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The original was posted on /r/ubiquiti by /u/cobbs_totem on 2023-08-20 23:27:03+00:00.

I recently bought a U6P to replace a U5 Lite in my home. My current setup has my PoE injector (I don’t know the output, as it was given to me) going into the ERX, which provides PoE passthrough to the U5 Lite. Everything works great.

With the U6P, I had also bought a Tenda 802.3 at/af PoE, providing 51V/30W. I now realize that this seems like a bad idea to use it to provide passthrough power to the U6, as the ERX will fry with that much voltage - correct?

So, should I just disable PoE passthrough on the ERX and add my Tenda 51V/30W between the ERX output and the U6P instead?