[RE-wrenches] under performing Enphase inverters

[August Goers]

We have over 1000 Enphase units installed of multiple types - mostly M210s
and M190s. We just had our first overt failure of an M190. It just went
dead after a couple of months of operation. I'll keep my eye out for
underperforming units but haven't noticed any yet.



-August



*From:* re-wrenches-bounces at lists.re-wrenches.org [mailto:
re-wrenches-bounces at lists.re-wrenches.org] *On Behalf Of *Jason Szumlanski
*Sent:* Friday, November 04, 2011 6:26 AM
*To:* RE-wrenches
*Subject:* Re: [RE-wrenches] under performing Enphase inverters



I’ve never installed a M210, but we have had dozens of M190 failures,
mostly within a short period of time after installation but a few older
failures have trickled in lately. On one job with 236 208V M190’s, we have
replaced about a dozen. To date we have not had a single M215 failure,
including one job with 164 inverters. Anecdotally, it seems that the M215
is much more reliable. Hopefully that will hold!



Out of all the swaps we’ve done, I’ve never observed one where the power
output was lower compared to adjacent modules. In almost every case there
was zero AC output or a GFDI fault.



And yes, Enphase has paid $150 per swap, although you have to remember to
go through the RMA registration process online. Overall they have been
excellent about honoring the product warranty with few questions asked.
That being said, I do have better things to do than swapping inverters!



Jason Szumlanski

Fafco Solar





*From:* re-wrenches-bounces at lists.re-wrenches.org
[mailto:re-wrenches-bounces at lists.re-wrenches.org] *On Behalf Of *Mark Frye
*Sent:* Thursday, November 03, 2011 6:23 PM
*To:* 'RE-wrenches'
*Subject:* Re: [RE-wrenches] under performing Enphase inverters



I have a fleet of 43 - 190's and 39 - 380's.



To date I have replace 3 - 190's and 2 - 380's.



All have been identified by close review of the display data and variation
in performance relative to adjacent units.



Each has been replaced under warranty with a service fee reimbursement of
$150.


Mark Frye
Berkeley Solar Electric Systems
303 Redbud Way
Nevada City,  CA 95959
(530) 401-8024
www.berkeleysolar.com




------------------------------

*From:* re-wrenches-bounces at lists.re-wrenches.org
[mailto:re-wrenches-bounces at lists.re-wrenches.org] *On Behalf Of *Marco
Mangelsdorf
*Sent:* Thursday, November 03, 2011 2:27 PM
*To:* 'RE-wrenches'
*Subject:* [RE-wrenches] under performing Enphase inverters

For the first time, several weeks ago, after 40-50 Enphase installs, we’ve
come across at least two M210s that we putting out consistently lower
outputs than their immediate neighbors.



We replaced the two mods first, which made no difference.  Then, in
consultation with Enphase, replaced the M210s.  After replacing them, the
power output was as it should be.



Now I’ve got another suspect system with several underperforming mods out
of (36).



Has anyone else had this experience?



Thanks,

marco
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