<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div apple-content-edited="true"><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: 'Lucida Sans'; font-size: 14px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><span class="Apple-style-span" style="font-family: Helvetica; font-size: 12px; "><div><div><span class="Apple-style-span" style="font-size: medium;">Hey Chris,</span></div><div><span class="Apple-style-span" style="font-size: medium;"><br></span></div><div><span class="Apple-style-span" style="font-size: medium;">A few years ago I built a pulser circuit the produces a 35 Vp-p spike at 1 kHz. I have used it a quite a few times to recover abused batteries. Usually newer batteries that have been chronically undercharged, both AGM and flooded. My restore method is use a high voltage charge (up to 2.5V per cell @ 77 degrees) with the pulser connected for few weeks watching the current first rise then drop. Then I do a constant current equalization with no voltage limit, just watch the temperature, until the current drops to 1.5A per 100AH capacity for flooded or 0.7A per 100AH for AGM. I have put quite a few batteries back in service. When a battery is still connected to the inverter, the spike is filtered down quite a lot but still present. I'm not sure how effective it would be just putting one in a system.</span></div><div><span class="Apple-style-span" style="font-size: medium;"> </span></div><div><span class="Apple-style-span" style="font-size: medium;">A commercial manufacturer came by our retail store last winter wanting me to carry their charge and pulser products. I put one on the bench with the rep watching and could not see any pulse on the scope, just lots of ripple that I could not lock onto. I grabbed my pulser to show him what I was looking for. The rep could not explain it why theirs did not do the same. I suppose there could be several desulfator designs out there. I have not tested any others.</span></div><div><span class="Apple-style-span" style="font-size: medium;"><br></span></div><div>Larry Crutcher</div><div>Starlight Solar</div><div>(928) 941-1660</div><div>Renewable Energy Products, Service and Installation</div><div><br></div><div><span class="Apple-style-span" style="font-family: 'Lucida Sans'; font-size: medium; ">On Jun 18, 2009, at 7:12 PM, Chris Daum wrote:</span></div></div></span></div></div></div></div></div></div></span></div><div><br class="Apple-interchange-newline"><blockquote type="cite"> <div text="#000000" bgcolor="#ffffff"><span style="FONT-SIZE: 12pt"> <div dir="ltr" align="left"><br><span class="881161002-19062009"><font face="Verdana">Dear folks:</font></span></div> <div dir="ltr" align="left"><span class="881161002-19062009"><font face="Verdana"></font></span> </div> <div dir="ltr" align="left"><span class="881161002-19062009"><font face="Verdana">What is y'all's opinions on desulfators? I have a customer who is having to do a battery upgrade, and someone's stuck a bug in her ear about them. I figure proper battery care is most essential, but I am interested in hearing about your experiences.</font></span></div> <div dir="ltr" align="left"><span class="881161002-19062009"><font face="Verdana"></font></span> </div> <div dir="ltr" align="left"><span class="881161002-19062009"><font face="Verdana">Thanks so much for your information!</font></span></div> <div dir="ltr" align="left"><span class="881161002-19062009"><font face="Verdana"></font></span> </div> <div dir="ltr" align="left"><span class="881161002-19062009"><font face="Verdana">Chris Daum</font></span></div> <div dir="ltr" align="left"><span class="881161002-19062009"><font face="Verdana">Oasis Montana Inc.</font></span></div> <div dir="ltr" align="left"><span class="881161002-19062009"><font face="Verdana"></font></span> </div></span></div> _______________________________________________<br>List sponsored by Home Power magazine<br><br>List Address: <a href="mailto:RE-wrenches@lists.re-wrenches.org">RE-wrenches@lists.re-wrenches.org</a><br><br>Options & settings:<br><a href="http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org">http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org</a><br><br>List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org<br><br>List rules & etiquette:<br>www.re-wrenches.org/etiquette.htm<br><br>Check out participant bios:<br>www.members.re-wrenches.org<br><br></blockquote></div><br></body></html>