Day 7: What Granny Charging an EV for 475 Miles Looks Like.

Пікірлер: 12

  • @davidmurphy563
    @davidmurphy5636 ай бұрын

    475 miles a week is over double the average mileage. Plus in the US you only get 120V, I'm guessing at 13A like here. Just a kW or so... Think you're asking a bit much of the socket... Why don't you fit yourself a 7kW charger? Do you get 3 phase in the US? You can do 21kW and have it charged in 3 hours. I bought one and had it installed for about 800 usd. I only use it occasionally but it's good to have. But then my plug charger is twice as fast as yours - although I only get a few hours on the overnight rate and just do 15k miles a year.

  • @BobPaul

    @BobPaul

    6 ай бұрын

    Residential in the USA is single phase 240v. The center tap on the load side of the transformer goes to the ground, which results in two 120v lines (180° out of phase) feeding the panel. Commercial often gets 3 phase, but almost never residential. So 12kW is pretty much the max for a home charger and 7.2kW is common.

  • @davidmurphy563

    @davidmurphy563

    6 ай бұрын

    @@BobPaul Ah, I see. So effectively you have 2 x 120 to draw from but they're out of phase. So what, you have two sides to your fuse board? Still, you get the power to the house but at a safer voltage. Less than 5% of homes this side of the pond are three phase but you have the option. No reason why he can't fit a 7kW charger then.

  • @BobPaul

    @BobPaul

    6 ай бұрын

    @@davidmurphy563 that's right. So our "240v breakers" are a double-pole breakers spanning 2 slots and our "240v" receptacles have 2 hots, a ground, and a neutral. 240/50 receptacles are common for ovens. 240/30 are common for dryers. Over time it'll probably be common to have one or the other pre-installed in garages. But now that everyone is switching to NACS, maybe they'll skip the plug and just come with a wall mounted charger. That's probably a bit safer.

  • @davidmurphy563

    @davidmurphy563

    6 ай бұрын

    @@BobPaul Makes sense. There are clear safety advantages at the cost of a little extra inconvenience in supplying high power appliances. That said, you have less safety at the plug/socket in terms of fuse and ground (at least it looks that way from afar) so I'm not convinced you come out on top in the comparison. A kW and change can give you a very bad day. Might be just bias on my part though, tendency to favour what you know.

  • @BobPaul

    @BobPaul

    6 ай бұрын

    @@davidmurphy563 Our primary outlets are 120v either 15a or 20a. I think the ring circuits in the UK with the fuse in the plug are interesting, but a fuse won't prevent electrocution; those are really only there to prevent fire. I do agree on-device fuse (plug is a good spot) is superior; most devices aren't 15a devices. The panel should protect the home wiring and the device should protect itself. That's smart. I like the power switch and safety shutter on the receptacles, too. All around well thought out. But when we think about human safety, that really comes from GFCI, which we have in kitchens, bathrooms, and now they're required in garages. Those trip at only 5mA and quickly enough to prevent electrocution. I assume you have that, too.

  • @NiftyShifty1
    @NiftyShifty16 ай бұрын

    So what vehicle do you really use for transportation?

  • @masterofmetaphors

    @masterofmetaphors

    6 ай бұрын

    If it ain’t diesel it ain’t shit

  • @julianhampton8799
    @julianhampton87996 ай бұрын

    Nope

  • @chargeeverywhere

    @chargeeverywhere

    6 ай бұрын

    Well said.

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