </span>for your help,</span></span><br id="ecxFontBreak" /></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span><br /><br /><span style="font-size: 10pt; color: #76923c;">Wayne Irwin</span><span style="font-size: 10pt; color: #76923c;">,<br /></span><span style="font-size: 10pt; color: #76923c;">President</span><br /><span style="font-size: 10pt; color: #76923c;">License #CVC56695<span class="ecx"> </span></span><span style="font-size: 10pt; color: #76923c;"><br /></span><span style="font-size: 10pt; color: #76923c;">State Licensed Solar Contractor</span><br /><span style="font-size: 10pt; color: #76923c;">Pure Energy Solar International Inc.<span class="ecx"> </span></span><span style="font-size: 10pt; color: #76923c;"><br /></span><span style="font-size: 10pt; color: #76923c;"> </span><span style="font-size: 10pt; color: #76923c;"><a href="mailto:PureEnergySolar@hotmail.com">Wayne@PureEnergySolar.com</a></span><span style="font-size: 10pt; color: #76923c;"><span class="ecx"> </span></span><span style="font-size: 10pt; color: #76923c;"><br /></span><span style="font-size: 10pt; color: #76923c;"> </span><span style="font-size: 10pt; color: #76923c;"><a href="http://pureenergysolar.net/" target="_blank">http://PureEnergySolar.com</a></span><span style="font-size: 10pt; color: #76923c;"><span class="ecx"> </span></span><span style="font-size: 10pt; color: #76923c;"><br /></span><span style="font-size: 10pt; color: #76923c;"> </span><span style="font-size: 10pt; color: #76923c;">352 377-6527 Office</span><span style="font-size: 10pt; color: #76923c;"><br /></span><span style="font-size: 10pt; color: #76923c;">352 336-3299 Fax</span><span style="font-size: 10pt; color: #76923c;"><br /></span><span style="font-size: 10pt; color: #76923c;"><br /><br /></span>
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