June 26, 20232 yr Hello Guys I am using Shoto SDA10 48100 model battery with 5kw Tesla Infini V2 inverter. I am facing issue that charging current is not going above 9A in any case ( i mean even when battery is at 80% discharge state) although i have set the it at 40A in Invertor charging settings. What should be the solution?
June 26, 20232 yr 6 hours ago, Muzammil said: Hello Guys I am using Shoto SDA10 48100 model battery with 5kw Tesla Infini V2 inverter. I am facing issue that charging current is not going above 9A in any case ( i mean even when battery is at 80% discharge state) although i have set the it at 40A in Invertor charging settings. What should be the solution? Do you have some charts of battery voltage, battery amps and SOC that you could attach?
June 26, 20232 yr Author Unfortunately, such charts are not available in my Invetor. But you can see inverter settings for battery in attachment. At any battery capacity level, peak charging current never goes up to 9 A. So charging current is between 1A to 9A. I want to know is there any charging limit setting in BMS which can be adjusted to change charging current as we do in Invertor settings?
June 26, 20232 yr Author 1 minute ago, Muzammil said: Unfortunately, such charts are not available in my Invetor. But you can see inverter settings for battery in attachment. At any battery capacity level, peak charging current never goes up to 9 A. So charging current is between 1A to 9A. I want to know is there any charging limit setting in BMS which can be adjusted to change charging current as we do in Invertor settings?
June 27, 20232 yr 14 hours ago, Muzammil said: Unfortunately, such charts are not available in my Invetor. But you can see inverter settings for battery in attachment. At any battery capacity level, peak charging current never goes up to 9 A. So charging current is between 1A to 9A. I want to know is there any charging limit setting in BMS which can be adjusted to change charging current as we do in Invertor settings? I think your charge voltages are set too high for a 15S (48V) battery. I have a 16S (51.2V) battery and I only charge up to 56.4V to reach 100%, I think your battery might be going in to overvoltage protection when it is charging. Take a look at this table from the shoto manual, I know it has 56.4V as the typical value for a 15S battery, but I use the minimum value and it charges fine. You can also see in the bottom table that the BMS will go into overvoltage protection at 54.75V which is below your bulk charge voltage. Your float and cutoff values should be ok, but I'm not sure what a "Back to discharge" setting of 0V might be doing, you should set that to something like 52-53V.
June 27, 20232 yr 16 hours ago, Muzammil said: I agree with jumper, the charge voltage on the inverter seems to high, I would recommend setting it to 54.5V as defined in the battery spec: Then you should see the higher charge current. Also switch off and switch on the battery as it might need that before relaxing the charge current limit after going into protection mode due to the previous voltage being too high.
June 27, 20232 yr Author 1 hour ago, jumper said: I think your charge voltages are set too high for a 15S (48V) battery. I have a 16S (51.2V) battery and I only charge up to 56.4V to reach 100%, I think your battery might be going in to overvoltage protection when it is charging. Take a look at this table from the shoto manual, I know it has 56.4V as the typical value for a 15S battery, but I use the minimum value and it charges fine. You can also see in the bottom table that the BMS will go into overvoltage protection at 54.75V which is below your bulk charge voltage. Your float and cutoff values should be ok, but I'm not sure what a "Back to discharge" setting of 0V might be doing, you should set that to something like 52-53V. Thank you for detailed response. I have set the bulk charge at 54.5V and float at 52.5V. Back to Grid is at is Battery Stop discharging when grid is available. Its at 51V by default in my Invetor setting. I will check the charging behaviour and update you. thanks again
June 27, 20232 yr Author Just now, Muzammil said: Thank you for detailed response. I have set the bulk charge at 54.5V and float at 52.5V. Back to Grid is at is Battery Stop discharging when grid is available. Its at 51V by default in my Invetor setting. I will check the charging behaviour and update you. thanks again Thanks. I will follow and see the charging current with revised settings.
October 23, 20232 yr On 2023/06/26 at 3:39 AM, Muzammil said: Hello Guys I am using Shoto SDA10 48100 model battery with 5kw Tesla Infini V2 inverter. I am facing issue that charging current is not going above 9A in any case ( i mean even when battery is at 80% discharge state) although i have set the it at 40A in Invertor charging settings. What should be the solution? Any update ? I have the same issue here with the 15S model, the charge current doesn't go higher than 10A
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