This is the inventory.json data from Enphase Envoy Gateway, 

There are 4 flags as producing/communicating/provisioned/operating. 

Each flag has true or false value. 

Some inverters are showing false for producing/operating flags. 

I have tracked the actual production, but, the inverters are producing/operating normally.

Just flags are showing as false. 

It is showing when the flag error is more happening, 

and, I found that is caused with my next door under 'cross-domain-error'

This interference is not happening while low production status such as 0.5kW or lower,

Maybe I am ignoring the flag check when 'low power DC' status, 

so, I want to say the flag error is happening but not showing in the graph. 

when production power is going over 1kW, the flag error has been gone, 

Actually, power line noise is going-up over the signal from my next door,

so, no more interference are happening. 

Because some communication loss issue when installed PLC filter, I have removed it. 

The X capacitor in PLC filter can reduce the signal level from inverters, and it disturbe a communcation. 

after remove the filter, the signal from next door is coming in more easily. 

I have increase the line impedance using inductors up to 100Ohm. 

But, it can not stop the signal enough because no bypass Y capacitor. 

Even can avoid a communcation error between gateway and inverter after removing PLC filter. 

There is no clear solution to resolve the communcation conflict with my next door.