<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">I too am interested in anyone that has installed these. I had some concerns back on Nov 10, 2014. Here is a copy/past from that conversation:<div class=""><br class=""></div><div class="">Something does not add up to me. The cell has a voltage discharge curve way outside that of RE equipment, 1.75 Vpc down to 0.5Vpc. I can't see how this technology could be scaled to RE applications without wasting much of the capacity. From what I see, only about 40% could be used before LVD.</div><div class=""><span style="background-color: rgb(255, 255, 255);" class=""><br class=""></span></div><div class="">And this:</div><div class=""><span style="background-color: rgb(255, 255, 255);" class="">The Aquion battery claims their 2.4kWh, 48 volt stack operates from 59 to 30 volts. Many inverters have a LBCO of 1.75 Vpc (42 volts). Depending on voltage sag, that means about half of the capacity of the Aquion battery can't be used. Even if the outback can operate down to 1.5 Vpc, you are still not able to use the full capacity of the battery unless your load is less than 800 Watts. </span><br style="background-color: rgb(255, 255, 255);" class=""><br style="background-color: rgb(255, 255, 255);" class=""><span style="background-color: rgb(255, 255, 255);" class="">I have reviewed their technical presentation and it looks to me like the capacity simply can't be used in the off grid environment. If you can't use it, why do they rate it at 2.4kWh? BTW, the Voltage vs.Energy chart on the spec sheet does not match the first chart I posted.</span></div><div class=""><br class=""></div><div class=""><br class=""></div><div class=""><br class=""></div><div class=""><br class=""></div><div class=""><img apple-inline="yes" id="A75A6D95-E23F-4F67-8983-14D16999CA62" height="415" width="449" apple-width="yes" apple-height="yes" src="cid:part1.08050305.02000901@starlightsolar.com" class=""><br class=""><div apple-content-edited="true" class="">
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<br class=""><div><div class="">On Jan 29, 2016, at 7:30 AM, Chris Schaefer <<a href="mailto:chris@solarandwindfx.com" class="">chris@solarandwindfx.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><meta http-equiv="Content-Type" content="text/html; charset=utf-8" class=""><meta name="Generator" content="Microsoft Word 14 (filtered medium)" class=""><style class=""><!--
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</o:shapelayout></xml><![endif]--><div lang="EN-US" link="blue" vlink="purple" class=""><div class="WordSection1"><div class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D" class="">To All,<o:p class=""></o:p></span></div><div class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D" class=""> Great insight on the lithium movement. I do am looking for anyone dealing with the new Aquion batteries. I’ve got a couple of potential clients that have inquired about them. Saw them at a NABCEP training session last spring and while the idea is moving I wasn’t impressed. Perhaps it’s time to start a new thread, “Aquion batteries”.<o:p class=""></o:p></span></div><div class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D" class=""> </span></div><div class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D" class="">Thanks,<o:p class=""></o:p></span></div><div class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D" class="">Christopher<o:p class=""></o:p></span></div><div class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D" class=""> </span></div><div class=""><div style="border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in" class=""><div class="MsoNormal"><b class=""><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"" class="">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"" class=""> RE-wrenches [<a href="mailto:re-wrenches-bounces@lists.re-wrenches.org" class="">mailto:re-wrenches-bounces@lists.re-wrenches.org</a>] <b class="">On Behalf Of </b><a href="mailto:don@energysolarnow.com" class="">don@energysolarnow.com</a><br class=""><b class="">Sent:</b> Friday, 29 January, 2016 00:49<br class=""><b class="">To:</b> Dan Fink<br class=""><b class="">Cc:</b> re-wrenches@lists.re-wrenches.org<br class=""><b class="">Subject:</b> Re: [RE-wrenches] LiFePO4; WAS Availability of Powerwall Batteries<o:p class=""></o:p></span></div></div></div><div class="MsoNormal"><o:p class=""> </o:p></div><div class=""><div class="MsoNormal"><span style="font-size: 10pt; font-family: Verdana, sans-serif;" class="">Thanks for sharing your experience with these batteries, Dan.<o:p class=""></o:p></span></div></div><div class=""><div class="MsoNormal"><span style="font-size: 10pt; font-family: Verdana, sans-serif;" class="">I have similar SOC issues with an off-grid customer who has the Aquion Hybrid Ion batteries.<o:p class=""></o:p></span></div></div><div class=""><div class="MsoNormal"><span style="font-size: 10pt; font-family: Verdana, sans-serif;" class="">It has difficulty reaching full charge from solar, requiring the genny to kick on each morning even in the summer.<o:p class=""></o:p></span></div></div><div class=""><div class="MsoNormal"><span style="font-size: 10pt; font-family: Verdana, sans-serif;" class="">This is even worse in cold winter weather.<o:p class=""></o:p></span></div></div><div class=""><div class="MsoNormal"><span style="font-size: 10pt; font-family: Verdana, sans-serif;" class="">Your explanation of the change in Peukert's exponent above 80% SOC with NiFe batteries sounds like what is happening here as well. <o:p class=""></o:p></span></div></div><div class=""><div class="MsoNormal"><span style="font-size: 10pt; font-family: Verdana, sans-serif;" class="">Do you have any experience with Aquion batteries that you can share?<o:p class=""></o:p></span></div></div><div class=""><div class="MsoNormal"><span style="font-size: 10pt; font-family: Verdana, sans-serif;" class=""> </span></div></div><div class=""><div class="MsoNormal"><span style="font-size: 10pt; font-family: Verdana, sans-serif;" class="">Thanks<o:p class=""></o:p></span></div></div><div class=""><div class="MsoNormal"><span style="font-size: 10pt; font-family: Verdana, sans-serif;" class="">Don Barch <o:p class=""></o:p></span></div></div><div class=""><div class="MsoNormal"><span style="font-size: 10pt; font-family: Verdana, sans-serif;" class="">Energy Solar<o:p class=""></o:p></span></div></div><div class=""><div class="MsoNormal"><span style="font-size: 10pt; font-family: Verdana, sans-serif;" class=""><a href="mailto:don@energysolarnow.com" class="">don@energysolarnow.com</a></span></div></div></div></div></div></div><br class=""></div></body></html>