Good Motortrend article on above mentioned affect on EV range.
The EV used for the test is a 2024 Kia EV9 Land coastdown from 80 mph c/w Racelogic Vbox Touch data logger.
" We performed coast-down testing on the proving ground’s 1.6-mile straight.
Coast-down testing measures a vehicle’s road-load force, or the amount of shove it takes to overcome air resistance, drivetrain friction, and tire losses to maintain a given speed. Automakers regularly use it as part of EPA range and fuel-economy testing, following the procedures and calculations outlined in SAE International’s J2263 standard.
We used a simplified version of the SAE J2263 test for this story, but the basics are the same: Accelerate to 80 mph, shift into neutral, and let the Racelogic Vbox Touch data loggers record the speed trace as the vehicle slowly decelerates. The test is a rolling demonstration of just how aerodynamic and efficient modern cars are. With all the accessories removed, the EV9 sailed for more than a mile and was still traveling 40 mph at the end of the straight."
I am impressed at how little the range reduction is with the cargo carrier, slightly higher consumption with the bikes ( interrupted the airflow more causing increased resistance resistance).
Of course the trailer c/w the rooftop tent was a real range killer.
MotorTrend Road-Trip Range Power at 70 mph
2024 Kia EV9 Land 270 mi 35 hp
+Yakima Roof Box 253 mi 38 hp
+Mountain Bikes 250 mi 38 hp
+Modern Buggy Camper 119 mi 80 hp
+Camper, Bikes, Roof Box 113 mi 84 hp
The EV used for the test is a 2024 Kia EV9 Land coastdown from 80 mph c/w Racelogic Vbox Touch data logger.
" We performed coast-down testing on the proving ground’s 1.6-mile straight.
Coast-down testing measures a vehicle’s road-load force, or the amount of shove it takes to overcome air resistance, drivetrain friction, and tire losses to maintain a given speed. Automakers regularly use it as part of EPA range and fuel-economy testing, following the procedures and calculations outlined in SAE International’s J2263 standard.
We used a simplified version of the SAE J2263 test for this story, but the basics are the same: Accelerate to 80 mph, shift into neutral, and let the Racelogic Vbox Touch data loggers record the speed trace as the vehicle slowly decelerates. The test is a rolling demonstration of just how aerodynamic and efficient modern cars are. With all the accessories removed, the EV9 sailed for more than a mile and was still traveling 40 mph at the end of the straight."
I am impressed at how little the range reduction is with the cargo carrier, slightly higher consumption with the bikes ( interrupted the airflow more causing increased resistance resistance).
Of course the trailer c/w the rooftop tent was a real range killer.
MotorTrend Road-Trip Range Power at 70 mph
2024 Kia EV9 Land 270 mi 35 hp
+Yakima Roof Box 253 mi 38 hp
+Mountain Bikes 250 mi 38 hp
+Modern Buggy Camper 119 mi 80 hp
+Camper, Bikes, Roof Box 113 mi 84 hp
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