Tests at the Bosch proving ground in Boxberg showed that when towing a caravan with an electric vehicle, consumption depends not only on the trailer's weight. A Tesla Model Y Performance and a diesel Škoda Karoq were compared with Fendt Bianco 495 SG and Next 380 caravans. At 100 km/h, the Tesla's consumption rose by about 35%, the diesel's by around 25%. The larger Fendt was more efficient than the smaller Next: at 100 km/h with the Next, the Tesla used 3.3 kWh/100 km more. At 80 km/h with the Fendt, the diesel cost 21.93 euros per 100 km, the Tesla 20.41 euros; electric range was about 200 km versus 500 km for the diesel.