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Sounds like you know the area. I've been dreaming about the day we can have solar on the roof, charging and storing that energy in the car, and releasing that

by LightG 5y ago

Sounds like you know the area. I've been dreaming about the day we can have solar on the roof, charging and storing that energy in the car, and releasing that energy to the home via V2H when needed. I looked into this about 6 months ago and options seemed very scant due to technical limitations or manufacturer hesitation. Are you aware of anything new or actually working in this arena? Question open to all, obviously. Thanks.

pedrocr 5y ago
I only follow this out of curiosity and because I do have an EV and solar and am wondering when/if a battery will make sense. I have yet to see any solution to power the house from the car unfortunately. These announcements by Ford and VW are the most recent ones I've seen. One option that is out there and covers a part of the use case is a generic EV home charger that can be configured to modulate it's load based on the availability of solar: https://www.youtube.com/watch?v=0EtegQfZQRw https://www.youtube.com/watch?v=0EtegQfZQRw The same company also has some smart electric water heaters that also allow optimizing how much of the solar gets used. How each solution helps depends massively on what your situation is (e.g., on or off grid) and the specifics in your geography (e.g., year long vs 15 minute net metering). Here we have 15-minute only net metering so I have a script that runs every 15 seconds, figures out if I'm giving away power to or drawing from the power company and turns on and off loads based on that (water heater and radiant flooring). If you have a battery somewhere in the system it becomes an easier tradeoff as you just need to react to the state of charge which changes much more slowly. All this is still pretty much in flux. With LFP batteries becoming very cheap and ideal for home solutions I expect Enphase or some other company to offer a price competitive full solution soon.
- LightG 5y ago
  Interesting, thanks. That's still a step forward from where I thought we were. We'll get there.

by LightG 5y ago

pedrocr 5y ago

I only follow this out of curiosity and because I do have an EV and solar and am wondering when/if a battery will make sense. I have yet to see any solution to power the house from the car unfortunately. These announcements by Ford and VW are the most recent ones I've seen. One option that is out there and covers a part of the use case is a generic EV home charger that can be configured to modulate it's load based on the availability of solar: https://www.youtube.com/watch?v=0EtegQfZQRw https://www.youtube.com/watch?v=0EtegQfZQRw The same company also has some smart electric water heaters that also allow optimizing how much of the solar gets used. How each solution helps depends massively on what your situation is (e.g., on or off grid) and the specifics in your geography (e.g., year long vs 15 minute net metering). Here we have 15-minute only net metering so I have a script that runs every 15 seconds, figures out if I'm giving away power to or drawing from the power company and turns on and off loads based on that (water heater and radiant flooring). If you have a battery somewhere in the system it becomes an easier tradeoff as you just need to react to the state of charge which changes much more slowly. All this is still pretty much in flux. With LFP batteries becoming very cheap and ideal for home solutions I expect Enphase or some other company to offer a price competitive full solution soon.

LightG 5y ago
Interesting, thanks. That's still a step forward from where I thought we were. We'll get there.