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Wrenches,<br>
For years, Direct Power has sold used GNB Absolyte II sealed
batteries, shipped in from Canada from telecom use. The batteries
have a pretty good reputation - at least, I haven't heard of short
remaining lifetimes from customers who have bought them.<br>
<br>
We have a GTWB customer who opted to use a 1690 amp-hour 24V set of
3-100A33 in a Sunny Island-based GTWB system that we are to be
installing soon. He had bought a set of these bad boys two years ago
for a different project, and has stored them with periodic charge.
We have to assume that this set is in good condition at present. The
problem is that we need a second set to make 48V, and DP&W
hasn't had them for well over a year, and has no expectation of if
or when they may get them again. <br>
<br>
Before I break this bad news to the customer, I'm doing due
diligence on his behalf. Is anyone aware of another source for these
batteries in similar condition?<br>
<br>
Second related question: I know that we should never mix new
batteries with old - that's PV101 stuff. But what about in this
case? If we added a new 24V 1690 A/hr string in series with his used
24V 1690 A/hr strin, could we expect the cells to play well
together? Would it be reasonable to predict that the entire single
48V string would perform as well as the older string?<br>
<br>
Thank you,<br>
Allan<br>
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<font face="Times New Roman, Times, serif"><b>Allan Sindelar</b></font><br>
<small><a href="mailto:Allan@positiveenergysolar.com"><font
color="#000099" face="Times New Roman, Times, serif"><u>Allan@positiveenergysolar.com</u></font></a></small><font
face="Times New Roman, Times, serif"><br>
<span style="font-size: 10pt;">NABCEP Certified Photovoltaic
Installer<br>
NABCEP Certified Technical Sales Professional<br>
New Mexico EE98J Journeyman Electrician<br>
Founder and Chief Technology Officer<br>
<b>Positive Energy, Inc.</b><br>
3209 Richards Lane (note new address)<br>
Santa Fe, New Mexico 87507<br>
<b>505 424-1112</b><br>
<a href="http://www.positiveenergysolar.com/" target="_blank"><u>www.positiveenergysolar.com</u></a><o:p></o:p></span></font>
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