Hello scyto,
In a heavy X-10 environment we have seen packet collision. Less than in our TED 5000 systems, but still there. Filters seem to handle the issue if it's possible to filter the TED system from the rest of the panel, or the X-10 device(s) from the TED System. The problem is that X-10, Insteon and Enphase all use PLC that doesn't look for other traffic on the PLC line or if it does, it only looks for X-10, Insteon, or Enphase traffic respectively. Our system attempts to wait for a clean line before sending a data packet, but that doesn't matter if another system is "blindly" sending data packets as well, as we can't predict when another system will send data.
If your installation has a lot of other PLC communicating devices, a filter may or may not help. A solution would be to upgrade to the TED Pro Commercial system and use TCP instead of PLC. An expensive solution, certainly, but a guaranteed one. Hopefully one of our customers using Enphase or Insteon can chime in with additional information about their installation and PLC.
Best Regards,
TED Forum Support