ESD control to protect personnel inside container van
Based on the comments I suspect the correct question is: &quot;how to protect personnel operating mobile equipment from shocks&quot;
To which the answer is, with ground and residual current protection.
You attach a ground lead to the chassis of the container, and this lead goes to a ground rod. A big spike in the ground.
Then you attach one lead of the power supply, battery/generator to the chassis. This is neutral. And you wire up a switchboard of RCD breaker (GFCI) that then trips at soon as there is too much leakage. As in someone is touching the live wire.
Buy the right kind of RCD, for DC they are more complicated.
On mobile generators you sometimes have multiple ground rods with a protection device to ensure ground impendance is correct before enabling the power supply.
Obviously when using an external mobile generator or mains you can't just tie one lead to ground. Those plugs will already offer you a ground and neutral wire since they did probably that for you already depending on local electrical standards.

eg bus driving, tank operation, aircraft combat etc

This suggests you're making a military mobile command centre, for which I'm sure there are tons of guidelines and regulations regarding electrical safety.