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Cake day: October 25th, 2023

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  • Many now have a heat pump, similar to the AC but it can reverse the refrigerant flow and either cool the air coming in the car, expelling hot air by the radiator or heat the air coming into the car and blow cold air outside.

    Older EV mostly had electric heaters, cheap and simply just like a plug in heater at home. But the can take 3-5 times more power.

    Our Ioniq 5 mainly uses the heat pump, except for when running defrost then it uses both. Once the car has warmed up it can take just 0.8 - 1 kw to maintain the temperature. So with a 100% charge and 74kwh of battery capacity you can assume it would run over 70 hours.











  • It’s not a new idea that’s the same way the chevy volt worked with a 84HP 4 cylinder. The Outlander also works like this with the ICE mainly driving a generator.

    A 30A charger takes about 7200 watts, you can get a small generator at harbor fright that will do that with a 420CC 12HP motor. The standard 3.6L will put out 292HP and the battery acts as a buffer so the EV motors can put out more power then the 3.6 can deliver.


  • I know any L2 charging is far more efficient than 120V charging, after that the difference is said to be very small. Something like 72% efficient at 120V, but 82-85% at 240V.

    I read if you want the absolute lowest charging losses run your charger at 80% of it’s max capacity. Like the cables are designed to carry 11kw/48A maximum with acceptable voltage drop, running it at 40A will cut that voltage drop. But in the end that may only be a cent or 2 of power lost/saved and not something to worry about.


  • I think once Toyota really gets into EVs then they will become mainstream. Should they actually start selling them with solid state batteries that offer 500+ miles and charge faster than anything can today it will be game over for mainstream ICE. Especially if they keep their customers by moving them to EVs of the same model. Like make a Prius Pure, (full EV) and don’t make some weird new model like a E-Volve or E-something.

    Right now EV cars are great, 300 is fine for many people but add in normal 20-80% use and loss of range in winter having an extra 100+ miles would be a nice buffer for mid to high end cars. But in trucks and large SUVs the battery technology isn’t quite there yet. 1500-2000lbs of batteries that only give 165 miles of towing just isn’t a great way to do it.