NiCad Batteries [RE-wrenches]

John Blittersdorf, Cent. VT Solar & Wind cvsolar at aol.com
Sat Mar 29 18:41:11 PST 2003


I'm looking for the Nicad experts.  I have a client with 20 nicad batteries 
and a DR1524.  We can't seem to get a charge rate above 8 to 12 amps.  A 
neighbor  with the same batteries and an SW2512 unhooks one battery from each 
string to get the charging voltage down to a level the inverter can deal 
with.  Has anyone come up with a less labor intensive way to get a good 
charge into NiCads.  Also we are having a strange (I haven't documented it 
myself) situation where the battery voltage will climb rapidly up to inverter 
HVD when power is coming in from 200 watts of PV.  When the inverter is off, 
the battery voltage drops back down.  The system does not have an amp meter 
and the day we checked it out, there was no sun so we haven't done a good 
test yet.  It almost acts like the batteries are being disconnected when the 
inverter comes on....???  We checked all the battery cables and connections 
throughout... no obvious points of concern.  Any input on nicads will be 
helpful.  BTW the generator is a 6000 watt propane Honda.  

John Blittersdorf
Central Vermont Solar and Wind  

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