[RFI] SolarEdge RFI Inverter On/Off Test

[Tony]

All:

My neighbor gave me permission to shut off his SolarEdge solar panel 
inverter while I ran some tests. I recorded the results at my home 
station and noticed that the S-9 spikes disappeared when the inverter 
was turned off. The noise floor also dropped considerably.

A few remaining spikes were tracked to the cabling that feeds the solar 
panel optimizers which were still running in safe mode. Unfortunately, 
there's no way to shut off the optimizers without physically 
disconnecting them.

The noise reappeared when the inverter was turned back on.

Before I left, I decided to probe the AC lines running off the house 
main panel for RFI. Sure enough, there were high levels of the same 
noise on the the exposed lines that run along the basement ceiling of my 
neighbors home. All that noise is feeding into the AC lines so the house 
wiring makes for one big antenna.

Less significant, but worth mentioning is that the inverter does not 
have a dedicated ground rod. It's grounded instead to a water pipe in 
the basement which then splits to the main panel with a 6 foot ground wire.

I also noted the model number of the inverter and found that it's the 
same 6KW unit that Tony Brock-Fisher found to be very noisy.

More to come.

Tony -K2MO