In the USA, KIA says that towing is not "recommended", but it is also not forbidden. KIA owners say that their warranties have been honored even with transmission problems.
In Europe, KIA recommends towing being limited to 550 kg/1212lbs with no brakes and 1300kgs/2866lbs with brakes.
UPDATE...
Climate controls can have a big effect.
Use the seat and steering wheel warmers to keep the miles per kW up.
Batteries can loose efficiency in colder weather.
I can get 5.4 to 5.7 around town and 5.0 to 5.2 at 55mph.
But with the climate controls on and running 70+mph, she drops right into the...
Math wise the energy is based on weight and speed change and the rate of change has no affect.
In the real world, both the Leaf and KIA get better range with GENTLE acceleration.
In the USA, KIA says that towing is not "recommended", but it is also not forbidden. KIA owners say that their warranties have been honored even with transmission problems.
In Europe, KIA recommends towing being limited to 550 kg/1212lbs with no brakes and 1300kgs/2866lbs with brakes.
UPDATE...