To save $9,000 in a year you would need to do around 45,000 km ($2 a litre, 10 litres per 100 km), that’s a hell of a lot if driving. A Model Y Long Range uses around 150 Wh/km (combined cycle) and has a 75 kWh 4680 NMC battery which means for 45,000 km charging 10% to 80% (Tesla recommendation) you would have recharged it 430 times. That’s more than once every day (1.2 times in fact) using an 11 kWh Tesla home charger it would take more than 5 hours to recharge once from 10% to 80%.
To do 45,000 km in a year it won’t be parked much during the daytime so recharging would mostly be done at night. Which means a home battery and recharging overnight. The largest Tesla home battery is 13.5 KWh and to recharge a 75 kWh Model Y battery 10% to 80% overnight would take 4 X Tesla Power Walls, at $13k each that‘s $52k.
To recharge 4 x Power Walls during the daytime, to give enough capacity to charge the Model Y 10% to 80% in winter, would need a solar system around 40 kWh. Cost around $40k.
The above doesn’t allow for electricity to run the house, that‘s just for recharging the Model Y at a cost of $92k. At $9k per year in fuel savings that’s 10.2 years pay back on solar panels and batteries that are warrantied for 10 years, risky.
Of course the above allows for 1 charge per day, but the Model Y would need 1.2 times per day average. I’m not sure how to go about that, going home in the middle of the day to top up for an hour or more or recharging at a Tesla fast changing station, which costs close to same (up to 85 cents per kWh) as buying petrol (per km travelled).
Surely I must be missing something here?
Always a Bulldog
What ecoshit box does 10L/100km? My Raptor is around 15L on Premium and our SQ5 was around the same also on 98, so you can cut the figure in 1/3 again and re run those numbers for any luxury car.
We don't have a long range so Tesla recommend charging to 100% (new battery tech) compared to the long range.
My partner works from home full time, she does the vast majority of her driving dropping kids off and picking them up in the morning and afternoon or visiting the office when she has to before coming home.
These trips are 1 hr trips each time so 2.5 hours of driving a day just for the kids not allowing anything else, we also run an Airbnb 2 hours away that is a 4 hour round trip we attend twice a week, the car charges in peak solar times 99% of the time it falls on charging while she works, we have a 30kWh home system (it was $20,000 not $40,000) this generates more than enough that our home bill is also $0 per quarter and covers any night .
Not missing anything instead of just asking how this was possible you've come up with a bizzare scenario in your head to suit yourself where I require $90,000 up front cost to charge this car for free when all that happens is I charge it from the solar that was already installed pre car purchase so a sunk $0 cost.
I love ice cars, you're talking to someone who owns a VL Calais, Honda NSX, HQ panelvan & Jaguar XJ12 as weekend toys.
As a mode of low cost transportation you cannot beat an EV, it's the future and if it doesn't suit you because you cross the Simpsons desert every weekend that's fine for now but people are already road tripping the entirety of Australia in teslas.
(buy your solar panels and inverters from reputable companies also, our panels are 30 years and our inverter 20) a battery doesn't make much sense while we still have 7 cent feed in tariff making up for night usage. On good days we're hitting close to 250kWh generated.
