Battery based electric vehicles of today and tomorrow.

[Grumpycat]

250,000 to 350000 watts chargers. holy crap, how is the power grid supposed to support this.

What makes you think that is hard or even unusual today?

Small stores and restaurants get bigger utility service connections than that.

Besides, you are willingly being suckered into believing the same "gas station" model currently used is appropriate for EVs. But for long distance travel one will charge at 10kW at home during the night when the power grid is greatly underutilized.

If I remember correctly this is a 480kVA installation. If I remember wrong then it is 750kVA. Utility is the big grey cabinet inside the chain link fence. The actual Telsa Superchargers are the white cabinets in the fence. There are (4), each 150kW split between (2) stalls. (8) vehicles could draw 75kW each. Yes, more than 480 kVA, is believed Tesla can throttle the cars if necessary.

 

[MossRoad]

Its not. Enlighten me

The solar panels feed the grid. The grid is your battery. Anything you don't use goes back into the grid. When you want to pull a load that your array cannot handle, you pull from the grid. Like at night, when most people would be charging their car, not during the day, when they are driving the car.

 

[Oaktree]

Solar panels are not used to directly fast charge EV's or power your AC powered TV or frig.

So enlighten us. I would imagine the panels go into an inverter which coverts the DC to AC at whatever voltage the charger requires. A Watt is a Watt. If you need 80A @240V, you will need 800A @ 24 to get the same power (assuming your inverter is 100% efficient, which it isn't). Pretty big array, and that kind of draw for the 8-12 hr the batteries would be charging would require a huge battery bank as a reservoir.

 

[Grumpycat]

Ya right. An ev that needs 50-80 amps to charge. Id like to see an arrey that can output that level of power for 8-12 continuous hours.

Does not.

An EV will charge on whatever you can provide. Many can not accept more than 7.2kW, 30A at 240V. All Teslas can usefully charge at 10A on 120V. Believe the Fiat 500e could only charge on 120V. Friend had one and a 120V EVSE was all that was provided, all he ever used. It probably would have worked with a public 240V J1772, but many of those are only 208V. The EV will make do with whatever it is given.

The EV that can accept up to 80A at 240V is rare. Was a $3500 option on early Tesla Model S. In recent years up to 72A is standard AC input on S and X. Some 3 and Y can take 48A. Some were limited to 32A at 240V.

All Teslas can accept at least 300A at 400VDC. Very early Model S would only do 90kW, or 225A. The vehicle negotiates with the Supercharger as to what it wants vs what is available.

 

[Gale Hawkins]

So enlighten us. I would imagine the panels go into an inverter which coverts the DC to AC at whatever voltage the charger requires. A Watt is a Watt. If you need 80A @240V, you will need 800A @ 24 to get the same power (assuming your inverter is 100% efficient, which it isn't). Pretty big array, and that kind of draw for the 8-12 hr the batteries would be charging would require a huge battery bank as a reservoir.

Good question. Based on my $149 Harbor Freight solar panel system that's still in the box that was a home schooling project that never got out of the box thanks to good YouTube training on the subject typically solar panels mainly exist to power an energy storage device which with our HF system is a 12 battery.

Since the F150 Lighting is currently a fictional product without defined battery kWH size the charging needs are not known.

 

[Grumpycat]

Since the F150 Lighting is currently a fictional product without defined battery kWH size the charging needs are not known.

Charging needs are not really dependent on battery size. We have 2 data points from published articles:

1) 80A at 240V places 30 miles of range in the battery per hour.

2) 150kW DC charger will put 54 miles of range in the battery in 10 minutes. Another said 200 miles in 41 minutes which I find even more amazing as the rate could not have tapered much as the battery SOC increased.

One has 0.64kW/mile, the other 0.463kW/mile. The 300 mile battery must be at least 140kWh, maybe 200kWh, assuming 100% charging efficiency. Battery capacity is only an interesting data point. Performance is all that matters. The 2 points above define what one must put in, "300 miles" is what one gets out. Stuff in the middle doesn't matter.

 

[Grumpycat]

California's PG&E pays retail minus various operating expenses until parity - if you send more into the grid than you pull, they pay peanuts.
(Guessing CA qualifies as "marxist" in your version of reality)

Yes, what else would you call a government controlled economy? Price is what the government says.

Environmentalists love the word "sustainable" but there is nothing sustainable about providing electricity if one is forced to purchase electricity at price greater than what one can get it elsewhere. If allowed to continue without bounds the utility will go bankrupt.

Tell you what: I'll grow hay and you will have to buy it from me at the same price you sell hay to others. You get nothing for carrying my hay to other customers. Nothing for the shed to store hay. Then when I need hay I'll buy yours for the same price as you paid me.

 

[Gale Hawkins]

BYD may be the best EV maker in the world now and later.

 

[Larry Caldwell]

You absolutely do not want solar on the roof if there is any place to put it on the ground. PV panels are heavy. Roof mount greatly complicates. Means the PV panels have to be removed to re-shingle the roof.

I have a south facing rock slope about 100 x 400 that would be perfect for a solar installation. I don't know if I could sell the power. I'm the last house on the power line - it stops at my mailbox - and I suspect it's only a 5kv. primary.

 

[goeduck]

I have a south facing rock slope about 100 x 400 that would be perfect for a solar installation. I don't know if I could sell the power. I'm the last house on the power line - it stops at my mailbox - and I suspect it's only a 5kv. primary.

Why would it matter if your excess goes back into the grid?