EVCS cannot decide where to get power from (grid or battery)

Q&A and troubleshooting EVCS
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1

How can I configure the inverter that the EVCS is using the grid instead of the battery?

2

Hello Island.
Yes, currently, EVCS can’t control that.
There are a couple of things that can help you:

  1. Manual mode. In manual mode, EVCS will provide power to the EV in any case. For ‘OFF-GRID’ mode, you additionally can set 'Stop charging at backup battery SoC, if Off Grid '(Settings->General->GX device). It will stop charging if the backup battery is lower than the configured level.
  2. Auto mode. In auto-mode, EVCS will provide power to the EV only if there is excess solar power in your system. Excess means all that is left after AC consumption. Additionally, you can adjust ‘Allow battery/grid power for auto mode’, ‘Allow low excess solar power for auto mode’, and ‘Battery/grid power timeout’ (Settings->General->GX device) to improve charging behaviour. For example, using some power from battery\grid if clouds and PV production are dropped. Or using solar power together with battery\grid if there is not enough excess solar power for the minimum charging current(6A). Also, you can set the highest priority for charging the backup battery by 'Start charging at backup battery SoC '. EV will start charging only if the SoC is more than the configured level.
  3. Scheduled mode. Same as the manual, but you can configure time intervals when the EV should be charging.