amperedave wrote:I installed 24 - M190-72-240-S12 with 230w panels on my roof in 2012. Had 11 - M190-72-240-S12 die in 2016. Enphase replaced them with 11 -M190240-M190IG-R & M190-R-1
3 of the replacements M190240-M190IG-R died also in 2016. Enphase replaced them with 3 - M190240-M190IG-R.
That made a total of 14 - replacements in 2016.
I hoped 2017 would be better, but had 2 - M190-72-240-S12 die in 2 months & Enphase replaced them with 2 - M190240-M190IG-R.
I've had no problems with Enphase replacing them! Just the trouble of climbing on roof to replace the dead ones.
I live in Fl and wonder if the heat is a problem?
I'm sorry to hear about all the failures with your M190s. Your MTBF during 2016 is only 1.7 years, which is, by far, the worst MTBF I have recorded for Enphase microinverters.
I have just recently experienced the very first failure of any fourth-generation Enphase microinverter that I know of in January. (The three in my spreadsheet from North Syracuse, NY, were early-build M215s, which I believe contain third-generation electronics similar to the original M190s.) But you had 3 M190IG-Rs die in 2016. Those are fourth-generation inverters. As such, I have to believe that one of three things is occurring:
1) You get hit by lightning frequently (or perhaps you have nearby lightning strikes).
2) There are some issues with grounding in your system. (Even if your system does not have a problem in this regard, the Engage adapter which comes with the M190IG-R inverters does NOT have a way to carry the internal ground into the module AND there is no grounding lug on the inverter case, so I have wondered how these units manage to get grounded in most systems.)
3) Your PV modules have 72 cells instead of 60.
FWIW, another poster here from FL (Weatherman) has most of his M190s replaced a couple of years ago (2014?). Based on his experiences, I had predicted that I would have a spate of M190 failures in 2015. Fortunately, I was incorrect. Only one M190 failed in my system that year. I only had two M190s fail in 2016, but that is partially due to the fact that I replaced most of them with newer inverters in the middle of the year.
Can you please provide a link to your system so that I can add it to my spreadsheet (linked in my signature)?