Normally I run my EVCS in Auto mode. But, about once a week I want to force some EV charging because I need it for the car and I know the house batteries can handle it (e.g. because enough sun will be out later in the day). In the Auto mode, I have a relatively high starting SOC value of 85%. When I switch to Manual, I expect the EVCS to override the Auto parameters. However, when the SOC is below the starting value, the Manual mode also respects this value and does not start charging. And to then get it to charge, the override is hard to configure (it requires the app and it messes up my Auto set up). Is there a better way of dealing with this?
Hello @harko. Can you please provide a screenshot of the GX device settings from the EVCS web interface?
ok. The manual mode ignores the ‘Start charging at backup battery SoC’ option but uses ‘Stop charging at backup battery SoC, if Off Grid’
So, according to your settings, Manual mode should start charging the EV if the backup battery SOC is more than 75%. Does it work like that for your system?
Hi Nicolas, thank you for your quick response. That would clarify it.
It requires a bit of thought, but I could then lower the “stop charging” value to e.g. 40%. In Auto mode I would never reach this value if it starts charging at 85% AND having a 10 min. timeout when discharging house batteries. Is my interpretation correct? (Note: if it could reach 40% in Auto mode, the value would be too low for me. Off grid I would get in trouble with the houses that run of it)
I will try this over the weekend and let you know. Right now car and house batteries are all (too) full.
PS: Note that the “stop charging…” text is a little misleading for me (especially because it sits next to the “start charging”). How you describe it, it is more a “no charging … below SOC value”
yes, makes sense. In the worst case, auto mode will stop charging after 10 minutes(according to your settings).
I tested it, and this works fine now. Thank you for the clarification!
PS: I still have an issue with the EVCS starting with low excess PV, see my other question. The two influence each other, e.g. at the end of the day when PV is running low, the EVCS gets into a few cycles of stopping (because it was discharging house batteries) and starting again because “waiting for sun” is met at 1.4 kW (which my panels almost always give, unless it is really dark).
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