K_and_I wrote:
It's been some time since I installed mine, but, if I remember correctly, you can power the meter off of the board if they are close enough together to be practical. I bought a cheap 12v - 5v adapter off of Ebay and powered my meter from that. I don't remember using a separate 12v wire into the weatherproof box I used. I think the board used the power wire for voltage testing. Someone correct me if I'm wrong.
Thanks K_and_I , but I'm just talking about the display unit for USB power, but turns out since it's USB any 5 common 5 volt USB port will work I think. Thanks!