Force ESS relay test with battery <20%?

[kappa7]

Hi,
I have a MultiPlus II GX 48/5000 set up in ESS mode with a 16 kWh LFP battery and a VM-3P75CT in a three-phase system.

To avoid wasting power when the battery is empty, I found that I can power off the MultiPlus using Modbus register 33 (1 = Charger Only; 2 = Inverter Only; 3 = On; 4 = Off) — by setting it to 4, and then back to 3 when excess solar power is detected.
I’ve created two Home Assistant automations to handle these actions.

The only problem I’ve found is this:
When I switch the MultiPlus back on, feed-in doesn’t work until the ESS relay test is performed. The issue is that the relay test only runs if the battery voltage rises above 56 V (which corresponds to 100 % SOC for an LFP battery), or when the reported battery SOC increases above 20 %.

Is there any way to overcome this behavior?
It seems that these thresholds are hardcoded, which isn’t very flexible for a charger/inverter meant to work with different battery setups and chemistries.
Is there maybe a way to manually trigger the ESS relay test?

[fredvduin (Fredd)]

Can you change the mode in the GUI

[kappa7]

Thanks, but this doesn’t solve the ESS relay test delayed until the SOC rise above 20%.

[fredvduin (Fredd)]

I try to understand what your problem is.(I do not recognize this problem)

What is the value in ESS “Minimum SOC (unless grid fails)“

[kappa7]

Update:
After upgrading the MultiPlus II firmware from 557 → 558 and the ESS assistant from 018C → 018E, the issue disappeared.
Now, when the MultiPlus II is re-enabled (Modbus register 33 from 4 → 3), the ESS relay test is immediately marked as “completed”, even when the battery is below 20 % SOC.