EP = available e-motor power for driving, GEN = maximum recuperation power of electric machine as generator
* reference load:
N1: net weight + variable loading condition: starting load 500 kg, 34 unloadings, end 180 kg, because of undeliverable returns
N2: net weight + variable loading condition: starting load 4.500 kg, 9 unloads, end 0 kg
N3: net weight + variable loading condition: outward journey = empty run, return journey = full load run (20 t)