Summary: Add an electrical switch in line with the camera, turn the Nightwave on after the rest of your electronics.
The Nightwave requires a clean, stable source of DC voltage. When running from the hardwired power cable this is 12 volts (nominal). The Nightwave camera will pull a maximum of 2.5 Watts (~210 mA at 12V) but steady-state power requirements are significantly lower than this.
Clean, stable DC power means the line voltage should ideally be free of voltage drops and high frequency noise - which can be common when batteries are charging, or as other electrical loads come on-line after a master switch is thrown.
Therefore, we recommend installing a switch in series with the Nightwave and (supplied) 2A fuse.
The addition of a switch will enable you to start up the vessel and other marine electronics, and a few seconds later, turn on the Nightwave after your vessel’s DC line voltage has stabilized. As well as isolating the Nightwave from start-up noise, this switch will also enable you to reboot the camera if required.
Please remember to switch off the Nightwave with the rest of your vessel, so that the Nightwave is OFF (and therefore isolated from voltage noise) the next time you throw the switch for the rest of your marine electronics.