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Diesel generator + Tesla vs Diesel car

Posted: Mon, 12 Feb 2018, 08:58
by jonescg


Brought to you by the AEVA :)

Only thing worth doing now is to see how much diesel is required to recharge the car to the same SOC (which is hard to do).

Re: Diesel generator + Tesla vs Diesel car

Posted: Mon, 12 Feb 2018, 13:13
by Rusdy
I'm a bit lost. So 18kWh added to cover exactly the 104km distance? Was that pre-calculated so that the Tesla use 18kWh per 100km?

Re: Diesel generator + Tesla vs Diesel car

Posted: Mon, 12 Feb 2018, 13:35
by jonescg
I think that was the intention. However from what Rob told me the driving conditions were near perfect, and both vehicles were using very little energy. They'd averaged 145 Wh/km even when driving at 110 km/h everywhere, so that 18 kWh wasn't used entirely.

It would be difficult to recharge the car to exactly the same point, because that point is somewhat fluid. If you recharge to 100% full you will use additional energy in cell balancing etc.

Maybe the next test is to effectively range-test the vehicle, with a generator nearby to provide the 5-hour full charge. Based on 266 ml/kWh that should require about 23 litres of diesel.

Re: Diesel generator + Tesla vs Diesel car

Posted: Mon, 12 Feb 2018, 16:13
by Rusdy
jonescg wrote:
Mon, 12 Feb 2018, 13:35
...They'd averaged 145 Wh/km even when driving at 110 km/h everywhere, so that 18 kWh wasn't used entirely.

...
Ah, that's more like it. I didn't expect Tesla is that 'inefficient'.

What I didn't expect, how efficient diesel genset is. Converting 4.4 litre of diesel (around 44kWh of contained energy) to 18kWh translates to 40-ish percent energy conversion. That is pretty damn good.

So, from me the pedantic 8-) , the correct diesel equivalent for the Tesla would be 3.7 litres then.

Re: Diesel generator + Tesla vs Diesel car

Posted: Mon, 12 Feb 2018, 18:36
by weber
Now can we see how far the diesel runs on sunshine?

Re: Diesel generator + Tesla vs Diesel car

Posted: Tue, 13 Feb 2018, 09:45
by Rusdy
weber wrote:
Mon, 12 Feb 2018, 18:36
Now can we see how far the diesel runs on sunshine?
My guess is 400-ish km. Sunshine --> Model X --> Diesel on Trailer.

Drag race it meanwhile you're at it. Please!

Re: Diesel generator + Tesla vs Diesel car

Posted: Tue, 13 Feb 2018, 12:33
by Richo
TBH non-eV people would see this as 0.4L/100km of convenience to fill up a diesel car wheneva and whereva with more range.
Really who could be bothered to save 55c/100km for all that electric car hassle?
Just looking at it from the other side of the coin.
weber wrote:
Mon, 12 Feb 2018, 18:36
Now can we see how far the diesel runs on sunshine?
Diesel was sunshine once right?!? :)
:lol:

Just jokin

Re: Diesel generator + Tesla vs Diesel car

Posted: Mon, 26 Mar 2018, 14:04
by offgridQLD
That's what I have noticed now that I am (temporarily) paying for grid power at 40c KWH our Imiev is about the same running cost as a 5lt /100km diesel car at $1.40 lt fuel cost.

That said the drivability of a EV wins hands down without $ savings or pollution benefits.

Re: Diesel generator + Tesla vs Diesel car

Posted: Mon, 26 Mar 2018, 14:17
by offgridQLD
What I didn't expect, how efficient diesel genset is. Converting 4.4 litre of diesel (around 44kWh of contained energy) to 18kWh translates to 40-ish percent energy conversion. That is pretty damn good.

I was thinking the same. Particularly if that's 18kwh into the Tesla battery. As it would have needed to produced more than 18kwh before charging losses. 4.4lt at $1.40lt for 18kwh = 34cent KWH less than grid power in SA :lol:

Re: Diesel generator + Tesla vs Diesel car

Posted: Mon, 26 Mar 2018, 17:20
by antiscab
Why is power costing you 40c /kwh?

Re: Diesel generator + Tesla vs Diesel car

Posted: Mon, 26 Mar 2018, 17:40
by Adverse Effects
antiscab wrote:
Mon, 26 Mar 2018, 17:20
Why is power costing you 40c /kwh?
that is close to what i pay on the south side of brizzy as well