Transitioning from a Commodore to an EV

[StrayKiwi]

Have you noticed any changes in the efficiency of the batteries so far? While it is reasonable to expect that the total battery capacity will slowly decline over time, what about the mileage in terms of kwh/100km?

 

[Paul Smedley]

Have you noticed any changes in the efficiency of the batteries so far? While it is reasonable to expect that the total battery capacity will slowly decline over time, what about the mileage in terms of kwh/100km?

No change at this point. Without going to the cars to check, last time I looked, the Model 3 was sitting at around 130 Wh/km and the Model Y around 140 Wh/km. The biggest impact to this is the speed you're driving - at 100km/h the consumption will be higher than at 60km/h (for example).

 

[Aus78Formula]

Transitioning to an EV? Is that like coming out?

 

[krusing]

Range doesn't bother us - our holiday house is ~50km away and we installed a 32A socket down there as well. 500km range is similar to the ZB - but a damn site cheaper to charge.

Average fill on the ZB is $80 - and probably for 3/4 tank.

Assuning the 60 kWh battery on the M3 is completely empty:
Charging on solar - forgoing $0.10/kWh FIT - $6 to charge
Charging using offpeak power - $0.25/kWh - $15 to charge
Charging using peak power - $0.40/kWh - $25 to charge

The Tesla UMC (which is no longer included with vehicles, I just scraped in to get one included) comes by default with a 10A and 15A tail. There is an aftermarket 32A which uses a 32A 3 pin or 32A 5 pin single phase socket for charging.

It cost me about $200 for the tail and $400 for the sparky to isntall the socket.

With the 32A tail, charging time from empty is ~ 8 hrs - ie overnight.

We could have probably gotten by with the 10A - but it's nearly 24hrs for a full charge - which is inconvenient.

Superchargers are MUCH faster.

Gratuitous car collection photo attached.

What current does that draw for the 8 hours charging ?
How much current does it draw on standby for 16 hours ?
Calculate that for 365 days @ the current cost per kw/h,
And that would be on a day rate,
Imagine the quarterly power bill.

With all the extras load on the grid,
And power stations shutting down,
There will be more blackouts/brownouts and more house fires.

 

[Paul Smedley]

What current does that draw for the 8 hours charging ?
How much current does it draw on standby for 16 hours ?
Calculate that for 365 days @ the current cost per kw/h,
And that would be on a day rate,
Imagine the quarterly power bill.

With all the extras load on the grid,
And power stations shutting down,
There will be more blackouts/brownouts and more house fires.

How much current do you think a 32A charger would draw whilst it's charging? Hint: it's 32A

It draws 0 when were not charging as it's turned off at an isolation switch.

My monthly power bill is around $60 including charging 2 EVs and having reverse cycle air con.

Stop watching sky news and reading Murdoch newspapers and you'll be less concerned about the power grid failing. There are plenty of renewables and grid storage coming online. Time of use tariffs incentivise power consumption when grid prices are low. My aim is to charge when the grid price is less than 5c/kWh.

 

[krusing]

How much current do you think a 32A charger would draw whilst it's charging? Hint: it's 32A

It draws 0 when were not charging as it's turned off at an isolation switch.

My monthly power bill is around $60 including charging 2 EVs and having reverse cycle air con.

Stop watching sky news and reading Murdoch newspapers and you'll be less concerned about the power grid failing. There are plenty of renewables and grid storage coming online. Time of use tariffs incentivise power consumption when grid prices are low. My aim is to charge when the grid price is less than 5c/kWh.

I don’t have sky news,
And don’t read newspapers.
So don’t assume we all watch and read BS

I am using plain and simple electrical facts from the electrical trade.
If you don’t understand the way electrical things work connected to a supply, don’t make out you know by BS that has been thrown at you.

Don’t have to be a smart arse, with a “Hint”,
If your chargers are drawing 32amps, for 8 hours, you have a issue.

If you have a isolator,
where is the isolator located ?
On the wall,
Or
On the unit ?

 

[krusing]

The question was -

How much current do the units draw while charging?
And
How much currency do the units draw while on standby ?

Have you physically tested it ?

 

[krusing]

So your “Hint” is 32 amps,
Is that rating on the -
Primary side
Or
Secondary side ?

 

[krusing]

As your “hint” suggested @ 32 amps,
And if it’s drawing 32 amps for 8 hours a day charging on a day rate.
Based on say 30c per kw/h.
My calculations equate to the attached image.based on a month.
That’s a little bit more than $60 a month.

 

[krusing]

My aim is to charge when the grid price is less than 5c/kWh.

So you will only charge your cars @ 5c kw/h.
What days of the week is it that price ?

At the price, doesn’t sound like they will get charged to often.