07/19/2022 11:25 (*.63.236.74)
242

Untitled.jpg

 

'No Grid Profile' means the inverter has bricked,

and then, recovered by watch-dog reset.

and, 5min start-up delay.

 

If say a result first, nothing improved yet.

 

More evidence(users) are complaining Ehphase IQ7+ Inverters are showing Random Produciton Drop with 'No Grid Profile' error with Firmware v4.27 or v4.28. I have thought firmware v4.28 can resolve the issue, but, not.

 

Now, I decide to change wiring for all inverters to check the difference.

This is the current layout, there is no issue at Rear Roof, Only issue at Front Side Upper/Lower Roof.

So, I just try to simplify the front root layout.


This is the current layout, 

 

layout_before.jpg

 

i have updated the layout as below

 

(1) rear roof  - I have reduced the Q-cable length by 4'

 

(2) front roof - change the wiring, and reduce the power on the wire by half. the length has reduced by 4'. and, it is a new wire from roof to load-center usung 10 AWG THHN-2, have installed an independent breaker. 

 

(3) porch - direct to JB, No more path thru on front roof panels, so, the power path have reduced by 12'

 

 

layout_after.jpg

 

Base on my calculation, this change has lmproved for the voltage rising and interference of panels (inverters). 

 

layout_single_line.jpg

The first day of test, I cannot find any noticeable difference. actually, the inverters are showing error continously. (OTL), but, I wish to compare the difference before/after the layout changes (if there is any improvements)
 

 

 

 

 

02/28/2022 17:58 (*.63.236.74)
551

 

1. Will getting worse

2. Not related with GRID - no need to check grid or profile

3. Just power on reset - at first power on reset, it is showing 'Grid Instability Error' because no grid profile

 

https://support.enphase.com/s/question/0D52G00004ZVmwjSAD/anyone-else-having-issue-with-some-of-their-iq7-microinverters-randomly-dropping-out-around-the-same-time-every-day

 

https://support.enphase.com/s/question/0D53m00007P62ncCAB/grid-instability-issue-anyone-have-similar-issue-