V2H crickets

[Just Passing By]

If you're going to use your truck for backup power in an emergency, beware that you likely use MORE electricity per day than you think. Below is a screenshot of the last day we didn't have AC running or charged one of the EVs. There's a lot of vampire drain in a house and if using V2H, you'll need to turn off some of the breakers. Note that in the screen shot below, we do have a jacuzzi and swim spa that accounts for some of this energy usage.

Vampire drain ... looks like you have a whole coven based on that consumption!

More seriously, for reference I live in SE San Jose in a ~3000 sq ft house and my average daily consumption at this time of year from the last PG&E bill (7/16 to 8/13) is less than 10 kWh/day. That includes electric water heater consumption for one person, no a/c, running computer and a 55" tv as screen all day plus microwave use around breakfast and dinner. There has to be significantly more consumption than just vampire drain there. The regular pulses of consumption look like either your electric water heater, if you have one, or the jacuzzi and spa you mentioned, I wouldn't classify those as vampire drain.

Edit: Forgot to mention fridge-freezer is ~1.5 kWh per day in my total.

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[CharonPDX]

If you're going to use your truck for backup power in an emergency, beware that you likely use MORE electricity per day than you think. Below is a screenshot of the last day we didn't have AC running or charged one of the EVs. There's a lot of vampire drain in a house and if using V2H, you'll need to turn off some of the breakers. Note that in the screen shot below, we do have a jacuzzi and swim spa that accounts for some of this energy usage.

Truth. Although in my case, my home battery only covers "essential loads" that automatically cuts out a lot of vampire drain. My standard "not ultra-hot or ultra-cold, not charging EV" day of power usage is 35-45 kWh.

Our last multi-day power outage, we used ~6 kWh per day. (Although in that case, house heating switched from electricity to natural gas.) Combination of only powering "essential" plus purposeful turning off things on the "essential" circuits to truly leave only essential items. (Our internet modem+router are on the essential loads circuit, but we discovered that our internet provider only had 4 hours of backup at their side. So after 4 hours, we powered off modem+router.)

 

[Just Passing By]

Probably snagging an Enphase Bi-Directional so I can use either of my EVs.

https://enphase.com/ev-chargers/bidirectional

Thanks for posting the Enphase info, I hadn't seen it previously. I read the July 2025 whitepaper they published and if I read it correctly then it looks like the Enphase charger will only support DC from the car. My understanding is the R2 will be an AC only supply from the car, so maybe an Enphase bidirectional charger won't be the solution for me after all ... or a solution for anyone who wants the option to pull DC from the R1 or AC from the R2 if they own both vehicles.

 

[kanundrum]

Came here to post this, this works and is available now. /Thread

A member in the discord community has a full setup with his Rivian and gets 11kw output max discharging

 

[JacobAZ]

Question regarding V2H and reality. Lets say you by an EV with an 8 year 120,000 mile warranty on the drive battery. You park it in a garage of a large house in Phoenix, AZ. You never drive it but it's hooked up for V2H and supplies an average of 50kwh per day to the house. After 5 years it has zero miles and 3 more years on the warranty. However, the battery has provide the house with 91,250 kwh of electricity over the 5 years. This equates to 182,500 miles of driving at 2 miles per kwh. Should the company still stand behind the warranty?

 

[Time2Roll]

Really need a home system first IMO. Then a vehicle can add some capacity or functionality.

For my home system the Rivian would be only for very difficult conditions. I would just run a cord to keep the fridge cold, water hot and internet or some other small items. Or to bail out for some other area.

 

[Dark-Fx]

Question regarding V2H and reality. Lets say you by an EV with an 8 year 120,000 mile warranty on the drive battery. You park it in a garage of a large house in Phoenix, AZ. You never drive it but it's hooked up for V2H and supplies an average of 50kwh per day to the house. After 5 years it has zero miles and 3 more years on the warranty. However, the battery has provide the house with 91,250 kwh of electricity over the 5 years. This equates to 182,500 miles of driving at 2 miles per kwh. Should the company still stand behind the warranty?

No, and Rivian won't in that case, which is stated in their warranty guide that you can't use the vehicle for long term stationary power backup.

 

[CharonPDX]

Question regarding V2H and reality. Lets say you by an EV with an 8 year 120,000 mile warranty on the drive battery. You park it in a garage of a large house in Phoenix, AZ. You never drive it but it's hooked up for V2H and supplies an average of 50kwh per day to the house. After 5 years it has zero miles and 3 more years on the warranty. However, the battery has provide the house with 91,250 kwh of electricity over the 5 years. This equates to 182,500 miles of driving at 2 miles per kwh. Should the company still stand behind the warranty?

See Tesla for an example. They warranty the S/X/3/Y only if *NOT* used for this purpose. Cybertruck *DOES* keep its warranty when used for power backup. Other than:

Using the vehicle as a permanent, stationary, or long-term power source or backup

So your specific example would be forbidden by basically any manufacturer. But if you do drive it, but also use it for home-backup, you'll be good.

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