I have scratched my head on this one before, because it seems that
two terminals bonded together by a wire are essentially the same
terminal. The theoretical voltage difference on a terminal is
zero. How do we figure a voltage drop on a wire that has near zero
volt potential between the ends of the wire. Can we really use the
voltage of the entire array to figure the drop on an interconnect
between two modules? If so, why can we do this?
Thanks,
Drake
At 07:49 PM 4/21/2009, you wrote:
David,
There will be less than a 1 volt drop in 36 feet of 10 AWG at the 11
amps you get from the Evergreen modules. I don't think anyone will notice.
David
David Katz
David Palumbo wrote:
Does the following series string wiring cause a problem? With (18)
Evergreen ES-A 205's (low voltage modules 18.4Vmp) in series
feeding a grid tie inverter with a long series connector in the
middle of the string. (2) Top Of Pole 9 module mounts with the
series connection from module #8 on the first pole to module #9 on
the second pole. This MC cable connection would be, about, 36 feet
in length to go 10' down the pole below grade 18" for 13' and back
up the second pole 10' (in conduit all the way) .
Will this extra long series wire cause problems?
I could use other modules of course but that would raise the cost
per watt by 70 cents.
Dave
David Palumbo, President
Independent Power LLC
462 Solar Way Drive
Hyde Park, VT 05655
NABCEP Certified
<http://www.independentpowerllc.com>www.independentpowerllc.com
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Drake Chamberlin
Athens Electric
OH License 44810
CO License 3773
740-448-7328
740-856-9648
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