Business Use and Novated Leasing

Looking into Novated Leasing for an EV and was wondering if someone can provide some info on what difference it makes if you use the car for business purposes? For my petrol car, I maintain a logbook and use the cents per km method for tax deductions. Obviously can’t do that with the EV but what options do I have? Can I continue using the petrol car and use the EV just for private purposes?

Lastly, does it impact the NL payments if I use it for business purposes?