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

[Bill Brooks]

William,

 

Just to add one more thing. I said that the M215 does not match well, but if
you have them on hand, they would still work. You will probably power limit
in the spring and fall, but the rest of the year you will probably do fine.
The M250 has a higher operating voltage for 72-cell arrangements. The M215
is more suited for 60-cell modules and circuits.

 

Bill.

 

 

From: re-wrenches-bounces at lists.re-wrenches.org
[mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of William
Miller
Sent: Thursday, September 26, 2013 10:01 PM
To: RE-wrenches
Subject: [RE-wrenches] Using legacy modules on micro-inverters

 

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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