Hello @rlborino and Others.
I have an old 12v CCTV camera system I used to power my V2’s (substitute V3). The old bullet cameras work alongside my Wyze cameras. At the bullet camera locations where a V2 was to be placed, I tapped off the bullet power supply with a 12v to 5v step-down transformer. I some cases I had to upgrade the bullet camera power adaptors to a higher amperage capacity for the added load of the V2.
My post Powering V2’s with old 12 cctv systems
One advantage of tapping off of existing camera power is that the Wyze camera can be power cycled by flipping the switch that controls the old camera.
Hope this helps, Victor