Frostbite [RE-wrenches]

[John Blittersdorf, Cent. VT Solar & Wind]

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In a message dated 2/16/2006 5:28:10 P.M. Eastern Standard Time,  
allan at positiveenergysolar.com writes:

PV input  redundancy--that is, assuming there is any
winter sunlight up there to be  redundant with. Split the array, and run dual
charge controllers, so that a  single failure is unlikely to cause a lack  of
charging.



I have even entertained the idea of a vertical panel without a charge  
controller with an output low enough to never overcharge a large battery  bank.  
Having to "eat" the cost of 8 Trojan L16P's when the solar panels  got covered 
with snow or the MX60 quit... still not sure which happened first...  has led me 
also to embrace the K.I.S.S. principle. Can't have problems with a  charge 
controller if there isn't one.  The customer specifically asked me  if he should 
bring the batteries home for the winter from his camp in the  Northern 
Adirondacks.  I told him that they should be fine as there would  be adequate 
charging from 4 Sanyo 190 panels.  So I thought!!
 
John  Blittersdorf
NABCEP Certified Solar PV Installer
Central Vermont Solar  & Wind, Inc.
104 River Street
Rutland, VT  05701

802-747-0577
802-773-0924 fax
802-770-8625 cell
_www.cvsolar.com_ (http://www.cvsolar.com/) 


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