Time to go Electric

There are definitely mainstream EV's that are capable of this, though you'd want some ability to charge at work as 400km at motorway speeds will be far too close to comfort even for cars rated at 500km+.

However it does seem like you are doing an utterly excessive commute. Do you mind me asking what it is you do?

400km for work. Nope. Bigger long term issues there than diesel prices. That's not a sustainable commute.

Well with that commute they should install a charger for you, that would make an EV workable. I think I didnt spend 800 euro in the year with insurance, tax and electricity last year in a model 3. 8800 a year in fuel and then tax, insurance and service....that must be an alluring job to spend that money and 4 hours a days commuting...

I've an ID.4 with the 77kWh battery, it can make it from Dublin to Waterford on a summers day without a recharge, which is around 400km total, mostly motorway

So there are cars out there which will do the job. In winter you'll likely need a recharge. Depending on your route, this can vary from reasonably well serviced to non existent. I'd say at 10-15 mins charge would be enough even in winter. Enough time for a bathroom break and to grab a coffee

As others said, if you can get a work charger then you'll be sorted, no need for midpoint charges. Or if there's a public AC charger nearby you can use that

If there's Tesla superchargers en route then I'd seriously consider a Tesla Model 3 long range. They have the best charging network, hands down. If I was regularly needing fast charging then that's the only brand I'd consider

Also, I'd highly recommend getting a car with some sort of lane following system, as well as adaptive cruise control. They have different names for it, Tesla call it autopilot, VW call it Travel assist, etc. It seriously makes the motorway driving a lot easier

The ID.3 tour is more efficient than any of the other 77 kWh battery VAG cars. My GOM is 440 km with a lot of motorway driving. It would be very close for comfort. But if you could make it work you’d save a packet. Even a granny charge at work might get you a bit of buffer.

For 400km motorway you are still waiting on a bigger battery I think. You will need near to 650km range to achieve your commute.

But your savings would be amazing bar the purchase of a likely 60k plus new car....

Well, it depends on your perspective somewhat

Let's say owning an EV added 15 mins to your commute every day. That's pretty worst case since half the year you won't need to recharge en route, and you might not need 15 mins of charging

Over a month that works out as 5 extra hours, assuming 20 workdays a month

Compared to diesel, you should save around 600-700 a month. Even more if you can get free work charging

So those 5 hours extra will save you 600 euro. As a general rule, a money saving idea is only good if it works out better than your current salary. Unless you're very highly paid (if so, by a Tesla model S) then you will end up better off financially

Of course, the trade off is potentially making an already long commute longer. It isn't an easy trade off, so it's well worth exploring all the options like getting a work charger, seeing what chargers are along the route and getting an idea of what car you might like

Anyway, I wouldn't give up just yet. Yes, you're an extreme case, but there are others with similarly long commutes who have gone electric and enjoyed the experience

I did 250 km today and I’m cream crackered. That’s some commute you have. I’d rent a room!