EcoRenovator - View Single Post - Choosing correct size PV panel for inverter

pinballlooking · 05-06-15, 01:09 PM

The Enphase M190 have a high failure rate. The M215 and M250 have been doing great.

The M215 cost is around $118-$129 each this puts the cost at almost a wash once you add the Envoy. But SolarEdge inverter is only warrantied 12 years Enphase is 25 years.
Envoy is only warrantied for two years.
The M215 will top out a 225 watts I can show many graphs even with my own panels.
http://enphase.com/global/files/M215_DS_EN_60Hz.pdf

The panels do not degrade as fast as published I can still put out 225 watts this time a year with over 2 years old 230 watt panels. I just had my highest max power output in just over 2 years.
The M250 tops out @258 watts.

http://enphase.com/global/files/M250_DS_EN_60Hz.pdf

I am not sure where you are getting your max output numbers from but the ones I posted are from Enphase. I can confirm the M215 number is right on the money.

I would no pair M250 with a 260 watt module. I think they are doing that just to make money.

Close out modules have been 250-260 lately anyway.
They claim 1% loss a year for solar modules most people are not seeing this much loss.

Here is a screen shot on May 27 my panels are just over 2 years old.
The top row are 230 watt panels and the bottom array are 240 watt panels but are at less of a angle as the top. All have M215 microinverters.

I don't get any clipping at all but a bigger module is a better pairing with the M215 a couple years ago I went with what was on sale.

05-06-15, 01:09 PM	#3
pinballlooking Super Moderator Join Date: Jun 2013 Location: SC Posts: 2,923 Thanks: 172 Thanked 564 Times in 463 Posts	The Enphase M190 have a high failure rate. The M215 and M250 have been doing great. The M215 cost is around $118-$129 each this puts the cost at almost a wash once you add the Envoy. But SolarEdge inverter is only warrantied 12 years Enphase is 25 years. Envoy is only warrantied for two years. The M215 will top out a 225 watts I can show many graphs even with my own panels. http://enphase.com/global/files/M215_DS_EN_60Hz.pdf The panels do not degrade as fast as published I can still put out 225 watts this time a year with over 2 years old 230 watt panels. I just had my highest max power output in just over 2 years. The M250 tops out @258 watts. http://enphase.com/global/files/M250_DS_EN_60Hz.pdf I am not sure where you are getting your max output numbers from but the ones I posted are from Enphase. I can confirm the M215 number is right on the money. I would no pair M250 with a 260 watt module. I think they are doing that just to make money. Close out modules have been 250-260 lately anyway. They claim 1% loss a year for solar modules most people are not seeing this much loss. Here is a screen shot on May 27 my panels are just over 2 years old. The top row are 230 watt panels and the bottom array are 240 watt panels but are at less of a angle as the top. All have M215 microinverters. I don't get any clipping at all but a bigger module is a better pairing with the M215 a couple years ago I went with what was on sale. Attached Images Last edited by pinballlooking; 05-08-15 at 09:36 AM..