<div dir="ltr">Steve,<div><br></div><div>Can you elaborate on how heat affects batteries that sit in float service at high temperatures? What kind of cycle/capacity changes can we expect? Say, for example, that a bank of S-530 batteries are 5 years old and have spent days at 40C and nights at 25C, and have essentially been in float service except for a couple dozen cycles to 50% over the years. If these batteries are now put into regular daily cycles at the same temperatures, would they act much differently than batteries that were stored at a constant 25C?</div><div><br></div><div>I guess my question boils down to whether cycling during high temperatures is more damaging than just being "stored" at high temperatures.</div><div><br></div><div>Thanks,</div><div><br></div><div>Jason</div><div class="gmail_extra"><br clear="all"><div><div class="gmail_signature"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><span><br><div dir="ltr" style="margin-left:0pt"><br></div></span></div></div></div></div></div></div></div></div>
<br><div class="gmail_quote">On Mon, May 25, 2015 at 1:14 PM, Steve Higgins <span dir="ltr"><<a href="mailto:steve@surrette.com" target="_blank">steve@surrette.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Typically you want the BTS installed and any and every case… The BTS should be installed below the level of the plates not on the top of the battery. To
do this you need to have the BTS about 1/3 to ½ the way down the side (Single Wall) of the battery, and I would suggest running some duct tape around the battery on the sensor to keep it on the side of the battery.
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">For a Double wall battery, Although the sensor will be close, it will get better readings in between the plastic walls. To do so you can pull the top off the
battery and put it between the walls. There is usually some black silicone around the pos/neg terminals, all you need to do is replace that with regular old RTV silicone…
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Post mounts are okay, but Surrette prefers the side mounts with another method of securing the sensors… The post mounts only sense the plate temp, not the
overall temp of the battery. <u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Temperature is a killer, and my years at Outback, and Trace I had no idea of how damaging this was until I came to work for Surrette.
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">For every 10 Degrees C above 25 you lose 50% of your life cycles… For example if you installed these in the Mojave desert where six month of the year they would
reach 95F+ you would probably lose about 25-30% of your life cycles… One of the ways to combat this if you can is vault them…it’s a lot of work, but the earth even in those environments will keep them cooler.
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<p><font style="FONT-SIZE:14pt" face="Tahoma"><strong>Steve Higgins<br>
<font style="FONT-SIZE:12pt">Technical Services Manager</font><br>
</strong></font><font face="Tahoma"><strong></strong></font><font face="Tahoma">P: <a href="tel:%2B1.902.597.4020" value="+19025974020" target="_blank">+1.902.597.4020</a><br>
</font><font face="Tahoma">M: <a href="tel:%2B1.206.790.5840" value="+12067905840" target="_blank">+1.206.790.5840</a><br>
</font><font face="Tahoma">F: <a href="tel:%2B1.902.597.8447" value="+19025978447" target="_blank">+1.902.597.8447</a><br>
</font><font color="#ff0000" face="Tahoma"><strong><font color="#d30000">Surrette Battery Company</font><br>
</strong></font><font style="FONT-SIZE:10pt" face="Tahoma">Exclusive manufacturer of<br>
<a href="http://www.rollsbattery.com" target="_blank"><img border="0" hspace="0" src="cid:rollsafb380"></a></font></p>
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<p class="MsoNormal" style="margin-left:.5in"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext"> RE-wrenches [mailto:<a href="mailto:re-wrenches-bounces@lists.re-wrenches.org" target="_blank">re-wrenches-bounces@lists.re-wrenches.org</a>]
<b>On Behalf Of </b>Ray Walters<br>
<b>Sent:</b> Saturday, May 23, 2015 8:05 PM<br>
<b>To:</b> RE-wrenches<span class=""><br>
<b>Subject:</b> Re: [RE-wrenches] FLA battery setpoints with larger arrays<u></u><u></u></span></span></p>
</div>
</div>
<p class="MsoNormal" style="margin-left:.5in"><u></u> <u></u></p>
<p class="MsoNormal" style="margin-left:.5in">Having the LVD be temperature compensated so that the load is always disconnected above the freeze point of the battery would be a Huge Improvement on the whole concept of LVD. In combination with State of Charge
monitoring, like the Whiz bang Jr, would be the most effective, and just program the disconnect to stay above freezing for a typical lead acid battery. I got this from a Trojan White Paper:<br>
<img width="573" height="463" src="cid:image001.jpg@01D096D3.8E8C7560"><br>
<br>
<u></u><u></u></p><div><div class="h5">
<pre style="margin-left:.5in">R.Ray Walters<u></u><u></u></pre>
<pre style="margin-left:.5in">CTO, Solarray, Inc<u></u><u></u></pre>
<pre style="margin-left:.5in">Nabcep Certified PV Installer, <u></u><u></u></pre>
<pre style="margin-left:.5in">Licensed Master Electrician<u></u><u></u></pre>
<pre style="margin-left:.5in">Solar Design Engineer<u></u><u></u></pre>
<pre style="margin-left:.5in"><a href="tel:303%20505-8760" value="+13035058760" target="_blank">303 505-8760</a><u></u><u></u></pre>
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<p class="MsoNormal" style="margin-left:.5in"><br>
FLA batteries will freeze easier if they are discharged. I suppose that you could
<br>
use the battery temp sensor to make sure you charge them up good when <br>
the temp gets cold enough. <br>
<br>
boB <u></u><u></u></p>
</div></div></div>
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