Pi 4 + PoE hat no boot

Beginners
#1

I have a a couple of new Pi 4 2GB models with accompanying PoE hats. On connection/power on they just sit there on the rainbow screen - which if it’s like the other Pi’s i have, means low current. The SD in it is a new 32GB with a NOOBS install.

I have tried this across a few different PoE switches with the same outcome and it is the same across both PoE hats and Pi’s which are fresh from little bird - they all report the correct PoE class (3) to the switch and the voltage is there at 50-52v but i’m only seeing 80-100mAH current on them through the whole process, which is around 4-4.5watts - seems a little low for this.

Has anyone had this issue or managed to get a Pi4 online with the official PoE hat, these just dont seem to be drawing enough current?

#2

I just caught up w/ Raspberry Pi in Cambridge last week and this (Pi4 + PoE Hat) came up as a topic of conversation.

I was told that the current generation PoE Hat that provides 2.5 Amps should be ok for the Pi 4 (depending on what else you’re hanging off the Pi).

We have no word on an update.

You might want to home brew your own solution if you need more current.

#3

Hmmm the problem i have here is that this is just the hat + pi with a HDMI on it + USB for KB + Mouse, no additional boards. Even cutting it back to just the HDMI without USB shows the same draw, it seems like it’s just simply not drawing the right amount?