Common Mode Noise Filter – Coax Solar System RFI Solutions Store / Solar System RFI Solutions Off Grid Solar Systems Off Grid Solar Systems Grid Ties Solar Systems Grid Ties Solar Systems Featured Products Solar Charge Controller RFI Kit - 3 I/O Ports Solar Charge Controller RFI Kit - 3 I/O Ports SKU Solar-CC3 $37.95 Buy Now Typical user comment: The filter was quite effective. Was surprised that it actually reduced the noise level more than the signal so S+N/N improved by 1.9 S units. Bill