I work from home, so my car is typically sitting in the garage during the peak 1pm-6pm hours in the summer where the cost of the TOU plan jumps to $0.42/kwh. Allowing the car to run the house at that time could potentially save me a lot of money as I typically use about 5-6kwh per hour for those 5 hours. Having that reduced to the cheaper overnight rate of just $0.05/kwh stored in the car would save me almost $1,000 a year.
Right now my power company offers two options.... a TOU plan that spikes to $0.42/kwh from 1-6pm June-September and $0.15/kwh for the rest of the year between 5-9pm, then dropping to $0.06/kwh for off peak and $0.05/kwh for super off peak. Or a flat rate plan of $0.09/kwh all the time. I've run the numbers and fo4 me the flat rate plan is cheaper, mainly because of that $0.42/kwh spike in the summer where I'm running the A/C.
I am having some solar panels installed right now. (Tesla guy was here measuring stuff a couple days ago) So I'm going to see how much that cuts that peak time, since my roof faces west and they should be at their peak right at that time. If it's enough I'll switch to the TOU plan and see i& it saves me any money. (they have a 1 year guarantee where if you switch and it costa you more they'll switch you back and refund you the difference, so no risk)
I considered getting powerwalls too, but at $10k each and the fact I'd need 3 at peak usage times, they'd not really save me any money. But I already have the car, and it's just sitting in the garage, so if it could be used instead using an adapter like this I might consider it.
Although from what Ai understand this particular unit doesn’t run the house like a powerwall, it only feeds the grid in an attempt to offset your usage via net metering. We have wholesale net metering in my state, so they only pay you $0.07/kwh regardless of the time of day, so that wouldn’t really save me anything. I'd need one that could actually run the house like a powerwall.