They regard 30c per litre as the equivalent. I assume that's off peak, unsure on that. $2-30 a litre right now, so up to $2 per litre saving. Yes RUC is the future cost.
Not sure where you found 30c/litre.
Typical petrol car, 7L/100km = $16.10 per 100km = $2415 per 15,000km.
Kona EV, 19.1 kWh/100km = $4.54 per 100km = $682. You might get close to 30c per L equivalent if you only charged at home on a cheap night rate of 11c/kWh. Only traveled at city speeds. Never used fast charger etc.
If two identical cars, an ICE and an EV version, were $40,000 apart, then clearly no deal. Ever.
$43k diference for Kona Elite: https://www.aa.co.nz/cars/buying-a-car/car-buying-guide/new-cars/new-car-prices/hyundai/
Servicing is going to be similar pricing from a dealer on a new car. Let's assume you save $2000 per year, that's 17-21 years to pay back the diference in purchase cost? Yeah nah.
Ok, I stand corrected. However, at 34k-40k to upgrade ICE to EV means that EV is a no go for everyone. Yes, everyone. Some may be napoy to pay a lot of money per year to be green. The option seems to be a nice pre owned for a second car. I imagine that pre owned 73k cars will remain a high priced car still, compared to an ICE. The R+D is recovered we can pay what they really cost to make, which should be little more than the ICE equivalent. (AS EV engine g=has to be MUCH cheaper, but add in batteries)