In case of unbalanced SBR battery modules, follow this exemplary balancing and calibration procedure to heal the battery.
EXAMPLE OVERVIEW
Devices: SH10RT V112, SBR128
Initial Situation
SOC jump from 80% to 100% while charging and
SOC jump from 32% to 0% while discharging
iSolarCloud-Settings
COMMON PARAMETER SETTINGS HYBRID (Endcustomer access)
Backup mode: Set to Enable, then Reserved SOC for Backup will show. (No 3)
Reserved SOC for Backup: Set SOC in % of reserved backup power for off-grid use. (No 3-1)
ADVANCED PARAMETER SETTINGS HYBRID (Installer access)
Under Battery Parameters:
Max. Charging (No 4)& Discharging Power (No 5)
SBR096: SBR096 max. charging power should be 4.5 kW but we would lower it to 3 kW to further support the balancing procedure.
SBR096 max. discharging power should be 4.5 kW.
SBR128 and higher SBR power classes: SBR128 max. charging power should be 6 kW but we would lower it to 4.5 kW.
SBR128 max. discharging power should be 6 kW.
SBRxxx: To calculate the charging & discharging power, take min voltage from datasheet and multiply by 30A.
Note: A lower charging power helps to further support the balancing procedure. This is why the charging power during this procedure was even further reduced to a number below the calculated charging power (see above).
Insert the real Battery Capacity (No 6) according to the Datasheet.
E.g. SBR128 → 12,8 kWh
Always set SOC Lower Limit (No 2) to 5% - incorrect value displayed in image.
Under Energy Management Parameters:
Energy Management mode (No 4): Always set to self-consumption mode. - incorrect value displayed in image.
Charging start and discharging start power (No 5 and 6): Set charging & discharging start power to 200W
SBR Balancing & Calibration Procedure
CHARGING PROFILE 27.01.2025-12.02.2025
Balancing & Calibration Cycle: Setting reserved SOC for backup for several days to 95% then set it to 0% and discharge from loads.
FOLLOWED PROCEDURE:
From Jan 28 to Jan 31st set the reserved SOC for backup to 95%.
Afterwards, set reserve SOC to 0%
After 3 days with customer load it was able to fully discharge the battery to 0%
On Feb 3rd put again reserved SOC to 95%.
Note: It took 3 days to reach 95% by itself due to low sun
At February 9th set again reserved SOC to 0%
After the second full discharge just with customer load, the jump is from 6% to 0% (bottom right corner)
Lastly, perform one more cycle and the unbalanced battery modules should be totally healed.
Statement from Manufacturer downloadable here: