Electric cars?

[Value Collector]

So do I, however try and tell that to the climate zealots and they will chase you out of the room.

Like always it’s best to ignore the zealots on either side of politics.

 

[sptrawler]

As long as the charging is mostly happening over night, when the distribution system is laying idle, it would actually be good for the grid in general.

Also, having a bunch of Ev's in your area charging during the day would assist your local grid in dealing with your solar export problem, because the reason they are limiting your exports is so as not to over load the grid, the more demand in your area the more solar it can absorb.

Back to where we first started and the current state of play. I stated eventually it will get sorted.


The other issue is whether the distribution system is up to the load requirements, on a lot of high density areas, the suburb distribution system will require upgrading.

As an example, I want to upgrade the solar on our free standing unit, the electrical supply authority have stipulated an export limiting device has to be fitted, so that only 3kW max can be put back into the system.

This will be a problem for many groups of units, or higher density areas, I could go into maximum demand designed distribition, but in short a lot of suburban distribution isn't set up for high EV usage and demand.
It will get sorted, but I would guess the distribution companies are happy with the slow take up of EV's

 

[Value Collector]

Back to where we first started and the current state of play. I stated eventually it will get sorted.


The other issue is whether the distribution system is up to the load requirements, on a lot of high density areas, the suburb distribution system will require upgrading.

As an example, I want to upgrade the solar on our free standing unit, the electrical supply authority have stipulated an export limiting device has to be fitted, so that only 3kW max can be put back into the system.

This will be a problem for many groups of units, or higher density areas, I could go into maximum demand designed distribition, but in short a lot of suburban distribution isn't set up for high EV usage and demand.
It will get sorted, but I would guess the distribution companies are happy with the slow take up of EV's

Charging an ev can use less power than air conditioning, I feel if it’s timed right, the distribution system is up to it.

You can link up to 21 Tesla chargers together, set load limits, and the chargers will intelligently manage the load between the chargers to make sure the max load isn’t reached. Eg if all 21 chargers are being used each one gets 1.5 KWH, but as each car hits 100% the charging rate of the other cars increases.

 

[sptrawler]

Charging an ev can use less power than air conditioning, I feel if it’s timed right, the distribution system is up to it.

You can link up to 21 Tesla chargers together, set load limits, and the chargers will intelligently manage the load between the chargers to make sure the max load isn’t reached. Eg if all 21 chargers are being used each one gets 1.5 KWH, but as each car hits 100% the charging rate of the other cars increases.

If you have a group of 15 units with a 100amp common distribution board and each unit puts on 6.6kW of solar and also 15 x 7kW chargers, there is going to be a problem.
Now if there are 10 such complexes in the street, the problem compounds, then if there are 30 similar streets in the suburb the problem increases exponentially.
The distribution system has to be reconfigured, supplies have to upgraded, transformers have to be upgraded and in most cases changed to auto tap changing.
It has very little to do with gas turbines.

 

[Value Collector]

1. If you have a group of 15 units with a 100amp common distribution board and each unit puts on 6.6kW of solar and also 15 x 7kW chargers, there is going to be a problem.

I would expect every unit to be maximising out their solar, and as I said you can have all the car chargers talking to each other to keep the load within what every the circuit limits are. Tesla chargers come with this feature out of the box for homes with multiple chargers, and you can link up to 21 chargers, and thats just the standard base model Tesla home charger. I am sure even more complex systems can be designed.

Now if there are 10 such complexes in the street, the problem compounds, then if there are 30 similar streets in the suburb the problem increases exponentially.
The distribution system has to be reconfigured, supplies have to upgraded, transformers have to be upgraded and in most cases changed to auto tap changing.
It has very little to do with gas turbines.

I don't think it is as big a problem as you seem to think, I mean the distribution grid already delivers huge loads during peak hours, as long as these limits aren't exceeded, then off-peak charging would be fine, at 10pm at night everybody's hot water systems switch on, and the grid load continues dropping, 2 hours later the hot water systems are all switched off and there is huge spare capacity.

 

[sptrawler]

I would expect every unit to be maximising out their solar, and as I said you can have all the car chargers talking to each other to keep the load within what every the circuit limits are. Tesla chargers come with this feature out of the box for homes with multiple chargers, and you can link up to 21 chargers, and thats just the standard base model Tesla home charger. I am sure even more complex systems can be designed.

I don't think it is as big a problem as you seem to think, I mean the distribution grid already delivers huge loads during peak hours, as long as these limits aren't exceeded, then off-peak charging would be fine, at 10pm at night everybody's hot water systems switch on, and the grid load continues dropping, 2 hours later the hot water systems are all switched off and there is huge spare capacity.

Obviously you don't have an electrical backgound and EV's aren't yet talking to each other, V2G is still in its infancy.
I have never mentioned single homes on a dedicted supply, I was talking about high density unit developments that currently exist, that have a common supply point as most do.

Complex systems are and will be designed, as I said previously.
With regard hot water, it would be better to switch them on at mid day when solar is currently curtailed, rather than at 10 at night when the system is relying on fossil fuel or batteries. Again it shows your lack of understanding of the grid.

Also as I said previously, the supply authorities will be happy that the EV take up rate is quite modest, so that the distribution system can be adapted.
The distribution system at the domestic level, is designed for one way flow and modest demand, air con and stoves don't draw constant current for extended periods and not all units have electric stoves, air conditioners and EV's.
Currently a lot use gas stoves, gas heating and petrol/diesel cars, so the demand is low.

You seem to way too focused on the finish line, rather than the present, or too focused on winning a discussion at any cost. Lol also not everyone wants a Tesla.

 

[Value Collector]

1. Obviously you don't have an electrical backgound and EV's aren't yet talking to each other, V2G is still in its infancy.
I have never mentioned single homes on a dedicted supply, I was talking about high density unit developments that currently exist, that have a common supply point as most do.


2. With regard hot water, it would be better to switch them on at mid day when solar is currently curtailed, rather than at 10 at night when the system is relying on fossil fuel or batteries. Again it shows your lack of understanding of the grid.

3. Also as I said previously, the supply authorities will be happy that the EV take up rate is quite modest, so that the distribution system can be adapted.
The distribution system at the domestic level, is designed for one way flow and modest demand, air con and stoves don't draw constant current for extended periods and not all units have electric stoves, air conditioners and EV's.
Currently a lot use gas stoves, gas heating and petrol/diesel cars, so the demand is low.

You seem to way too focused on the finish line, rather than the present, or too focused on winning a discussion at any cost. Lol also not everyone wants a Tesla.

1. I don’t think you are reading my posts correctly… Tesla charger CAN and Do talk to each other already , and can be set up to limit total load, as I said 21 chargers can be linked together and talk to each other wirelessly.

2. Hot water systems are on during the middle of the day, as would EV charging, offpeak hot water system hours in my area are from 10pm to 3pm (19 hours of the day). But as I said they aren’t running all day because most people would have a shower when they get home from work and the hot water would re heat before midnight.

3. Yeah, and my opinion is that if the distribution system already handles the high peak loads, then charging offpeak shouldn’t be a problem.

 

[sptrawler]

1. I don’t think you are reading my posts correctly… Tesla charger CAN and Do talk to each other already , and can be set up to limit total load, as I said 21 chargers can be linked together and talk to each other.

Not everyone has a Tesla and many buy different chargers. A person can fit a 32 amp 3pin outlet and run a 7kW portable charger if they want to.

2. Hot water systems are on during the middle of the day, as would EV charging, offpeak hot water system hours in my area are from 10pm to 3pm (19 hours of the day). But as I said they aren’t running all day because most people would have a shower when they get home from work and the hot water would re heat before midnight.

You said everyone's hot heater switch on at 10pm and switch off 2hrs later and the load keeps dropping, let's be honest you have no idea.
So when I explain it would be better to put them on at midday to reduce solar curtailment, you change your story. Lol your post #10,165 above.

3. Yeah, and my opinion is that if the distribution system already handles the high peak loads, then charging offpeak shouldn’t be a problem.

The distribution system is designed for one way flow, from the power station to the load, it is currently trying to adapt to bi directional flow, where at low load times solar inflow raises the voltage at the street level. This causes serious problems for domestic appliances and the local distribution transformers have to deal with it.

Also with the change over to all electric domestic appliances(no gas), the maximum demand on the consumer mains is increasing.

Add to that the extra consumer mains demand of a 7kW EV charger per connection the peak load at the consumer connection will be considerably higher.