pclifton
Well-known member
And, so it begins. On the East Coast we have had a very cloudy December and January. Enphase updated all of my M190 firmware when I installed a new Envoy to 520-00008-r01-v01.08.01. Also note that four of my original 24 M190s have been replaced due to failures. It has been difficult given the weather to find a good sunny day for comparison, but my feeling was that the system efficiency went WAY DOWN. Note: EAST_TPM and CENTER_TPM have M190s (installed in late 2010), the WEST_TPM is all M250s (installed in 2015). While we had two sunny days where the M190s produced 180-190 watts back on January 19th, it looks like all twenty of the original M190s failed today, clipping power to 140 watts, here are the results for today.
The four M190s that have been replaced are showing a peak power of 181w, 182w, 187w, and 189w. It should be noted that the ones showing 187w and 189w are M190IGs. The worst of it is I now have twenty (20) M190s that peak out at 139-140 watts. This is completely unacceptable. During the middle part of the day my output is down 40w x 20 inverters = -800w
I don't look forward to trying to speak with someone at Enphase next week. Given what has been posted here I suspect that is a dead-end. I can try to get a "solar professional" from 40 miles away involved, but to be honest. I am considering another manufacturer. Looks like the micro-inverter experiment did not turn out too well.
Ken Clifton
The four M190s that have been replaced are showing a peak power of 181w, 182w, 187w, and 189w. It should be noted that the ones showing 187w and 189w are M190IGs. The worst of it is I now have twenty (20) M190s that peak out at 139-140 watts. This is completely unacceptable. During the middle part of the day my output is down 40w x 20 inverters = -800w
I don't look forward to trying to speak with someone at Enphase next week. Given what has been posted here I suspect that is a dead-end. I can try to get a "solar professional" from 40 miles away involved, but to be honest. I am considering another manufacturer. Looks like the micro-inverter experiment did not turn out too well.
Ken Clifton