<html><head><style type="text/css"><!-- DIV {margin:0px;} --></style></head><body><div style="font-family:times new roman, new york, times, serif;font-size:12pt"><DIV>the post I responded to started with was the 72 volt nom battery pack charging off from solar. the solution involved using two chager controllers in series, charging off the array in sort of a bipolar fashion. I used this series chargers to charge a "lead Sled" 72 volt car in my dark past. The 72 volt battery would involve almost 90 volts to equalize. </DIV>
<DIV>Darryl <BR></DIV>
<DIV style="FONT-FAMILY: times new roman, new york, times, serif; FONT-SIZE: 12pt"><BR>
<DIV style="FONT-FAMILY: times new roman, new york, times, serif; FONT-SIZE: 12pt"><FONT size=2 face=Tahoma>
<HR SIZE=1>
<B><SPAN style="FONT-WEIGHT: bold">From:</SPAN></B> "toddcory@finestplanet.com" <toddcory@finestplanet.com><BR><B><SPAN style="FONT-WEIGHT: bold">To:</SPAN></B> RE-wrenches <re-wrenches@lists.re-wrenches.org><BR><B><SPAN style="FONT-WEIGHT: bold">Sent:</SPAN></B> Thu, February 10, 2011 4:42:00 PM<BR><B><SPAN style="FONT-WEIGHT: bold">Subject:</SPAN></B> Re: [RE-wrenches] questions about solar charging 72v UPS<BR></FONT><BR><FONT size=4 face=arial>I see the FM60 had a 60 volt option. Why not just use a single one at that battery setting for charging the battery bank?<BR><BR>Todd<BR><BR><BR>On Thursday, February 10, 2011 9:44am, "Darryl Thayer" <daryl_solar@yahoo.com> said:<BR><BR>
<DIV style="FONT-FAMILY: times new roman, new york, times, serif; FONT-SIZE: 12pt">
<DIV>Hi all </DIV>
<DIV>I have attached a PDF of a charging scheme using Outback FM controllers. The upper voltage 36 to 72 volt CC can not have a communication line connected, it will blow something, either the hub, or the controller as the controller floats but the communication lines are connected to the negative, and it would be 36 volts above ground. <BR></DIV>
<DIV style="FONT-FAMILY: times new roman, new york, times, serif; FONT-SIZE: 12pt"><BR> </DIV></DIV><BR></FONT><BR><BR><BR>Sent from Finest Planet WebMail.<BR></DIV></DIV></div><br>
</body></html>