User avatar
RegGuheert
Posts: 5429
Joined: Mon Mar 19, 2012 4:12 am
Delivery Date: 16 Mar 2012
Leaf Number: 5926
Location: Northern VA

Re: Enphase field MTBF: M190: ~38 Years M215: ~460 Years M250: >300 Years

Mon Jun 19, 2017 6:01 am

iPlug wrote:Line 183 update.

Prior reported existing system with 28 Suntech 245 Pluto with 28 M215 Enphase microinverters: still no inverter failures.
Thanks, iPlug!

That brings the MTBF of your M215s up to over 136 years and still you have no failures. That's a very good result for a five-year-old system. My M190-based system (with 42 inverters) had four failures by the time it was that age.
iPlug wrote:System upgraded with additional installation 4/5/17 with 15 LG305 Neon X with 15 M250 Enphase microinverters. No inverter failures. Using same Envoy.
Thanks! Added. Currently, these new M250s reside in row 198. Those M250s are attached to the highest-power PV modules I am tracking. Hopefully they will fair as well as all of the other M250s have.

BTW, any chance those M250s are the 72-cell versions? I've noticed quite a few of those kicking around on eBay, so I thought I would ask.
iPlug wrote:Using same Envoy.
Just so everyone knows, I do not have a great idea of what to do with the Envoy MTBF columns when new inverters have been added to the system. As such, the overall MTBFs calculated for the Envoys are certainly not correct. The good new here is that many of us have had our Envoys operating for over 6 years without any failures. While that tells us nothing about MTBF, it provides a bit of comfort regarding the life of a component which used to come with only a one-year warranty (now five).
RegGuheert
2011 Leaf SL Demo vehicle
2011 miles at purchase. 10K miles on Apr 14, 2013. 20K miles (55.7Ah) on Aug 7, 2014, 30K miles (52.0Ah) on Dec 30, 2015, 40K miles (49.8Ah) on Feb 8, 2017.
Enphase Inverter Measured MTBF: M190, M215, M250, S280

iPlug
Posts: 15
Joined: Thu Apr 28, 2016 6:47 pm
Delivery Date: 25 Apr 2016
Location: Rocklin, CA

Re: Enphase field MTBF: M190: ~38 Years M215: ~460 Years M250: >300 Years

Mon Jun 19, 2017 6:39 pm

RegGuheert wrote:...Those M250s are attached to the highest-power PV modules I am tracking. Hopefully they will fair as well as all of the other M250s have.

BTW, any chance those M250s are the 72-cell versions?...

Understandably the M250 have peak output of 250W and continuous at 240W. So the 305W panels seem like a poor match. But I added all 15 of these panels to a northwest facing roof slope, so probably little lost.

For example, today the highest output panel maxed at 216W (almost summer solstice but 111F today). A week ago, on an unseasonably cool day, the system had the best production to date and one panel hit a record 239W at peak exposure. On most prime days, the panels max 10-20W lower than this.

The M250s are 60-cell versions.

Thanks for your work on the spreadsheet!
2016 Leaf SV + 2012 Plug-in Prius, 11.43 kW Solar PV, Two Clipper Creek Level-2 7.7 kW charging stations, PG&E E-6 TOU/Tiered rate plan

GetOffYourGas
Posts: 1499
Joined: Tue Dec 20, 2011 6:56 pm
Delivery Date: 09 Mar 2012
Location: Syracuse, NY

Re: Enphase field MTBF: M190: ~38 Years M215: ~460 Years M250: >300 Years

Tue Jun 20, 2017 4:46 am

I may be looking at my 4th M215 failure. The inverter flickered on and off for the past two weeks, and has not produced anything at all since Saturday afternoon (6/17 at 1:30). I got the automated email this morning. I'll probably call my installer later today.

This is the typical behavior that I've noticed for other inverters in the last week or two of their lives.
~Brian

EV Fleet:
2011 Torqeedo Travel 1003 electric outboard on a 22' sailboat
2012 Leaf SV
2015 C-Max Energi (302A package)

User avatar
RegGuheert
Posts: 5429
Joined: Mon Mar 19, 2012 4:12 am
Delivery Date: 16 Mar 2012
Leaf Number: 5926
Location: Northern VA

Re: Enphase field MTBF: M190: ~38 Years M215: ~460 Years M250: >300 Years

Tue Jun 20, 2017 5:36 am

GetOffYourGas wrote:I may be looking at my 4th M215 failure. The inverter flickered on and off for the past two weeks, and has not produced anything at all since Saturday afternoon (6/17 at 1:30). I got the automated email this morning. I'll probably call my installer later today.

This is the typical behavior that I've noticed for other inverters in the last week or two of their lives.
I know you are aware of this but, unfortunately, your system is a strong outlier in the field when compared with all other M215-based systems. This failure (reported on the anniversary of when you reported your second failure) means that 25% of your inverters have already failed and your MTBF has dropped to only 22 years. The overall MTBF of the M215s I am tracking is now around 400 years, or about 20X what you are experiencing. In fact, my slightly-older M190s now have a demonstrated MTBF which is approximately twice what you are seeing. In fact, it has been about 10 months since my last M190 failure (though I only have 12 operating right now).

BTW, is Enphase sending you M215IGs as replacements? (I think you said they were previously, but I wanted to confirm that.)
RegGuheert
2011 Leaf SL Demo vehicle
2011 miles at purchase. 10K miles on Apr 14, 2013. 20K miles (55.7Ah) on Aug 7, 2014, 30K miles (52.0Ah) on Dec 30, 2015, 40K miles (49.8Ah) on Feb 8, 2017.
Enphase Inverter Measured MTBF: M190, M215, M250, S280

GetOffYourGas
Posts: 1499
Joined: Tue Dec 20, 2011 6:56 pm
Delivery Date: 09 Mar 2012
Location: Syracuse, NY

Re: Enphase field MTBF: M190: ~38 Years M215: ~460 Years M250: >300 Years

Tue Jun 20, 2017 5:50 am

RegGuheert wrote:
GetOffYourGas wrote:I may be looking at my 4th M215 failure. The inverter flickered on and off for the past two weeks, and has not produced anything at all since Saturday afternoon (6/17 at 1:30). I got the automated email this morning. I'll probably call my installer later today.

This is the typical behavior that I've noticed for other inverters in the last week or two of their lives.
I know you are aware of this but, unfortunately, your system is a strong outlier in the field when compared with all other M215-based systems. This failure (reported on the anniversary of when you reported your second failure) means that 25% of your inverters have already failed and your MTBF has dropped to only 22 years. The overall MTBF of the M215s I am tracking is now around 400 years, or about 20X what you are experiencing. In fact, my slightly-older M190s now have a demonstrated MTBF which is approximately twice what you are seeing. In fact, it has been about 10 months since my last M190 failure (though I only have 12 operating right now).

BTW, is Enphase sending you M215IGs as replacements? (I think you said they were previously, but I wanted to confirm that.)


Yes, sadly my system is quite the outlier. I couldn't tell you why, exactly, although I do wonder if my installer did something wrong or cheaped out somewhere he shouldn't have. I now have 4 of the 6 known M215 failures in your spreadsheet. Lucky me.

I double-checked my enlighten page. All three M215s that have been replaced so far have had M215IGs as their replacement. This failure is one of the original M215s, and not an M215IG. I will report back when this fourth inverter gets replaced.

Do you want me to dig into when each of the M215IGs were installed? Maybe you should add them as a separate line in your spreadsheet, so they don't get counted with the M215s.
~Brian

EV Fleet:
2011 Torqeedo Travel 1003 electric outboard on a 22' sailboat
2012 Leaf SV
2015 C-Max Energi (302A package)

User avatar
RegGuheert
Posts: 5429
Joined: Mon Mar 19, 2012 4:12 am
Delivery Date: 16 Mar 2012
Leaf Number: 5926
Location: Northern VA

Re: Enphase field MTBF: M190: ~38 Years M215: ~460 Years M250: >300 Years

Tue Jun 20, 2017 6:36 am

GetOffYourGas wrote:Do you want me to dig into when each of the M215IGs were installed? Maybe you should add them as a separate line in your spreadsheet, so they don't get counted with the M215s.
I have the information in the spreadsheet in the notes for your system. (Approximate dates are fine for this purpose, but if you'd like to provide accurate dates, that's great!) If you would like me to break them out like I have done with the M190IGs, I certainly can. Unfortunately, the M190IGs look particularly unreliable thus far. As far as M215IGs go, I'm in your boat: I have 100% of the known-to-me failures!
RegGuheert
2011 Leaf SL Demo vehicle
2011 miles at purchase. 10K miles on Apr 14, 2013. 20K miles (55.7Ah) on Aug 7, 2014, 30K miles (52.0Ah) on Dec 30, 2015, 40K miles (49.8Ah) on Feb 8, 2017.
Enphase Inverter Measured MTBF: M190, M215, M250, S280

GetOffYourGas
Posts: 1499
Joined: Tue Dec 20, 2011 6:56 pm
Delivery Date: 09 Mar 2012
Location: Syracuse, NY

Re: Enphase field MTBF: M190: ~38 Years M215: ~460 Years M250: >300 Years

Wed Jun 21, 2017 12:54 pm

I was chatting with my friend (not a member of MNL) about your spreadsheet, and how I have 4 of 6 known M215 failures. He was intrigued, and gave me permission to give you info to add to your spreadsheet.

His public envoy site: https://enlighten.enphaseenergy.com/pv/ ... 9/overview
Located in Clay, NY
In service since 8/9/2011
Consists of 24x Suntech STP225-20/Wd modules mated with 24 M215 inverters

No failures to date.
~Brian

EV Fleet:
2011 Torqeedo Travel 1003 electric outboard on a 22' sailboat
2012 Leaf SV
2015 C-Max Energi (302A package)

Tracksyde
Posts: 2
Joined: Thu Jan 12, 2012 11:43 am
Delivery Date: 12 Jan 2012

Re: Enphase field MTBF: M190: ~38 Years M215: ~460 Years M250: >300 Years

Thu Jun 22, 2017 5:20 pm

Hi RegGuheert,

Update for lines 204-206 - no issues with any of the 3 systems (all S280s)

I have a friend who just had a system installed with the new IQ6+. I dont have his public Enphase URL yet (it doesnt seem to be enabled, but his system ID is 1267857).

But if you want to add him now, he has 20x320W LG panels using IQ6+ and the compatible Envoy S. He's in Irvine, CA. His system was turned on 6/21/2017 at 2PM.


Thanks!

iPlug
Posts: 15
Joined: Thu Apr 28, 2016 6:47 pm
Delivery Date: 25 Apr 2016
Location: Rocklin, CA

Re: Enphase field MTBF: M190: ~38 Years M215: ~460 Years M250: >300 Years

Thu Jun 22, 2017 8:40 pm

Tracksyde from PriusChat? Says you've been around since 2012 here, but one post. Good to see you on the flip side.
2016 Leaf SV + 2012 Plug-in Prius, 11.43 kW Solar PV, Two Clipper Creek Level-2 7.7 kW charging stations, PG&E E-6 TOU/Tiered rate plan

sandeen
Posts: 25
Joined: Fri May 12, 2017 1:45 pm
Leaf Number: 026685

Re: Enphase field MTBF: M190: ~38 Years M215: ~460 Years M250: >300 Years

Fri Jun 23, 2017 7:25 am

In case you're still interested, I've lost 2 M190s in about 7 years, here is my array.
2012 SL, used

Return to “Solar”