I have had a couple of contacts who have been experimenting with using the EVs onboard 230VAC socket outlet straight into an inverter/charger and onto their house battery for use in the home.
2 questions: 1: Would/could this be compliant with Aussie/New Zealand wiring rules? and 2: Has anyone tried this before?
I had the thought that I could add an energy meter onto the ourput of the house inverter to control the AC input current so that it tracks the load rather than simply dumping into the house battery (if the load is smaller than the capabilities of the vehicle’s inverter).
Comments and ideas welcome.
I work for a distributor and will NOT be promoting this as a supported feature but it would be very handy to get it working - at least until ubiquitous V2H solutions become available.
Hi Ben - thanks for opening this question. I would like to have it as option at least in an off-grid situation. Connecting the EV 230VAC as generator to the Mutliplus input in order to keep batteries charged.
(A first attempt to do so leads to a very quick shutoff of the generator / EV V2L outlet, as soon as the charger kicks in. )
A lot of this would depend on Why you want to do this, and also the power capability of the on board 230 ac output. From the comment above, it sounds like this is limited to a fairly low power.
To stop the vehicle inverter from shutting down, you need to limit the dc charging current on the inverter connected to it.
Why you would want to do this? If it is to use the vehicle batter for time shifting energy to utilise ev charging at low cost times, then it’s probably not going to be compliant.
Thanks @jestron . Can you tell me if the Multiplus was connected to any loads or was it stand-alone? I suspect that stand-alone would be easier on the EVs inverter at the time of connection. Also, the ground relay, was that disabled? That may help as well in case the EV senses a leakage type fault.
Yes, it’s definitely limited to low power. The idea is to utilise it to cover the small baseloads in the home on a Victron ESS system that has a relatively small battery. If you could drag say 10kWh of energy from the EV over say 10 hours at night this would be enough to see a lot of residential homes right through the night. The EV GPO can beset to turn off when the EV battery is at a given % SOC (so they can still drive the next day). I would also suspect that if the MP inverter is ONLY connected to the 52V house battery then it ‘may’ be compliant, but not certain about that, it would seem like the same thing as plugging a generator into a MP set to charger only and connected to the batteries…?
One wonders what you then charge your EV from?
‘Low power’ ~ 10kWh!! My house & office only use 8 - 15 kWh a day, and I have a 300W appliance running 24/7
Still 10kWh overnight is say 1kW for 10 - 12 Hours. That would keep even a small battery happy.
I would not think that this would be non-compliant if installed as a ‘temporary’ charger…