Hi!
I have 2 solar panels 2x230W, serial connected (2x24 v). Connected to a Victron MPPT SmartSolar 100/20.
The MPPT feeds an 8 cell LifePo4 battery (24 volts). The LifePo4 battery is controlled by a Daly BMS 8S
On the Battery negative side, I have a Victron SmartShunt installed. There is also a Victron Sinus Inverter connected.
According to the VRM portal I started getting High voltage alarms. It says over 30V going to the batteries. I measured the battery + - on the MPPT and I do get a bit over 30 voltages. Not sure why. The MPPT is set as a 24V charger. The config of the MPPT is according to the standard for LifePo4, giving charger voltage at 28.4. You can also see that one of the graphs jumps when this happens, while other graphs show normal. Still my DC tester also shows over 30V.
Temperature in the garage where all hardware is installed is around 15 degrees C (not too cold, not too hot)
How can I even get an output larger than set in the MPPT controller? It should be impossible, right?
Seems to be happening when battery gets close to 100%.
Appreciate all help I can get.
Faulty MPPT charger?
As mentioned earlier, I have no external charger connected. And not anything else that can "add" energy to this system
MPPT settings:
Max charge current: 20A
Battery voltage: 24V
Absoption voltage 28.4V
Float Voltage: 27V
Charger enabled: True (which is the charging function of the MPPT as I understand it)
Daly BMS 8S 24V settings:
Cell volt high protect: 3.65
Sum volt high protect: 29.0V
Chg overcurrent protect: 25A
DisChg overcurrent protect: 30A
Everything running latest fw available
Latest update: I started a small radiator (200W) and alarm went away. Still, why do I get over 30V from MPPT battery connection points when I measure?
I have 2 solar panels 2x230W, serial connected (2x24 v). Connected to a Victron MPPT SmartSolar 100/20.
The MPPT feeds an 8 cell LifePo4 battery (24 volts). The LifePo4 battery is controlled by a Daly BMS 8S
On the Battery negative side, I have a Victron SmartShunt installed. There is also a Victron Sinus Inverter connected.
According to the VRM portal I started getting High voltage alarms. It says over 30V going to the batteries. I measured the battery + - on the MPPT and I do get a bit over 30 voltages. Not sure why. The MPPT is set as a 24V charger. The config of the MPPT is according to the standard for LifePo4, giving charger voltage at 28.4. You can also see that one of the graphs jumps when this happens, while other graphs show normal. Still my DC tester also shows over 30V.
Temperature in the garage where all hardware is installed is around 15 degrees C (not too cold, not too hot)
How can I even get an output larger than set in the MPPT controller? It should be impossible, right?
Seems to be happening when battery gets close to 100%.
Appreciate all help I can get.
Faulty MPPT charger?
As mentioned earlier, I have no external charger connected. And not anything else that can "add" energy to this system
MPPT settings:
Max charge current: 20A
Battery voltage: 24V
Absoption voltage 28.4V
Float Voltage: 27V
Charger enabled: True (which is the charging function of the MPPT as I understand it)
Daly BMS 8S 24V settings:
Cell volt high protect: 3.65
Sum volt high protect: 29.0V
Chg overcurrent protect: 25A
DisChg overcurrent protect: 30A
Everything running latest fw available
Latest update: I started a small radiator (200W) and alarm went away. Still, why do I get over 30V from MPPT battery connection points when I measure?
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