Hi Dave,
You should calculate your voltage drop for the entire round trip
distance of this circuit and size the wire accordingly. It does not
matter where the wire is located in the series circuit; just the total
length.
Kindest Regards,
Larry Crutcher
Starlight Solar
(928) 941-1660
Renewable Energy Products, Service and Installation
Mailing Address (NO SHIPPING):
11881 S Fortuna Rd.
#210
Yuma, AZ 85367
Shipping and retail store (NO MAIL):
2998 Shari Ave
Yuma, AZ 85365
On Apr 21, 2009, at 3:19 PM, 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
www.independentpowerllc.com
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