The brownfield container terminal at the Maasvlakte aims at realizing a zero-emission vehicle fleet to strive for its aim to be zero-emission by 2040. Therefore, the research question is as follows: “What are the consequences for costs and operational performance of implementing mature renewable energy carriers for AGVs at the container terminals of ECT before 2040?” Literature research is carried out to find the definition for energy carriers and to find out what possible energy carriers exist to transition a fossil fuel-based vehicle fleet into a zero-emission vehicle fleet. The list of possible energy carriers is reduced by a screening, consequently, resulting in the lithium-ion battery and hydrogen as possible candidates for the vehicle fleet of ECT. Consequently, discrete event simulation is carried out to find the operational performances of these two energy carriers. Afterward, a cost calculation is done and a possible phased transition is shown.