Is the Notifier NFS2 640 (and likely any of the Onyx family) filtered or "FWR"?

Just wondering, because I can’t 100 percent tell. I was trying to eye the PSU section. It does look like there are filtering capacitors.

Yes, all of the Onyx family panels output filtered DC power.

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According to the table in this topic (which I just noticed is broken even though it wasn’t previously) the NFS2-640 outputs filtered DC.