Why is an EV's backup power less than it's driving power?

HT, 3 phases

---- transformer \---- 120 v (takes one /

---- phase on \---- center, grounded primary) /

---- \---- 120 v

I'm not fully sure of the primary, but the secondary should be correct. It is single phase, with a transformer with a center tap, grounded, which acts as neutral. The two 120 lives are at 180° one from the other.

coal fired power plant, a cement factory and trash incineration

here the price has not increased in 2 years, other citys where the heat is from gas and heat pumps I think the prices have increased 3-4x

What I usually see is three HV wires between poles, and an occasional pole pig between two wires (ie l-l on a 3 phase feed) making the split

Many places have a higher, single, grounded wire to catch lightning bolts. We seldom have lightning here on the west coast to that's rare. It's hilly here too, so lightning will generally hit trees on the peaks.

Commercial feeds can be all sorts of crazy. One common hookup of a medium-size business is the "stinger", 3 phase 240 v l-l, with the ct of one phase neutral to provide 120-n-120. The third line is the one that stings.

Some systems are true three phase, 120 or 240 line-to-neutral, with various single-phase loads rotating among phases. Classicly, the neutral currents should about cancel, so the N wire was as fat as the phase wires.

But electronic loads like PCs started making a bunch of peak currents,

You are correct.

Joe Gwinn

Yes. Some time ago, I published a war story here about the 180-Hz current from a 3-phase system with capacitor-input DC power supplies with diode rectifiers - 3-phase current surges yielded a very healthy

Joe Gwinn

Not necessarily. Depends on where it is, and how grand the houses are in that neighborhood.

That sounds like what I remember.

I do mean a UK kettle. We have expatriates who pine for UK tea.

My dryer has a plug. Electric stoves do as well. This for residences. Eliminates the need for an electrician when it's time to pull stove or dryer out for repair and/or cleaning.

The US functional equivalent to a UK outlet suitable for a tea kettle. would be NEMA Type 6, for 15 or 20 amps.

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A range of +/- 6% seems to be common. 240+6% is 254.4 Vac. 240-6% is

At home, what I'm getting at 8:00 PM Saturday evening is 244 volts and

But this may well cover it:

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See above.

Joe Gwinn

So?

You keep talking about irrelevant points. We were talking about the cost of the connection size. You have somehow conflated that with the monthly bill. I guess you don't understand what I'm talking about. So probably time to give up.

Of course, everything depends on everything, but these days, 200A service is the norm for all but the smallest houses. Do some reading.

Did they bring their UK water with them?

Yes, that's what I said. These sockets will be behind the appliance where no one can get to them since they are not for general use. It seems a bit of a contradiction that we share the feed for 120V outlets, but nothing else. You can overload a 120V line and there's nothing to stop you. But code stops you from sharing a 240V line.

See what? You incorrectly stated the tolerances as ±6% when they are ±5%.

Hmm. Get a life - this is bulk power, not a standards lab.

Joe Gwinn

??? You state an incorrect specification and you seem to be blaming me?

In the UK the model seems to be one EV charger per however many parking spaces in shared facility carparks with only electric vehicles allowed to park in the charging spots and for maximum 90 minutes to charge up.

Certainly the public ones at supermarkets and most (but not quite all) charging hubs are much more expensive than domestic electricity and you seem to need several different charging apps to use them. One of the new promised superhubs has finally opened at York (the other is still waiting to get an electricity supply - you couldn't make it up!).

A few private carparks have the more sensible one charger to serve four spaces configuration but all too often they are one charger per space.

Then people get £60 fines for overstaying their 90 minute charge slot.

The mains fuse and the calibrated meter still have lead seals here. They aren't very convincing at all. Most hacks to steal power seem to consist of copper nails driven through the tails before the meter.

It has been interesting finding out about the details of your system. Every country has a few peculiarities about mains power and telecoms.

Ah.

In our case (in a building of flats) the parking slots are assigned, each one is owned by one single owner (with deed and all), so there can't be sharing of charging spots.

Yes, I heard a bit of that. App nightmare. Travelling, having a charging spot but not the right app/contract.

I see a problem with that. One car charging, another parked and waiting. When the first one finishes, he leaves and another client is fast and parks there; sees the cable not been used and takes it, before the car that was waiting there notices and comes.

Wow.

I know of hacks here, but they seem to be changing the live wires leading to a house, to the meter of a neighbour.

I have not heard of hacking the firmware of the meter. Maybe there is, but I have not heard of it.

Yep :-)

On Monday, 21 November 2022 at 04:16:14 UTC-8, Carlos E.R. wrote: ...

It may not be quite as bad as that - the expensive charging hardware is not at the post itself but usually mounted in equipment racks some distance away and is often shared between two or more charging heads.

... ChargePoint (and maybe other charging providers) deal with that by instituting a five minute period grace period after the cable is replaced where only the person next on the waitlist can unlock and remove the cable and start charging. Authentication is performed by card or phone app.

kw

Do you like being ripped off? $1K

Finally, you understood and answered my question. The difference between 10kW backup mode and 80kW driving mode is sustainability.

You're the one getting mixed up with kW and kWh.

Arrested for using your car battery for something else, yeah right.

And you too, or you would have written them down.

A post can be read and responded to by anyone. When I said "And why do people say it costs tho.....", you didn't seem to know who I was talking to, I can't tell to help you out now, since you snipped the attributions.

But you weren't talking about invertors, you said EVSE.

Because I live cheaply on Chinese stuff. 99p for an 18650 battery charger!

You switch one off while you cook. It's only for the duration of the power outage.

I did no such thing. If you believe I did, show me where I did.