[FooHentai]

Even so there's good, better, best on a spectrum, right? :)

Or is my '80% renewable' point naive? I think i get what you're saying, if I recharge during peak demand times, there's a chance nonrenewables are being used in higher proportions to fulfil my charge. Conversely if I charge during low-demand hours, the odds are higher that peak generation methods are not being employed.

But even more complicated than that, is the kind of renewables. NZ has a ton of hydro, and during certain times of the year they are drawn down for peak demand, so kinda ideal. Then again during times of drought, no can do and non-renewables may be the only thing that can meet demand.

If you're getting super fancy, NZ Transpower publishes live stats for the grid, including proportion of renewables in use at any one time! https://www.transpower.co.nz/power-system-live-data