Hex PoE to HAP AC boot fail - POE Overload issue

Have an issue with Hex POE powering HAP ACs via PoE at 48v. All on current stable software (6.47).

2 HAP ACs, one works (mostly) takes ~ 7-20 seconds to decide to boot, with Hex POE reporting “overload” for this time, then eventually settles down and boots. [Most of the time, but is not consistent]

The other HAP AC is not able to boot when being fed 48V from HEX POE. The Hex POE reports “overload” and the HAP sits there ticking every second as the HeX tries to reset the port power.

Both HAP ACs work perfectly when fed by power jack -24 or 48v.

This works fine:::: 24v 2.5A Power supply → Hex Poe → HAP AC

This does not:::: 48v 2A Power supply → Hex Poe → HAP AC

Problem: HAP AC sits there clicking (1second), Hex Poe states overload - power cycling the port.

Have tried multiple cables - no joy.

I want to use 48v for active poe devices - 24v is not standard.

Any ideas?

Dave

Since this is 1st result from Google I’m going to give some background: it will not work. The hAP ac resistance is too low per MT support (https://www.reddit.com/r/mikrotik/comments/zyh1ln/rb5009_powering_hap_ac/j3x8e1m/):

The issue is in hAP ac PoE-In resistance, it is too low. Unfortunately, it is a common issue with RB962UiGS-5HacT2HnT (RB962, hAP ac).
You may try to power your rb5009 with 24-28V PSU, it may help to resolve an issue with RB962UiGS-5HacT2HnT powering from PoE.