Hi Jason,
There is a risk of damaging the microinverter if the input voltage goes over
the "Max Input Voltage" as listed on the
datasheet<https://support.enphase.com/s/article/Enphase-IQ-7-and-IQ-7plus-Microinverter-Data-Sheet>.
The max input voltage is 48Vdc for the IQ 7s and 60Vdc for the IQ 7+
microinverters. You can reference the Enphase Module Compatibility
Calculator<https://www4.enphase.com/en-in/support-module-compatibility-en> and
see if that specific module is compatible in that specific location.
The largest risk of seeing a high voltage at the input terminal will occur on a
cold day when the electricity is out or breaker is off. If the utility power
is present and in range, then the microinverter will likely be powered up and
will pull the DC module voltage down to the Vmp.
Cordially,
Nick Soleil
Enphase Energy Senior Product Manager
(707) 763-4784 x7267 // office
(707) 321-2937 // cell
Powering What’s Next™ | The Enphase Energy Management
System<https://enphase.com/en-us/products-and-services/envoy>
NABCEP Certified Solar PV Installer #03262011-300
California C10 Licensed Electrician #986315
From: RE-wrenches on behalf of
Jason Szumlanski
Sent: Monday, December 27, 2021 3:13 PM
To: RE-wrenches
Subject: [RE-wrenches] Incompatible Module with Enphase Microinverters
EXTERNAL EMAIL - Use caution when responding, clicking, and/or downloading
attachments.
Does anyone know what happens when you put a 72-cell module on an IQ7 that is
designed for 60-cell compatibility only?
I have "inherited" a site where my initial research appears to indicate they
have 300W 72-cell modules on IQ7 microinverters. I might have bad information
from what the original installer entered in Enlighten - that remains to be seen.
While they have a branch circuit down, the other branch circuit seems to be
working completely normally. So I'm thinking they actually have 60-cell panels
installed, but I am still curious what would happen if they were, in fact,
72-cell. Would they just fail to produce power when the Vmp exceeds the
operating range? Or would they start up at all given that the Voc might be out
of range?
Curious
Jason Szumlanski
Florida Solar Design Group
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