Charging battery from EV

harderthanf · 18-02-2022 12:17PM #1

Wasn't sure if this was a post for the EV forum but thought it might get better traction here.

Has anyone (is anyone) using their EV to charge smaller batteries. I have 2 x 1.2kWh batteries that I keep topped up. The wind has taken out the grid connection in my area and that last time this happened it was a 4-7 days outage - batteries will get me 2-3 days before needing a charge. Was wondering how an EV might stack up if I connected a 500W inverter directly to the 12V while the car is on. I am thinking I can use this inverter to charge my batteries with a low enough current (<= 10A).

I know there will be loss going from DC->AC->DC but I haven't planned this too well to avoid that at the moment!

Anyone any input or thoughts on this?

reklamos · 18-02-2022 12:45PM

https://www.boards.ie/discussion/2058233633/charging-battery-from-ev

You are losing a good chunk of energy with all the conversions. I do not know what EV you have but on KIA/Hyundai you already have 220v output so just use that for critical loads during power outages.

harderthanf · 18-02-2022 01:54PM

I've an eniro and a Leaf so would need to clip straight onto the 12V for either I think.

Charging battery from EV

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