question

Hello,

I have a problem with ESS and BatteryLife.

First thi is my system :
- 3 PV strings with 3KWc each
- 3 BlueSolar 250/70 MPPT
- 48V 500Ah tubular battery
- the Cerbo GX
- 2 Multiplus II 5000/48 70 configured on parallel mode (only one 230v phase)

My problem is the Battery Life algorithm use grid to charge the battery.

It not use a lot, just about 100 W but I don't understand why.

There is some screenshots to illustrate that :

1) BatteryLife is on and Active SOC Limit is 80%.

Has you can see, the system use 52W (318 - 266 = 52) of grid to chage the battery

2) If I turn off BatteryLife

The system use the battery to feed the loads (grid set point is 50W so the 36W consummation
of grid is normal)

This comportement is OK because the minimum SOC parameter is set to 50% and the battery state is upper (74%)

3) Now if turn on Battery Life again

The system only use solar energy to charge the battery

I think it always should be the correct comportement

4) But if I wait a few minutes, without changing any parameter, the algorithm use again grid to charge the battery

Does anybody understand that and can explain me please...?

Thanks