Hi,
I installed a PX4 cube in my rover, with two motors (front and rear) and two servos (front and rear).
When I install the second servo the front one start to gitter, so there is a power problem. I also want to connect a DYS Brushless Three-axis Gimbal and a sonar to avoid obstacles.
What configuration did you recommend to me? a powerful ESC to power all the units? or another configuration?
Thank’s for your help guys
Eduard
You may want to use separate BEC’s depending on voltage requirements. I have FPV stuff that runs on the boats 3S battery, a BEC set at 5 volts for the RFD 900 and two Gopros, and a BEC set at 5.7 volts for a variety of servos. The 5.7 volt BEC is what powers the rail on my Pixhawk 1. I forget what is powering my gimbal but it is most likely off the 3S batteries that power the ship.
Hi @David_Boulanger
Thank’s for your point of view, I’m going to build two power systems, one, for servors and engines, and another for electronics and let’s see if it works better 
Thank’s for yor help again