Also very important: the cybertruck is not the only vehicle capable of doing that (the keywords are V2H and V2L, V2H is the more convenient — the car just plugs into the mains and acts as a house battery — while V2L means you have to go and plug your stuff to the car's mains outputs directly)
> Most of the disasters I'm aware of people either get their power back in a short enough amount of time that they can use a normal generator for the gap
TBF an EV car has an absolutely massive battery relative to the electric consumption of a house, unless you're using resistive heating all around. Especially if you ration use.
Here's Alex from Technology Connections testing powering things in his house from his Hyundai Ioniq 5.
https://youtu.be/yO5fJ8z66Z8
I live in an area prone to high winds and we occasionally have pre-planned power shutdowns (I think PSPS is the term).
My Ioniq 5 has been a godsend. No, it can't power the house without dorking around with my electrical panel. But we can run the fridge, dishwasher, a few standing lights and keep phones and computers full charged.
I used a similar setup to Alex's but with the outlet in the rear seat instead of the V2X connector. I will probably by the V2X connector since it supposedly hanldles higher power draw.
I can’t imagine using a dishwasher with limited power?
I barely use mine with unlimited power. Unless I’m hosting dinner for 20.
It’s only me and my partner and we run it every single day. To be fair we both work from home so we generate more dishes than two people that go to work I suppose but I just hate doing them by hand
You don’t have to make excuses, modern dishwashers are really water and power efficient.
I think a really in-depth look at how people use dishwashers would be pretty interesting. There are a lot of surprisingly strong opinions about right ways to do it. Of course knowing the right way is also interesting, but how people came to be so convinced that their way was the right way would be even more interesting to me-- I suspect there are a lot of hidden generational and socioeconomic attitudes hidden in there.
Is that the new PlayStation?
TIL about his extra's channel, thanks!
We have a heat pump with SOCP 5, but are still using 30kWh per day now.
That's 2-3 days worth without changing your use pattern, which surely you would do if you expected a long blackout period?
On most modern EVs, that's at least 3 days worth of power if the vehicle is not being driven. Larger vehicles naturally have far larger batteries.
Mmmh no? 90kWh battery packs are not that common. An M3 or MY LR AWD have an 82kWh. Some Mercedes and some Chinese model have a 100+kWh battery but the most common setup is between 60 and 70.
Anyway I agree that in emergency conditions it can go a looong way for a house.
My bmw has 108
Is that 30 kW each hour of the day or 30 kW per day?
30 kWh per day, while a clunky unit, is what most people would understand when talking about home consumption. It’ll be what their utility typically reports, how you’d want to size a battery, etc.
Sort of neither?
It's 30kW for one hour.
(Or 1.25kW for 24 hours, or however you prefer).
[Link: https://en.wikipedia.org/wiki/Kilowatt-hour]
It's like you had a faucet with cross section of 2 square inches, and 15 seconds with that faucet wide open would fill a jug. That jug holds 30 squareinches-seconds of water.
You may then use that water over the course of a day. That's 30 sqin-sec per day. That is not 30 square inches for a whole day. It's second per day.
Or watt hour per week or whatever.
Yes, it can be described like 0.00034722 sqin/day, and that corresponds to no physical object and that would be largely useless.
Why not Joules or Liters? Because that's complicated for anything electrical.
Pretty sure GP understands that, their point being you can't just wave away 'per unit time' when talking about it relative to generation, it matters.
"30kW per day" makes no sense. It's like saying "100km/h per day". W is a unit of power, Wh is a unit of energy.
It's unintuitive because a guy named Watt decided "Joule per second" is Watt, so the intuitive units Joule and Joule per second got turned on their head to W times hour and Watt. This is opposite to usual intuition of distance and speed for example, km and km/h. If I redefined the km/h to a "tick", then a km would become "tick times hour".
If you want a "better than nothing" but imperfect analogy, Wh is how much water you have in a bottle, and W is how quickly you can get the water out.
The naming of the unit is posthumous
And yet all utilities of the world decided to use kWh as the thing to measure. Also basically all smart measurement devices settled on this being the default to show. Exactly in the way he used it here, kw per day, kw per week, kw per month, kw per year.
This discussion seems super silly, considering he's just using the measurement that the industry adopted decades ago...
Are y'all just coming out of a time travel device from the 70s or something?
"30kWh per day" isn't waving away anything.
30kW is a rate.
30kWh is a measure of energy, about 100MJ.
30kWh/day is a rate again, 100MJ/day.
It seems clunky, but it's a way energy usage in a house is typically measured.
Wh is a unit of energy. They're saying how much energy they consume per day.
No, their point is wrong either way and there is no way to steel man it without saying the comment is extremely poorly articulated.
30kWh is 1.25kW for 24 hours or 30kW for one hour.
30kW every hour means 720kWh per day. 30kW all day is also 720kWh per day.
The comment is nonsense.
The only way you can steel man it is by saying he isn't concerned about the 1.25kW, he is concerned about the swings, but he said 30kW twice for two different time spans so that can't be it either.
As soon as the Rivian has v2h I will buy
The value of a used 24 KWh battery used in, say, an old EV non-tesla car - $2000 (note this still has plenty of life left). Example: a 2013 Nissan Leaf
The value of the same, repurposed to a "powerwall" - $10k per 10 KWh
The value of it once attached to a "movable powerwall" - :) add a few more zeros
Clearly, I am in the wrong business...
You can get good batteries for a lot cheaper than a power wall. Just like when the Tesla family of companies tried to do home solar - big premium for the name.
This puzzles me.
When we got solar we asked for quotes, but ‘No Tesla’. The sales rep said ‘We get that a lot’.
Haha, I’m actually in process of installing a home solar setup. That’s exactly what I told the installers too.
I wasn’t interested in hearing any advantages of a Tesla Powerwall, that brand is toxic to me now.
There’s plenty of good alternatives that don’t fund criminals like Tommy Robinson and Russell Brand.
What did you go with?
We have Sigenergy. Are they better than Teslas? Unsure, but at least I have no idea what the owner(s) think.
I knew a guy with a Tesla solar system and his advice was also “no Tesla”
Batteries are cheap, an unsafe installation burning your house down, extremely expensive.
Best practice would be to build a separate structure and physically separate the battery from your house.