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 detected 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 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. 

 

 

Very good video what is difference between Mico and String Inverters

 

 

Micro vs String Inverter

 

 

You have to watch it before install a solar system.

 

Enphase MI system is much expensive than String inverter,

even more than Optimizer system.

 

But, String inverter system need 6+ panels in series, it means there is a minimum number of panels under similar sun-light condition. but, MI system do not have the minimum requirments, technically 1 panel.

 

so, if have small zone & multi zones (more than 2), MI should be better

except this condition, There is no advantage via the extra cost