[vegardx]

I don't really think consumers want or need this.

The battery chemistry used in most EV batteries are not really optimized for a lot of cycles, and they're somewhat expensive to replace, so you're much better off just buying batteries that are made for the purpose. You also have fairly limited inverter capacity in most EVs, as the inverter installed is scaled to run the cars AC and infotainment system, which doesn't really need that much.

You also have to deal with either having beefy automatic/manual transfer switch or separate isolated circuits to prevent back feeding the grid electricity in an outage or during maintenance.

There's a lot of people repurposing used Nissan Leaf-batteries for what you're describing.

[OvbiousError]

The numbers in the post are 2.2 and 3.6 kW. Even 2.2kW would cover virtually all of my use.

I don't want to buy a battery for the purpose because it doesn't make sense economically. If I could get a car with this functionality though for a similar price as cars without it, that would be a big bonus.

[vegardx]

I'm not going to pretend that there aren't edge cases and personal situations that would make it viable, but my initial comment was on consumers as a whole.

And we're talking about averages. So sure, if you have gas boiler you probably could get by with a 2,2kW or 3,6kW inverter, but just powering a simple kettle would likely trip a fuse. You can get around it with just being a little conscious about what you power up, and when you power things up, but I'd argue that most people don't want to deal with that.

And remember, if you're grid connected you either have to have a transfer switch or separate circuits if you want to use this as a backup when the grid goes down. It complicates things a whole lot.

[labcomputer]

> so you're much better off just buying batteries that are made for the purpose

Or even just used EV batteries. I personally don't think that battery recycling is as big of an issue as some people say. But, if I'm wrong, a cheap worn-out EV battery with "only" 50% capacity is still very useful as a home backup.