Voltage for Cameras and EFW2

[Matt_H]

Hi,
I’m looking at buying a AC/DC power supply. It produces a fixed voltage at 13.8 volts DC from AC.
Is this a ok voltage for the 4 series, Horizion and EFW2?
I notice that my 12 volt battery produces about 12.8 ish volts.

Thnaks
Matt