I have just setup my growatt 3000 with a 7kWh Prismatic 24V battery. The battery has a Daly BMS (75A charging and 150A discharge)
Yesterday I runned the batteries down (off grid) to 2.9V where the cutof is for the moment (everything looks well balanced). Then I plugged in the grid at time 0h.The following happened:
T=0h: charge current ~20A for maybe 20 minutes then zero A (bettery cells ~~3.0xV)
T= 0.3-2h: No charging....
T=2h-2.3h: 20 min 20A charging
.
.
.
T=8h the battery cells are still at 3.0xV
So why are not the charger running continously until the battery reaches max values in the setings?
Some settings:
High voltage cutoff in BMS 3.5V (28V)
Growatt settings
05: Battery type Use2
19: C.V charging voltage 28V
20: Floating 27V
21 Low cutoff 23.2V
11: Max utility charging 30A
12 Setting voltage back to utility . 23V (whatever that means?)
13: Setting voltage point back to battery mode....: 27V (whatever that means?)
14; SNU Solar energy and utility will both charge the battery
I measured the battery voltage at the growatt terminals when charing 20-25A and it was ~24V som there is no issue with wirering. I have 50mm2 wires running from battery checked all connections etc ..
Yesterday I runned the batteries down (off grid) to 2.9V where the cutof is for the moment (everything looks well balanced). Then I plugged in the grid at time 0h.The following happened:
T=0h: charge current ~20A for maybe 20 minutes then zero A (bettery cells ~~3.0xV)
T= 0.3-2h: No charging....
T=2h-2.3h: 20 min 20A charging
.
.
.
T=8h the battery cells are still at 3.0xV
So why are not the charger running continously until the battery reaches max values in the setings?
Some settings:
High voltage cutoff in BMS 3.5V (28V)
Growatt settings
05: Battery type Use2
19: C.V charging voltage 28V
20: Floating 27V
21 Low cutoff 23.2V
11: Max utility charging 30A
12 Setting voltage back to utility . 23V (whatever that means?)
13: Setting voltage point back to battery mode....: 27V (whatever that means?)
14; SNU Solar energy and utility will both charge the battery
I measured the battery voltage at the growatt terminals when charing 20-25A and it was ~24V som there is no issue with wirering. I have 50mm2 wires running from battery checked all connections etc ..