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-

 

 

I have requested a detail information abut LCF-064-1P,

     Enphase - datasheet only

     Manufacturer - can not provide it because customized item

 

No more solution with LCF, I have decided to return the filter on Enphase,

I am not sure the part is no good, or filtering is not enough. 

 

So, I start to find the solution on my way,

 

I have reinstalled RP230-30-10-S and GTX-2300

 

    BUT, it has too high line loss, so, I have disassembled & checked GTX-2300.

    the coil configuration is the two-in-hand winding, it is good for common mode filtering, But, it has lower magnetic 

leakage, so,not good for differential mode filtering. it is not much useful for me.

    so, I have removed it. and, reduce 0.5mA leakage current & 10mOhm Resistance Loss

 

     ferrite_winding.png

 

        RP230-30-10-S have 60dB 50/50 insertion loss, but, can not block

the signal from next door also, I guess, my noise level at my home is too quiet and no one use PLC devices.

Yes, high SNR, so, just Envoy signal can be detected too easily.

 

      so, I have decided to add an extra differential mode filter using ferrite

 

rp230-double_d.png

 

Ferrite core is B64290L0082X065

 

and, look the wire direction, it is the coupled differential mode, and 2 turns.

over one day, it can isolated successfuly, the expected core loss is 200-300Wh per year. 

it is much less than 1~2kWh in GTX-2300-Y02. 

 

This configuration will be saturated under 10A. so, I have tried on single turn. 

at least, I need 20A because higher current will act as a noise, and will reduce the sensitivity of enovy.

and, I just need this inductor is working at the lower current (quite) zone.

 

rp230-single_d.png

 

This is final configuration.

It is working well, now, my system has been isolated completely.

and, no more cross-domain-traffic issue.

 

The cost of Ferrite & RP230 filter is just $80, and under $100 include tax & shipping.

It will working when system current is under 24A (around 20, IQ7+),

If want to apply on the bigger system, need bigger filter

 

 

 

 

AB71E8E4-2B47-4EEC-9AC0-680B57489861 

I have installed shortest wiring, and no overlap to avoid a crosstalk, and just put one Ferrite core to filter a common mode for wire organizing and 10cm overcome earth wires. It may affect on the high frequency, but, it is not our concern because LCF is for 110kHz L-to-L PLC & Noise filtering now.
 

Let me check what will happening, 

 

Updated on NOV 29 2021

 

Long story is short, It is not working

 

LCF.png

This is an error what I do not want to get..

I have requested some advice and, Enphase said

 

Avoid a magnetic PLC coupling by

  - Own enclouser :: it is related with a distance, but, -.-a

  - 12" distance between conductor  :: point to point is not important, parallel run is the key

 

Anyway, I have installed as

 

LCF_ext.png

 

If I add an enclouser for the filter, I have to get a permit & inspection from local office. it become so complicated issue. and, I feel, so strange, the engineer do not understand what is the real problem.

 

anyway, I am not sure what is the cause why it can not block the signal from my next door, 

i understand as it is a customized part for IQ. Maybe it is just a issue of my part. 

 

while low current, Enovy is detecting the other enovy at outside.

IT is happening because my house has very quite in electric noise.

if not cut-out completely, the filter is not enough because still high SNR.