Thank you again Gary for your informations.
I'm studying automotive engineering at Turin Polytechnic (an English course, btw
I'm asking because I have to make a program in matlab to estimate the thermal power required to heat the cabin of an electrical car in order to study the use of insulant materials. My program currently estimates that to heat to the temperature of 15°C in 15 minutes the cabin of a small (smart-like) car left outside at 0°C approximately 2500 W are required.
I wanted to know if this value is lose to reality to validate my model, this is why I was asking about the power of the heater of the Leaf. Now I will try to input some datas about the Leaf and check if my work is correct or if I have to improve my programming skills other than my english language ones