The test benches consist of a special foundation with air springs, DUT mount, the load machine and battery simulator. Operation with a vehicle battery is optional. The conditioning system for the liquid cooling ensures reproducible conditions in the cooling circuit depending on the load. The test benches can be equipped with a climatic chamber for simulating environmental conditions on request. Our flexibly configurable PAtools TX automation system controls test benches with their auxiliary equipment and acquires all measuring and computing quantities.