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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">Hi Mac,
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">So essentially this unfortunate battery bank was being close to Equalize charged daily for a couple years? Must have gone through a
lot of water. I agree with your diagnosis they just cooked them, plates are dissolving = a seriously over-charged and ruined battery bank. Hopefully she doesn't shoot the messenger when you sell a new bank. Only times I would use settings like that is if using
PV to recondition some batteries that suffered an opposite fate to this situation of chronic discharge. Even then would only be a couple weeks.
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">I like the saying ' batteries don't die, they are murdered ' .
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">Kevin<o:p></o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif"> RE-wrenches [mailto:re-wrenches-bounces@lists.re-wrenches.org]
<b>On Behalf Of </b>Mac Lewis<br>
<b>Sent:</b> September-11-18 5:44 PM<br>
<b>To:</b> RE-wrenches <re-wrenches@lists.re-wrenches.org><br>
<b>Subject:</b> [RE-wrenches] Trojan L16RE-2V set-points<o:p></o:p></span></p>
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<p class="MsoNormal">Hello wrenches,<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">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.<o:p></o:p></p>
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<p class="MsoNormal">The system was dual stack Outback VFXR-3524A inverters (to be precise one was a sealed unit). The set-points were as follows:<o:p></o:p></p>
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<p class="MsoNormal">Absorb Voltage was 29.8V<o:p></o:p></p>
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<p class="MsoNormal">Absorb Time was 6.0 hours<o:p></o:p></p>
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<p class="MsoNormal">Float Voltage was 27.0V<o:p></o:p></p>
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<p class="MsoNormal">Rebulk Voltage was 27.0V<o:p></o:p></p>
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<p class="MsoNormal">End Amps was 0A<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">These settings extended similarly to 2 x FM80 charge controllers.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">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!<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">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. <o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">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.<o:p></o:p></p>
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<p class="MsoNormal">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.<o:p></o:p></p>
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<p class="MsoNormal">Thanks in advance<o:p></o:p></p>
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<p class="MsoNormal">-- <o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">Mac Lewis<b><span style="font-family:"Arial",sans-serif;color:#FF9900"><o:p></o:p></span></b></p>
<p><span style="color:#305A78">"Yo solo sé que no sé nada." </span><b><span style="color:#686868">-Sócrates</span></b><b><span style="font-family:"Arial",sans-serif;color:#FF9900"><o:p></o:p></span></b></p>
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