PV Inverters module strings [RE-wrenches]

[William Miller]

Friends:

I'm working on design for installation of some Trace Technologies PV series
3 phase inverters.  I am trying to figure out how many panels to put in
series.  I've called several numbers for Trace and left voice mail all over
the company but I can't seem to find a human being to talk to.

The specifications call for a MPPT tracking window of 300 to 480 VDC (360
nominal).  The maximum open circuit voltage is 600 VDC.  I made a
spreadsheet listing options of from 1 to 28 SR100 panels.  I used the OC
voltage, the voltage at load (17.0 VDC) and nominal voltage.   28 panels in
series has an open circuit voltage of 604.8 VDC so that is one panel too
many.  25 in series has a nominal voltage of 300 VDC.  So I am guessing it
has to be between 25 and 27 modules.

Has anyone else designed one of these systems yet?  How many modules did
you calculate go in series?

Thanks in advance,

William Miller


__________________________________________________________________
William Miller
SLO Communications: Communications and Power Systems Consulting
PO Box 50, Santa Margarita, CA 93453
Voice :805-438-5600		Fax: 805-438-4607	VMail: 805-546-4875
email: wrmiller at slonet.org
License No. C-10-773985
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