I participate in an online forum for the Mitsubishi I MiEV electric car. There is a debate raging about how the 12V side of the electrical system works. My side is that all accessories like the radio and headlights run off of the 12V battery and is recharged by the DC/DC convertor. This is just like a gas car where all the accessories run off of the 12V battery and the battery is recharged by the alternator. The opposing side says no, this is incorrect. In a gas car all of the accessories run off of the alternator and the 12V battery is only used to start the car and afterwards its totally useless, the same goes for the 12v in the electric car. In the electric car, this opposing side says the accessories are directly hooked up to the DC/DC convertor and the 12V battery is only used to engage the drive system.
I’ve worked on cars and motorcycle for a long time and feel I know how the system works. Are they any experts that can clarify this and explain how the electrical systems work, in either the gas or electric car?