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Joined 3 years ago
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Cake day: August 16th, 2023

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  • I wouldn’t worry about the battery. Any potential harm comes in before it gets to the battery, and there’s likely a DC-DC converter before that anyway.

    The first thing to validate is the listed specs. If your laptop expects 12v (usually listed on a sticker on the device), don’t connect a 19v brick. Same for center-positive/center-negative. USB-C bypasses all of that, since it negotiates a matching spec before charging.

    The second thing is how well it adheres to the specs it lists. This isn’t something that you can really test yourself. It would require a lot of specialized equipment and skills, since the answer can change in different circumstances. It might work fine for a while, but eventually deliver rich, chunky volts. This will (likely) fry the motherboard, and maybe more than that. USB-C does NOT bypass this. Some of the worst chargers on the market are USB-C.

    The only realistic way to avoid the second is to get a quality charger from a trustworthy source. Many will only recommend OEM, but you also have to be careful about counterfeits on eBay or scAmazon. You can use aftermarket, but only if it’s a trustworthy brand like Anker.






  • Huge is subjective, but there are many solar farms today running on just a few acres. Some quick googling says that community-based and commercial farms typically run on 10-40 acres, generating between 50-200 megawatts. If you consider 40 acres to be a huge farm, then sure. But it doesn’t make much sense to run these in a decent populated area anyway. This is no different than coal, gas, or other power plants today, albeit for different reasons.

    As for huge batteries, yes, we will need them once solar power capacity reaches a point where generation in the day exceeds the demand. As it stands, many places still have off-peak pricing at night. Solar would need to counterbalance that completely before we need huge batteries for solar.







  • The start button (or app, or whatever) absolutely does something, and to say otherwise leads me to think you need to dive in deeper to how they work.

    The button closes the contactors, activating the high voltage battery pack. To do otherwise is a massive safety risk. It also verifies the key (to prevent theft, and required by law) and on some models launches the parts of software needed for driving.

    I’m not familiar with Tesla’s design, but it should be easy enough to set the code to run this process whenever the door closes. Whether that’s what people want is a different question entirely.



  • Road trips are certainly a weak point for EVs. If you go on more than 3 or 4 per year, EVs are not (and probably won’t be for a while) a good option.

    But I do at least see it getting better in the next future. All of the pieces are there, just not in one place. When taking a long trip, you’re already supposed to stop every 2 hours to stand up and walk around for a bit. You or your passengers probably also need to use the restroom. Every 2-3 of these, you need to stop for food.

    Currently, it’s a PITA to link these with fast charging. You should be able to pull into a truck stop (etc), easily and conveniently, and plug in while you do the rest. Except the fast chargers aren’t usually at truck stops, and apps like ABRP don’t have an option to set stops by time.

    If this all lined up, and you have a car with reasonably fast charging (like the Ioniq 5), I don’t think you’d have to wait on charging very much at all.


  • To own an EV, you basically have to be able to AC charge at home or at work. The good news is that all of the new 5-over-1 apartment buildings (at left around here) are being built with a handful of chargers right from the beginning. As they become more popular, it’s pretty easy to add more.

    But you can also get creative. My local chain grocery store has level 2 chargers in the parking lot. These don’t make much sense to use while shopping, but they’re convenient enough for all of the older apartments nearby. Most universities have AC chargers, but it’s probably not convenient and you’d have to move your car the next day.



  • If you’re looking at fast charging (1 hour or less) on a regular basis, you’re doing it wrong. The vast majority of charging should happen while the car is already parked, using level 2 AC charging. This means when you park at home, with, etc, you take just a few seconds to connect a charger, then walk away. When you come back ~8 hours later, you take a few seconds to unplug before leaving. This approach, believe it or not, means I spend less time dealing with fuel than if I had a gas car.

    Plus, AC charging is much cheaper, and more reliable. These chargers are very simple devices, that just do a bit of monitoring and negotiation. They deliver raw 240v to the car, which has its own AC-DC converter.

    DC fast charging is much more expensive - $14 for a full DC charge is very unlikely. That’s because DCFC stations are very big, complex installations. As such, they also have parts fail on a regular basis. DCFC is often more expensive than gas, but again should only be used on rare occasions.

    As for batteries failing, it’s about as often as a gas engine fails. IOW, it’s extremely rare until the car is EOL anyway. Battery degradation is typically 85-90% health remaining at 100k miles.