Points of interest from the installer’s guide:
Install a PV subpanel to land all the solar branch circuits.
Install a dedicated outlet for the Envoy (and power line communication bridges, if needed) off the subpanel.
Filter the phase conductors running from the subpanel back to the load center.
Ferrite toroids are an effective, simple filtering mechanism.
Refer to this link for more information. Here is the link to the specific model required.
Additionally, I added an EMI ferrite noise core filter on the output of each Enphase micro-inverter. Here is a photo of the Ferrite Core attached to the output of the Enphase micro-inverter. Its the gray thing on the right side. Its clipped as close to the micro-inverter as possible. I also added a cable tie around the ferrite core, as the holding tabs on the ferrite core just barely snapped shut. This was extra insurance that the ferrite cores would stay on the Enphase micro-inverter.
Enhpase micro-inverter with an EMI / RFI ferrite core for noise suppression
This is something that I came up with, as it seemed to make sense to do this. Here is a link for the EMI RFI Noise Ferrite Core Filter for 7mm Cable that I used.
As far as interference to my ham radio, my lowband antennas (80 – 10 meters) are 25 ft. away from the Enphase inverters with no noise problems. My 2 Meter radio is 30 feet away. I also have no noise issue there either.
So now the big question everyone asks, What is the payback? One thing to consider is this, it is far more cost effective to conserve than it is to generate electricity. So before you decide to dive into solar power, make sure you have done everything to conserve. In doing so not only saves electricity, but also reduces the size ,and cost of your solar array.
Conserve first then generate
For example, I replaced my 20 year old refrigerator with a new energy star one. Prior to replacing it, I hooked up my Kill A Watt Meter and measured its power consumption. I found out that it consumed an average of 3 kw per day. Which equates to 90 kw per month. My new refrigerator uses an average of 1 kw per day. This gives me a savings of 60 kw per month. I also switched over to LED lights, as well as other energy saving techniques. As a result of looking at conserving before buying solar, I cut my electric needs by almost half’ Which obviously means that the Solar PV array that I need before conserving, is also cut in half.