Add one car, and what sources over months provide that marginal increase in electricity consumption?
For example incorrect sibling comment:
> ~40% of electricity at this point is renewable
Wrong because the renewable sources are usually already used by existing electricity customers. E.g. in New Zealand at times if there is extra consumption on the network we sometimes start up our one coal station! The extra load uses coal as a source. Or if we have a dry year, our lakes provide less electricity so the extra load is often supplied by gas. We are installing new wind and solar but very slowly. I have a friend working to get a solar farm installed - but government red tape is causing problems (Labour not interested, and National seems uninterested) How can governments screw shit up so much!