Okay, I know this is an old thread but since I'm the one who started it and this post directly answers the question I had two years ago, I thought I would go ahead and use the thread to establish some reality to interference caused by solar panel and inverter installations.
I had a SolarCity solar system installed on my roof several weeks ago. After waiting for the necessary myriad of inspections, the new meters were installed by NVEnergy on Tuesday and the system was turned-on just before sunset that same day. Yesterday I began to notice that my BO system was going into and out of interference mode. At sunset last night (Wednesday) the interference mode suddenly stopped and normal BO operations were noted. This morning, about 30 minutes after sunrise, I see the BO system going into interference mode.
So, the troubleshooting has begun with reducing the gains on both channels of my RED Amp 1. Immediately, I dropped out of interference mode so this further verifies that my interference issue is something external. I'll watch it tonight to see what happens after sunset and the solar system goes idle again.
On another note, being a ham radio operator, I was concerned about the impact the solar system may have on HF interference on the low bands. Thankfully, I have noticed no increase in noise levels whatsoever on any of the HF bands from 160M through 10M.
My solar system was installed by SolarCity, a subsidiary of Tesla. I have 21, 305W panels and one inverter. My solar equipment is very close to my ham equipment except for the HF antennas which are approx 75 feet away. So, it appears to be pretty shielded from a HF radiation viewpoint.