V2L adapter for EV charging port that supports 240V split phase

[ronstory]

Hi--

First post. I have a house I'm doing remodel and ended up all electric since the cost of adding a natural gas connection was cost prohibitive.

I have replaced the house's electrical service, added two 200A panels and have a simply 50A interlock to the dwelling panel for emergencies. I'm not worried about losing power and have automatic roll-over, I only get irritated if we lose power for more than 12 hours and may start to impact the fridge and freezer contents. I have a 7600W inverter generator that I can connect to get the critical circuited powered if needed and that plenty of power to run the backup heat, two pellet stoves.

I'm now in the market for EV, but would like a power port that supports 240V 30A. The only choices seem to the Ford F-150 lightning (option) and the Tesla Cybertruck. Rumor has it the Rivian R2 will have support for 240V, but who knows.

The EV options would broaden if there was a device that could plug into the EV charge port and connect to the battery pack and invert the pack voltage to 240V split-phase. However, I've seen the cheapo devices on Amazon that allow a vehicles like the iconiq to provide a NEMA plug, but all I've found is 120V version.

Has anyone heard of the inverter that is capable to connecting to a bi-direction J1772 or NACS charge port? I'm not looking for a portable device. I would be happyif it was wall mounted and just provided the 240V needed to key the house functional for long power outages, courtesy of the EV battery pack.

Thanks,
Ron
Gig Harbor, WA

 

[mciholas]

One problem: the car has to close the contactor between the battery and the DC port of the CCS plug. If the car won't close that contactor, no power to the port. Maybe V2G/V2H cars can do that, but most EVs don't.

A solution: get an inverter and battery. Let the inverter and external battery generate the 240 VAC split phase for your house. Then, buy a charger that runs on the V2L from the car which charges the battery.

The benefit is that the inverter and battery can handle the big loads while the V2L provides a steady input of power. Basically, the backup, the car, only has to provide the AVERAGE power, not the PEAK power.

Further, if you have a generator, they run best at or near full load and a house often runs near almost no load which it is horribly inefficient. So you can run your generator under load for a short period, charge the battery up, shut down, and then run from battery for a while.

I have an Ioniq 5 which can only put out 120 VAC 1800 W. That seems too weak to run the house, but it is 36 KWH per day which is enough to cover my average usage. I can also unplug the car, leaving the house operating, drive to DCFC and charge up the car and drive it home. It is an electric "jerry can".

Mike C.

 

[ronstory]

Yes, I considered a inverter and dedicated house battery but was hoping for a solution that didn't require one. The Lightning with the pro-power 9.6K would be a perfect solution, except I already have a Tundra that is a very reliable and practical hauler and can tow the airstream and not really notice.

I upgraded to the inverter generator last year and it is much more fuel efficient than my old constant speed 3600 RPM version. Plus, it is much quieter.

 

[arbor]

Hummer EVs ‘24 and on can do 25 amps at 240V as well. I plug a Chargeverter into mine for backup power, and the 212kWh battery in them is no joke.

 

[e645824]

There are numerous V2L units available for Teslas. They "trick" the contactor on the DC charge point into closing, then energy flows OUT of the battery instead of IN. The funny thing is that the Tesla knows that kWh is negative but doesn't seem to mind.

For your 240V, I found this unit:

https://tlyard.com/products/10kw-v2...-nema-standard-tlyard?variant=55381704212861]

but I don't have any experience with it. It comes in 3 versions; be sure to select the version based on which Tesla connector is on the car.

There are numerous on-line pages about V2L boxes flike this or Teslas at numerous price points. Even some tear-downs. It is also recognized that a software update could make any of these V2L units non-workable.

Unknown if Tesla is working on their own V2L box to do this... They do have a "Tesla Discharger" but it is a resistor to drain the battery (for battery service) but it doesn't have an inverter.

Scott

 

[ronstory]

Hummer EVs ‘24 and on can do 25 amps at 240V as well. I plug a Chargeverter into mine for backup power, and the 212kWh battery in them is no joke.

I didn't think about the Hummer and that is one heck of a battery pack. Also sure I won't fit in the garage. ;^)

 

[ronstory]

There are numerous V2L units available for Teslas. They "trick" the contactor on the DC charge point into closing, then energy flows OUT of the battery instead of IN. The funny thing is that the Tesla knows that kWh is negative but doesn't seem to mind.

For your 240V, I found this unit:

https://tlyard.com/products/10kw-v2...-nema-standard-tlyard?variant=55381704212861]

but I don't have any experience with it. It comes in 3 versions; be sure to select the version based on which Tesla connector is on the car.

There are numerous on-line pages about V2L boxes flike this or Teslas at numerous price points. Even some tear-downs. It is also recognized that a software update could make any of these V2L units non-workable.

Unknown if Tesla is working on their own V2L box to do this... They do have a "Tesla Discharger" but it is a resistor to drain the battery (for battery service) but it doesn't have an inverter.

Scott

Thank-you!! The looks like exactly what I need if I get a Tesla! Thank-you... now to research to see if they really do work, and live with the risk that OTA could make it useless.

 

[hybe022]

Hummer EVs ‘24 and on can do 25 amps at 240V as well. I plug a Chargeverter into mine for backup power, and the 212kWh battery in them is no joke.

why don't they put this battery pack in like a nissan leaf?
no one will complain about range anxiety when it can do over 1000kms

 

[mciholas]

why don't they put this battery pack in like a nissan leaf?

Hummer EV curb weight 9063 lbs.

Nissan Leaf S curb weight 3509 lbs.

If you make the Leaf big and strong enough to carry the Hummer pack, it will be as big as the Hummer.

Mike C.

 

[e645824]

Thank-you!! The looks like exactly what I need if I get a Tesla! Thank-you... now to research to see if they really do work, and live with the risk that OTA could make it useless.

There are a couple of long threads for Teslas over in the TMC forums. Several people have tried the 120V versions from various vendors and they seem to work as expected. Here are a couple of threads; and some posts contain tear down photos:

​

https://teslamotorsclub.com/tmc/thr...ings-with-model-3.140567/page-40#post-8591725​

​

https://teslamotorsclub.com/tmc/thr...ly-passes-testing.336194/page-16#post-8602420​

These units are quite cleaver. They tell the car, "Hey, it is time to DC fast charge", and the car closes the contactors thus putting 400V DC on the charge-port connector (i.e. a direct connection to the 400V high-voltage battery). Then the V2L units use that 400V DC, run it through the inverter in the V2L box, and provide 120V. And that one unit I found does 120V and 240V. See my Post# 5 above for the link.

But Tesla could brick these V2L units at any moment by cutting the port off when it sees energy outflow instead of inflow. The Tesla vehicle already knows this because the dashboard display will say things like, "-5 kWh charged" instead of "5 kWh charged" so it knows that energy is flowing out of the battery. However, I'm sure that Tesla is aware of these units. The alternative for Tesla folks is to tapping off of the 12V low-voltage system but those are limited to a couple of kilowatts and the car might think that something is wrong with the 12V low-voltage lead-acid battery (or 15.5V low-voltage lithium battery 2022+) and shut down the vehicle.

 

[Capt Bill]

Has anyone heard of the inverter that is capable to connecting to a bi-direction J1772 or NACS charge port? I'm not looking for a portable device. I would be happy if it was wall mounted and just provided the 240V needed to key the house functional for long power outages, courtesy of the EV battery pack.

Thanks,
Ron
Gig Harbor, WA

I would like to find and study the Spec sheets and install manual of one of those type of units. Are there any Portable Bi-Directional Inverters for EVs to 240vac split phase, on the market at present? I would be pleased to hear there are such options we could purchase at a reachable price. Who is innovating in these direction?