<div dir="auto">When the return amps are set to 0, that typically defeats that function.<div dir="auto">Howie</div></div><br><div class="gmail_quote"><div dir="ltr">On Tue, Sep 11, 2018, 10:07 PM Dana <<a href="mailto:dana@solarwork.com">dana@solarwork.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div lang="EN-US" link="blue" vlink="purple"><div class="m_5574956143692895937WordSection1"><p class="MsoNormal"><span style="font-size:14.0pt;font-family:"Century Gothic",sans-serif;color:black">Return amps at 0 is physically impossible I think. The lowest Return amps I have ever seen acknowledged by a charge controller on a 24-volt set was 3-4 amps on a new set of batteries. Older sets 6-8 amps.<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:14.0pt;font-family:"Century Gothic",sans-serif;color:black">I was trying to see how low you could go before it would stop Bulk.<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:14.0pt;font-family:"Century Gothic",sans-serif;color:black">29.8 for 6 hours? was cooking them plates& boiling off electrolyte. These batteries must have been so hot.<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:14.0pt;font-family:"Century Gothic",sans-serif;color:black">To Float my 48-volt HUP set takes about 250-300 watts with no load. 5.21-6.25 amps.<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:14.0pt;font-family:"Century Gothic",sans-serif;color:black"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-family:"Century Gothic",sans-serif;color:#002060">----------------------------------------------------------------------------<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Century Gothic",sans-serif;color:black">Dana Orzel Great Solar Works, Inc.</span><span style="font-size:9.0pt;font-family:"Century Gothic",sans-serif;color:black"> </span><span style="font-size:10.0pt;font-family:"Century Gothic",sans-serif;color:black"><u></u><u></u></span></p><p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Century Gothic",sans-serif;color:black">C - 208.721.7003 <a href="mailto:dana@solarwork.com" target="_blank" rel="noreferrer">dana@solarwork.com</a><u></u><u></u></span></b></p><p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Century Gothic",sans-serif;color:black">Idaho Contractor - # 028765 Idaho PV # 028374<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Century Gothic",sans-serif;color:black">NABCEP # 051112-136 <a href="http://www.solarwork.biz" target="_blank" rel="noreferrer">www.solarwork.biz</a><u></u><u></u></span></p><p class="MsoNormal"><u><span style="font-size:9.0pt;font-family:"Century Gothic",sans-serif;color:black">"Responsible Technologies for Responsible People since 1988" </span></u><u><span style="font-size:9.0pt;font-family:"Century Gothic",sans-serif;color:black"><u></u><u></u></span></u></p><p class="MsoNormal" style="background:white"><b><span style="font-size:18.0pt;font-family:Webdings;color:green">P</span></b><span style="font-family:"Helvetica",sans-serif;color:navy"> </span><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:green">Please consider the environment before printing this email.</span><span style="font-family:"Helvetica",sans-serif;color:black"><u></u><u></u></span></p><p class="MsoNormal"><span style="color:black"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:14.0pt;font-family:"Century Gothic",sans-serif;color:black"><u></u> <u></u></span></p><p class="MsoNormal" style="margin-left:.5in"><b>From:</b> RE-wrenches <<a href="mailto:re-wrenches-bounces@lists.re-wrenches.org" target="_blank" rel="noreferrer">re-wrenches-bounces@lists.re-wrenches.org</a>> <b>On Behalf Of </b>Mac Lewis<br><b>Sent:</b> Tuesday, September 11, 2018 6:44 PM<br><b>To:</b> RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org" target="_blank" rel="noreferrer">re-wrenches@lists.re-wrenches.org</a>><br><b>Subject:</b> [RE-wrenches] Trojan L16RE-2V set-points<u></u><u></u></p><p class="MsoNormal" style="margin-left:.5in"><u></u> <u></u></p><div><p class="MsoNormal" style="margin-left:.5in">Hello wrenches,<u></u><u></u></p><div><p class="MsoNormal" style="margin-left:.5in"><u></u> <u></u></p></div><div><p class="MsoNormal" style="margin-left:.5in">I inspected a system that another company had installed. It had single string of 12 x Trojan L16RE-2V batteries about 2 years old. They had experienced a battery melt-down. It looks as though the meltdown had occurred internally, not from a bad connection.<u></u><u></u></p></div><div><p class="MsoNormal" style="margin-left:.5in"><u></u> <u></u></p></div><div><p class="MsoNormal" style="margin-left:.5in">The system was dual stack Outback VFXR-3524A inverters (to be precise one was a sealed unit). The set-points were as follows:<u></u><u></u></p></div><div><p class="MsoNormal" style="margin-left:.5in">Absorb Voltage was 29.8V<u></u><u></u></p></div><div><p class="MsoNormal" style="margin-left:.5in">Absorb Time was 6.0 hours<u></u><u></u></p></div><div><p class="MsoNormal" style="margin-left:.5in">Float Voltage was 27.0V<u></u><u></u></p></div><div><p class="MsoNormal" style="margin-left:.5in">Rebulk Voltage was 27.0V<u></u><u></u></p></div><div><p class="MsoNormal" style="margin-left:.5in">End Amps was 0A<u></u><u></u></p></div><div><p class="MsoNormal" style="margin-left:.5in"><u></u> <u></u></p></div><div><p class="MsoNormal" style="margin-left:.5in">These settings extended similarly to 2 x FM80 charge controllers.<u></u><u></u></p></div><div><p class="MsoNormal" style="margin-left:.5in"><u></u> <u></u></p></div><div><p class="MsoNormal" style="margin-left:.5in">I was able to jumper the melted battery and get her power in 15 minutes. Her installer had left her without power for 2 weeks. My clients will kill me if that happened!<u></u><u></u></p></div><div><p class="MsoNormal" style="margin-left:.5in"><u></u> <u></u></p></div><div><p class="MsoNormal" style="margin-left:.5in">Anyway, I believe these set-points are way out of whack and too aggressive. The voltage is OK (Trojan recommends ~29.6V for this) but the Absorb time seems way too long, Rebulk is too high and end amps isn't helping. However, Im not finding a definitive article from Trojan that describes typical Absorb times or even how to adjust towards a good Absorb Time, based on specific gravity measurements or amperage absorption. <u></u><u></u></p></div><div><p class="MsoNormal" style="margin-left:.5in"><u></u> <u></u></p></div><div><p class="MsoNormal" style="margin-left:.5in">My diagnosis is that these batteries have been cooked over the past 2 years. In the electrolyte, there is noticeable "floaties". The client said that the original installer had accused her of not using distilled water, but I don't believe that would cause her symptoms. I believe the floaties are plate material.<u></u><u></u></p></div><div><p class="MsoNormal" style="margin-left:.5in"><u></u> <u></u></p></div><div><p class="MsoNormal" style="margin-left:.5in">I'd be interested in wrenches opinions familiar with these batteries if these are appropriate settings for a low energy user. I will attempt to get through to Trojan as well.<u></u><u></u></p></div><div><p class="MsoNormal" style="margin-left:.5in"><u></u> <u></u></p></div><div><p class="MsoNormal" style="margin-left:.5in">Thanks in advance<u></u><u></u></p></div><div><p class="MsoNormal" style="margin-left:.5in"><u></u> <u></u></p></div><div><p class="MsoNormal" style="margin-left:.5in"><br clear="all"><u></u><u></u></p><div><p class="MsoNormal" style="margin-left:.5in"><u></u> <u></u></p></div><p class="MsoNormal" style="margin-left:.5in">-- <u></u><u></u></p><div><div><p class="MsoNormal" style="margin-left:.5in"><u></u> <u></u></p></div><div><p class="MsoNormal" style="margin-left:.5in"><u></u> <u></u></p></div><div><p class="MsoNormal" style="margin-left:.5in"><u></u> <u></u></p></div><p class="MsoNormal" style="margin-right:0in;margin-bottom:12.0pt;margin-left:.5in">Mac Lewis<b><span style="font-size:12.0pt;font-family:"Arial",sans-serif;color:#ff9900"><u></u><u></u></span></b></p><p style="margin-left:.5in"><span style="font-size:12.0pt;font-family:"Times New Roman",serif;color:#305a78">"Yo solo sé que no sé nada." </span><b><span style="font-size:12.0pt;font-family:"Times New Roman",serif;color:#686868">-Sócrates</span></b><b><span style="font-size:12.0pt;font-family:"Arial",sans-serif;color:#ff9900"><u></u><u></u></span></b></p></div></div></div></div></div>_______________________________________________<br>
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