Post #3928252

2026-07-19 06:03 UTC

Anyone with an EV and a home battery have a method for charging the EV from the grid, but not from the battery? e.g: charge at night cheap, but don't drain the battery. I assume in that scenario you'd just turn the battery off with some form of automation - but what about during the day where I might need to charge the EV from the grid, but I want the discharge the battery into the house for stuff in there (dishwasher, washing machine, heater/AC etc). Is that even possible?

Replies (3)

@lilstevie@infosec.exchange 2026-07-19 06:35

@decryption@aus.social have you looked into EVCC, if your battery and stuff can be controlled from it I think you might be able to automate that (I don't have a battery though, so I can't be certain)

Open ##3928251
@decryption@aus.social 2026-07-19 10:26

Did a bit of lurking around Facebook groups (ugh) looking for other people’s experiences and apparently all I need to do is get the electrician to wire up the EV charger before the inverter’s AC output, that way it’s physically impossible for the EV charger to be fed from the battery (unless the battery is exporting to the grid, which if it is, I wouldn’t be charging the EV anyways). At least that’s how I think it works in theory, I could be wrong.

Open ##3932271
@mattrobertson@aus.social 2026-07-19 06:15

@decryption@aus.social not sure what's possible but maybe the mode you want is charging the home battery from the grid at the same rate your car charges at

Open ##3933019