Sharp modules [RE-wrenches]

[Kurt Nelson]

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Christopher -- and there is no problem with a 24 volt battery and 72
volt array except perhaps a little bit of conversion efficiency over a
48 volt battery?

Kurt

-----Original Message-----
From: Christopher Freitas --- OutBack Power
[mailto:cfreitas at outbackpower.com] 
Sent: Thursday, March 03, 2005 2:52 PM
To: RE-wrenches at topica.com
Subject: RE: Sharp modules [RE-wrenches]

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Wrenches,  

There actually isn't any fundamental issue with using 12vdc battery 
system with 72vdc PV arrays and the MX60 - the issue with recommending 
it is that we have seen the majority of failures with 12 vdc batteries 
and 72 vdc high voltage PV arrays than with any other configuration.  

The problem appears to be related to some variability in the production 
of MX60s that makes some units "on the edge" when used in  this 
configuration.  We have made some changes in production and we  think 
this issue has been resolved - but if you can use a 48 vdc PV array 
instead of 72vdc PV array than you may experience less issues. 

Either way, you will get full warranty coverage on using them with 12vdc

batteries and 72 vdc PV arrays.  Some times going with the higher 
voltage PV array configuration makes a big difference in the install 
cost and time - if so, then go ahead with it - we will support it.  

Christopher

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