how much current is consumed by the 4 12v dc motors to carry 5kgs weight. is a 12v3A battery is sufficient enough to drive them.
Hey,
Well, I had to vote no, since we do not know enough, such as:
The motor specs (no load and stall current, efficiency & torque curves), and details on the battery pack itself (chemistry, maximum continuous & peak discharge rate).
Of course, the motor specs depend on the use case, too (i.e.: gearbox on motor [if any], chosen wheel size, maximum expected travel incline, desired acceleration, etc.). To determine the motors required, have a look at the drive motor sizing tutorial and accompanying calculator.
We recommend that you provide more details about all of this and then better advice can be given to you.
Sincerely,