The permissible total weight of the e-kids and the e-cargo is 200 kilograms. This means that in addition to the 38 kg for the CHIKE itself, 162 kg can be divided between the rider and the load.
The other payload options also have maximum possible loads:
E-kids cabin: 60 kg
Euro boxes: 12 kg each
Luggage rack: 25 kg
Platform/box for E-cargo: 80 kg
Rider weight: 100 kg