Hi Rebecca and all,
We're experiencing the same thing on several M190 sites, though not all.
Interestingly, M190s that have been replaced are not having the same
problem.
According to Enphase, it is a software problem. My understanding is that
they are rolling back software updates on affected devices to solve the
problem, but I'm not clear on the exact order that will happen.
Not sure if being a squeaky wheel on particular systems is going to hurt
or help. Kind of disappointing that they didn't properly beta test any
software updates on all types of microinverter devices before rolling
them out to all customers. Seems like that would be common sense.
Best,
Louis
--
Louis Woofenden
Engineering Director
Net Zero Solar, LLC
101. W. 5th St., Tucson, AZ 85705
Arizona ROC #248710, 259756, 259521
Phone:520.207.4053 <tel:520.207.4053>Ex. 2
Cell:520.237.5040 <tel:520.237.5040>
Fax:520.203.7230 <tel:520.203.7230>
NABCEP Certified PV Installation Professional™
NABCEP Certified Solar Heating Installer™
Luke Christy wrote:
Hi Rebecca,
After you posted this I looked at the power production history for
several of our Enphase sites with M190s, and the same thing is
happening. Inverter output is being clipped at 140W across the board.
This seems like a pretty big deal in terms of potential lost
production for a lot of users.
Have you brought this up with Enphase?
-Luke
NABCEP Certified PV Installation Professional™: Certification #031409-25
NABCEP Certified Solar Heating Installer™: Certification #ST032611-03
CoSEIA Certified PV Installer
Solar Gain Services, LLC
PO Box 531
Monte Vista, CO 81144
[email protected] <mailto:[email protected]>
719.588.3044
www.sgsrenewables.com <http://www.sgsrenewables.com/>
On Jan 31, 2016, at 21:08, Rebecca Lundberg
<[email protected]
<mailto:[email protected]>> wrote:
I just noticed that several of our sites with Enphase M190s are
current limiting at 140 watts. These units used to clip at 199 watts
so I feel like our customers just lost a potential 30% of their power
output. It appears to be related to a firmware update
520-00008-r01-v01.08.00. We've got one site with just 8 units, 1 of
them got this firmware update back in September and has been limiting
to 140w since then, 5 of them got this update in late January and
have been limiting to 140w since then, the other two are at a
previous firmware version and are performing as we would expect up to
199w. Have any of you noticed this same thing? Do you know what this
is about? It doesn't feel very fair on the user end of things.
Sincerely,
Rebecca Lundberg
Powerfully Gree
n
Minnesota
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--
--
Louis Woofenden
Engineering Director
Net Zero Solar, LLC
101. W. 5th St., Tucson, AZ 85705
Arizona ROC #248710, 259756, 259521
Phone:520.207.4053 <tel:520.207.4053>Ex. 2
Cell:520.237.5040 <tel:520.237.5040>
Fax:520.203.7230 <tel:520.203.7230>
NABCEP Certified PV Installation Professional™
NABCEP Certified Solar Heating Installer™
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