[RE-wrenches] Using legacy modules on micro-inverters

[William Miller]

Friends:

 

I am trying to upgrade a long time off-grid client to a grid-connected
installation.  They have a mix of Siemens PC4JF and Shell SQ-150P modules.
It is my understanding that putting two of the PC4JFs in series is exactly
one SQ-150.  I don't have spec sheets for the PC4JFs but I am told they are
an SP75.  If I use the data for the SP75 and multiply the voltages by two I
get exactly a SQ-150P.

 

Anyway, putting two 36 modules together makes one 72 cell module.  This
would likely work with an Enphase M190 but those are no longer manufactured.
Same with the M215.  Power One makes a micro that meets the predicted
voltage window.

 

I did this a while ago with pairs of SR100s.  It worked great.  Anyone try
this with even older modules, like those cited???

 

Thanks in advance.

 

William Miller

 

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