Comments by "Archangel17" (@MDP1702) on "Technology Connections"
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@scottfranco1962 Your entire comment is stupid
your car is not plugged in at home when you need the battery power
Yes, it is. Peak demand happens in the evening when people come home from work up untill the time they go to sleep. During this time the car would very much be plugged in. Most of the day an EV won't be driving, unless you're talking about robotaxi's, though these too will have peak and low demand times, during low demand many taxis could be linked to the grid too.
and anyways you would be taking charge from the car that you need to drive it.
In regular days you probably only use like 15-20% of charge to drive. The other 45-40% between 20% and 80% could be used as storage (though maybe 30-35% would be a safer option). Furthermore you'd discharge the battery during the evening and recharge during the night/day, so there would be no problem regarding range.
The main reason Elon prefers not to have V2G is because they'll sell less battery walls and installations if this is used. The only reason not to possibly use V2G would be battery degradation. Though if this isn't really a problem, there is no reason not to have at least V2G capability. Whether it is used would be up to the end user/owner of the car.
That being said, your EV might not be at home when your solar panels produce power, so a small house battery would still be usefull. But this doesn't need to be large, just enough to get your solar generated power, not a whole day of electricity usage, let alone 2 days for example. And if you work at home you wouldn't even need a house battery, or maybe just an even smaller one to be safe.
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@reinbeers5322 Most people would use only around 15-20% of their battery in a day on average. That means even if you stay within 20 and 80% charge to lower degradation, you still have 40-45% sitting idle doing nothing. You could as well use it, since you have it. If it is economical, which I'll come back to later. Most people will want a car that can do at least 300 miles on one charge and on average people drive around 30-40 miles a day. So there is a lot of battery you will always take with you, but wouldn't use, with V2G you would be able to use this capacity daily, instead of just these very few times a year where you need to take a long drive and for which you choose a longer range. Ofcourse if you'd rather have a 100 mile car or get a car with a range you reach often (for example if you regularly need to drive long distances), then yes getting more battery for V2G is indeed stupid. But if you have a car where you only use a small part of the capacity anyway averagely, why not just have V2G?
Now as for the economical side, here degredation and savings/income come into play. You could use V2G to just power your own home, in which case you need to look at the savings from charging with low price power and using during high price moments is worth the extra degradation. For this you'd need to know the extra degradation and your savings. If the savings outweigh the cost of battery life time loss => use V2G, else don't.
The second possibility is that you don't just use the battery for your house, but also the grid. In which case there would need to be system to "buy" (charge) electricity at a low price (low demand, high availability times) and sell (discharge) at high price times (peak moments) or you get a certain amount of money from an electrical company per kWh they store in your battery. Either system is a possibility in the future. Again in this case you'd need to calculate whether the decrease in battery lifetime costs less than the profits you make from it.
Will V2G be usefull? time will tell, but I wouldn't be surprised if it will. Would it be usefull for everyone in every situation? Ofcourse definitely not.
TLDR: the only concern is battery degradation vs savings/profit and how you use your EV on a regular basis.
In the end there must be a system put in place that doesn't exist yet, or at least isn't good enough yet, but it can be done. And ofcourse you as the end user have to be able to change settings (when to charge/discharge, maximum/minimum charge at what time, ...). This is for the future.
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