[RFI] K2MO Solar Panel RFI Issue: Problem Solved!

[Dave (NK7Z)]

Tony,

While things are new, and RFI is clener, take some SDR scans of the the 
various bands...  That way, if things change, you have a reference as to 
what it can be...

See:
https://www.nk7z.net/sdr-rfi-survey-p1/

73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources

On 7/18/24 16:00, Tony wrote:
> All:
> 
> Tesla's solar panel crew arrived at my neighbors QTH yesterday morning. 
> I spoke with the supervisor who assured me that the new Optimizers would 
> solve the RFI issue and that he would go over the entire system to make 
> sure everything was installed properly.
> 
> He mentioned that one of the reasons why the system was so noisy is that 
> NONE of the old Optimzers were grounded and that it's likely been that 
> way since the system was first installed back in 2016.
> 
> I watched the crew apply clamp-on ferrites to the cables coming from 
> each new Optimizer. They ran 3 turns through each core. They grounded 
> everything and twisted the solar panel cables where possible.
> 
> I'm happy to report that, after 8 years of dealing with S-9 plus RFI, 
> the system is now completely RFI-free! My daytime noise floor is as 
> quiet as it was prior to the solar panel installation - about 110~115 
> dbm on 20M.
> 
> There's still a VERY weak carrier detected every 100 kHz on some bands, 
> but that's nothing compared to the S9-plus noise that appeared every few 
> kHz on HF.
> 
> This is great news for those who are having the same issues with Solar 
> Edge systems. The hard part is locating the noise and hoping that you 
> have neighbor who's willing to cooperate.
> 
> I'm very grateful to Steve, W1EMI and the rest of the ARRL staff who 
> helped me with this issue over the years.
> 
> Tony -K2MO
> 
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