this post was submitted on 11 Jan 2024
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A mother used her EV to power her son’s dialysis machine amid storms and a blackout | Electric vehicles with bidirectional charging can be life-saving, especially in times of power cuts and natural...::Electric vehicles with bidirectional charging can be life-saving, especially in times of power cuts and natural disasters.

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[–] aeronmelon 37 points 11 months ago (3 children)

Forget just cars, cities should have battery stations all over town for whatever emergency reason. During a network outage, they just take your credit card on faith and settle accounts once the bank networks are up again.

[–] lepinkainen 16 points 11 months ago (3 children)

Small scale power generation and storage should be the future.

It’s a fuckton cheaper to have 1000MW batteries than one huge 1GW battery.

Better for reliability too.

[–] RememberTheApollo 11 points 11 months ago (1 children)

Maybe. But you gotta factor in maintenance and replacement costs. There’s a reason consolidation happens, and that’s because it’s cheaper to maintain one big thing with fewer people than to keep a system operational that has lot and lots of little parts.

I agree with you, a distributed system with more failsafes and backups seems like a far better idea for infrastructure continuity and security, but business doesn’t see it that way.

[–] DanglingFury 1 points 11 months ago (1 children)

One answer could be to croudsource it. A mesh network of generative and storage nodes, like someone with solar and a home battery, but large enough to backfeed as needed. Perhaps on an hoa/neighborhood scale. If it could be incentivizes and achieved without undercutting the grid then it could eliminate the need for peaker plants

[–] RememberTheApollo 1 points 11 months ago

That would be helpful, however knowing people they’d unplug their shared car battery and save it because “me first.”

[–] [email protected] 6 points 11 months ago (1 children)

What? No. Economies of scale don't work that way. For example, rooftop residential solar is substantially more expensive than a big field of solar, or putting them on top of large industrial buildings. Labor costs hit residential solar much harder.

[–] [email protected] 1 points 11 months ago

Depends on the grid. If the lines and transformers are already used close to their limit, more smaller buffer batteries and smaller solar installations, closer to the user, could be more efficient and not require grid adjustments. The closet to the user, the less grid adjustments are needed.

Industrial roof solar should be standard in any new building by now. Companies need the power in the day and it can be used without even needing to use the grid.

[–] [email protected] 0 points 11 months ago

It's pretty common in developing countries. Growing up in India, we had frequent power cuts (not too bad as some other places, maybe like 30 mins in a day). So having backup batteries were pretty common. They're called inverters colloquially.

We rarely have power cuts nowadays, but they're still useful during storms and such.

[–] a4ng3l 11 points 11 months ago

If the storm took down the utility pole 3 blocks away you’re not getting city’s batteries to help you through. There’s a certain charm to distributing reasonably the power storage.

[–] topinambour_rex 20 points 11 months ago (1 children)

People use electricity generator in those situations too.

[–] lepinkainen 31 points 11 months ago (2 children)

The difference is that a generator you might use every two years is likely to fail when you need it unless you carefully maintain it regularly.

You use your car every day, you’ll notice if it breaks and take care of it immediately.

[–] kameecoding 5 points 11 months ago (1 children)

You use your car every day

Not everyone lives in North America mate

[–] lepinkainen 6 points 11 months ago

I don’t live in NA either and work from home. I still use my car more often than a theoretical generator

[–] [email protected] 4 points 11 months ago (1 children)

My generator tests itself once a week, automatically cuts over during an outage, and costs ~$200 a year for scheduled maintenance that I can’t be arsed to do anymore at this stage of my life. Generators don’t have to be a huge headache.

[–] lepinkainen 4 points 11 months ago

How much did you pay for a fancy generator like that?

[–] [email protected] 14 points 11 months ago (2 children)

You can do this with a gas car too?

[–] buzz86us 16 points 11 months ago (2 children)

Cigarette lighter plugs don't provide the necessary voltages

[–] Blue_Morpho 13 points 11 months ago (3 children)

You buy a plug in power inverter. That's good for up to 300 watts.

[–] spongebue 7 points 11 months ago* (last edited 11 months ago)

You can also get a pretty big inverter and attach it directly to the battery. A typical alternator can provide about 100 amps, or 1200 watts. In theory the battery could support higher draws for short amounts of time as well if the alternator can't keep up for a small surge (like a fridge running a cycle). Probably not nearly as efficient as an actual generator, but for occasional one-off usage it works in a pinch.

My EV doesn't support bidirectional stuff like that, but I've got a quick connector on the battery for that purpose. Same concept, but it's the DC-DC converter doing the work instead of the alternator. Worked great, but of course the power came back on 15 minutes later

[–] [email protected] 5 points 11 months ago

A dialysis machine probably uses more than 300W. Idk about other EVs, but my Ioniq 6 can output 1.8kW from each of its 2 outputs simultaneously.

[–] UxyIVrljPeRl 4 points 11 months ago

Some cars have them integrated.

[–] [email protected] 4 points 11 months ago (1 children)

Many new cars come with a power inverter built in, if not they are relatively inexpensive

[–] MaxVoltage -1 points 11 months ago (1 children)

How many american electric cars are cheaper?

[–] [email protected] 2 points 11 months ago* (last edited 11 months ago)

I'm not sure, I can only afford old vehicles, I don't pay attention to new cars prices whatsoever

[–] MaxVoltage 3 points 11 months ago* (last edited 11 months ago)

Dies in turbo diesel and inverter powering 3000watt subwoofers

[–] solrize 14 points 11 months ago (1 children)

Dialysis machine requires special prepping of course, but without such requirements I feel ok with a few flashlights and USB power banks. Plus warm blankets. I can get by without my vacuum cleaner or microwave til the power comes back.

[–] [email protected] 10 points 11 months ago

It sure is nice to not have all the food in your fridge go bad though, and to be be able to run some fans if it's the middle of summer, or space heaters in winter.

[–] [email protected] 13 points 11 months ago (1 children)

While I'd prefer better rail and public transportation infrastructure in America, this is a really cool use case for EVs that I'm excited about. See this video for how this works out in the real world

[–] [email protected] 4 points 11 months ago

Here is an alternative Piped link(s):

See this video for how this works out in the real world

Piped is a privacy-respecting open-source alternative frontend to YouTube.

I'm open-source; check me out at GitHub.

[–] ZombieTheZombieCat 8 points 11 months ago

Would still be a little difficult for people living in apartments. I always think about this when it comes to EVs, and owning "dumb" cars and maintaining them yourself, which I would like to do. My apartment complex has 3 or 4 EV chargers, which are assigned. So you would have to rent the apartment that comes with the EV spot, which I'm sure makes the rent go up by far more than it's worth. And no way is there room to work on your own car within the assigned spaces. No guest parking either. I guess it's just more stuff to add to the "cycle of poverty" list

[–] Aggravationstation 5 points 11 months ago

As much as I like electric cars this could be done with pretty much any petrol or diesel car with an inverter.

[–] [email protected] 4 points 11 months ago

BYD does what Tesladon't