Trace C-40 voltage stability on wind systems [RE-wrenches]

[Hugh Piggott]

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Hi

I have been using Trace C-40 diversion load controllers on my recent 
AWP installations.  I wonder if anyone else out there has experience 
of using them on wind turbines?  My experience has been that the 
battery voltage wanders.  If you take an average over time, it 
charges the batteries at the required level, but at any given moment 
the voltage can be as much as ten percent off, and is typically five 
percent off the set point.

I have tried to ignore this problem up to now and just say 'well it's 
Trace it must be good'.  I love the ability to program two charge 
rates into the controller.  Many wind turbine controllers can't do 
this.  But I am getting increasingly frustrated by the wandering.  It 
doesn't seem right and if it wanders up far enough the inverter cuts 
out and then the problem becomes a bit more tangible than a weird 
reading on a digital meter.

Any ideas?
-- 
Hugh

http://www.scoraigwind.co.uk/

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