Currently I’m set as “self use”, is there a setup/setting/option that allows me to;
- consume & top up the ESS battery
- once my ESS battery is full, route excess solar to my EV?
- once my EV is full, route any further excess to the grid?
Currently, if I plug my car in, it’s draining the battery, which I’d rather keep for grid usage.
I can charge my car off peak if need be…
If the EV is draining you home battery then it is being seen as a load by the inverter.
The correct way to deal with this is to change the wiring so that the inverter does not see the EV charger, this is usually done by splitting the feed just after the smart meter, one feeds the consumer unit and inverter, the other feeds the EV charger - when it is wired like that the inverter will not see the EV charging and so won't discharge to meet the load, equally if the EV charger is capable of solar charge it will still be able to do that.
If you don't change the wiring the only way to stop the home battery discharging is having it set to charge at the same time as your EV - if you are not using schedules, the easiest option is to set a charge period for the same time as the EV is charging. If you are using schedules you can either set a force charge for the same time period as the EV is charging, or set a Self Use period to be the same as the EV charging with minsoc set to 100% - that way your battery will slow charge for this time period.
The correct way to deal with this is to change the wiring so that the inverter does not see the EV charger, this is usually done by splitting the feed just after the smart meter, one feeds the consumer unit and inverter, the other feeds the EV charger - when it is wired like that the inverter will not see the EV charging and so won't discharge to meet the load, equally if the EV charger is capable of solar charge it will still be able to do that.
If you don't change the wiring the only way to stop the home battery discharging is having it set to charge at the same time as your EV - if you are not using schedules, the easiest option is to set a charge period for the same time as the EV is charging. If you are using schedules you can either set a force charge for the same time period as the EV is charging, or set a Self Use period to be the same as the EV charging with minsoc set to 100% - that way your battery will slow charge for this time period.
Thanks, re-wiring isn't very DIY'able, but the latter option I will explore - thanks again!Dave Foster wrote: ↑Fri Sep 12, 2025 3:28 pm If the EV is draining you home battery then it is being seen as a load by the inverter.
I'm happy to pay for my electricity during the night, given it's reduced rates. So would much rather save the battery for daytime usage.