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Using EV V2L to charge LFP batteries?

Monstruel

New Member
Joined
Feb 24, 2024
Messages
11
Location
New Brunswick Canada
Hello :)

My EV has the capability of providing Vehicle to Load (V2L), assuming I purchase the adapter. This outputs up to 20A at 120v AC.
I can power AC loads directly from the car in an emergency, but was wondering if there's a way to instead use that output to charge my home's LFP battery bank.
If this was 240v output, I could connect it to the generator input of my inverter. But the inverter can't accept 120v.

Any advice for what would be the inexpensive (but safe, of course) way I can use that AC output to charge the LFP bank?
It doesn't need to be quick, necessarily. Just needs to be possible in an emergency, like an extended power outage with the house batteries already depleted, and terrible solar production.
 
Reading that thread, if I understand it correctly, the rectifier gets the 120v input, and its DC output goes directly to the battery system bus bars. :unsure:
Interesting. Thank you!
You got it, that allows you to keep the inverters inverting.
You could wire in a relay / contactor to automatically turn on at xx.x battery voltage or reprogram the rectifier with info in the thread; I haven't gotten that far yet.

It can also accept 240V input and output 3000W.
 
V2L yes, I have Constant Voltage/Constant Current power supplies for this type use.

V2H is $10k to install from memory...not worth it.
 
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A simple AC to DC charger, perhaps?

Something like this?

I don't have any experience with this specific charger, but I think any 120v AC to 48v DC charger (with Lifepo4 charging profile) would be suitable.

I do have good experience with WATE brand chargers from Aliexpress. They are simple but have proven to be fairly reliable. I have a few of thier 12v and 24v Lifepo4 chargers.
 
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A simple AC to DC charger, perhaps?

Something like this?

I don't have any experience with this specific charger, but I think any 120v AC to 48v DC charger (with Lifepo4 charging profile) would be suitable.

I do have good experience with WATE brand chargers from Aliexpress. They are simple but have proven to be fairly reliable. I have a few of thier 12v and 24v Lifepo4 chargers.
Looking at those chargers, topping out at 500W is a bit too slow. Also they're more expensive here in Canada.

I ordered the 57V rectifier from Aliexpress for significantly less, even with paid shipping, and it should do 1500W on 120V.

If cost wasn't a factor, I would have gotten the EG4 chargeverter.
 

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