Description of the new feature / enhancement

make the resource consumption scale with the mass of the vessel being effected

Proposed technical implementation details

code change.
when unit powered on, consume EC at rate ECbase * vessel.mass

from @Lisias

If you are on a PartModule, try

this.vessel.GetTotalMass();

This will get yout the current total mas of the vessel, including everything inside (fuel, and I think kerbals too).

https://www.kerbalspaceprogram.com/ksp/api/class_vessel.html#a5f5aa50edff7f5b58df6fe4ff4ec298c

There's also this "RevelMass()" thingy, but theres's no documentation on it.