This document is intended to showcase the settings needed inside the iSolarCloud 3.0 web interface to configure the SH3.0-6.0RS v11/v13 hybrid inverters for UPS use cases, where there is a need for battery charging from the grid whenever the battery SOC is lower than the back-up reserve SOC.
Customers, who do not even have space for PV, can just use the SH3.0-6.0RS as a plain UPS.
Running logics:
Fully charge the battery from the grid - and only discharge it when there is a power outage (useful in cases where no PV are in place).
Discharge the battery down to a certain level also when the grid is available. For example, down to 60% SoC, and when the battery SoC reaches this value, it stops discharging and starts charging up to 100% SoC with energy from PV (there is no meaning to charge the battery from the grid at this stage – this part of the battery capacity is used to increase the self-consumption of the renewable energy coming from PV).
During a power outage, the minimum discharging level will be lower. When the grid comes back, if needed the grid can be set to also be able to charge the battery at the target SoC (e.g. 60% as mentioned before), to make sure that there will always be available energy for the next power outage.
Settings in iSolarCloud 3.0 web interface:
Fully charge the battery from the grid - and only discharge it when there is a power outage
Enable the “Backup Mode”, under Common Parameter Settings: General Settings: Backup Mode
The "Reserved Battery SOC for Off-Grid" parameter will then appear. Set it to 100 (%).
This Reserved Battery SOC cannot be used in daily operation as it is reserved for a power outage.
Enable “Forced Charging”, under Common Parameter Settings: Energy Management Parameters: Forced Charging
Additional Parameters will then appear.
Set the “Forced Charging Valid Time” parameter to Every Day.
Set the “Forced Charging Start Time 1” parameter to 00:00.
Set the “Forced Charging End Time 1” parameter to 24:00.
Set the “Forced Charging Target SOC 1” parameter to 100 (%).
Click on “Apply Settings”.
Whenever there is a power outage, the hybrid inverter will seamlessly switch to backup mode in less than 10 ms, and the battery will be discharged to supply any loads that are connected to the backup-port of the hybrid inverter. When the grid is back, the grid will always also be able to charge the battery back to the Reserved Battery SOC for Off-Grid, whenever the SoC is less than this value.
Please note that:
A new parameter is now also available for the SH3.0-6.0RS, accessible under the Advanced Settings: Battery Parameters
Reminder: only an installer/distributor type of iSolarCloud account has access the Advanced Settings.
It is the “Automatic Recharge to Reserved Battery SOC for Off-grid” parameter.
Whenever this parameter is set to Enable, the grid will always also be able to charge the battery back to the Reserved Battery SOC for Off-Grid, whenever the SoC is less than this value.
Therefore, whenever an installer does the settings, and this parameter is set to Enable, there is no need to enable Forced Charging in step 2 above.
Fully charge the battery from the grid - and only discharge it when there is a power outage
Enable the “Backup Mode”, under Common Parameter Settings: General Settings: Backup Mode
The "Reserved Battery SOC for Off-Grid" parameter will then appear. Set it to 100 (%).
This Reserved Battery SOC cannot be used in daily operation as it is reserved for a power outage.
Enable “Forced Charging”, under Common Parameter Settings: Energy Management Parameters: Forced Charging
Additional Parameters will then appear.
Set the “Forced Charging Valid Time” parameter to Every Day.
Set the “Forced Charging Start Time 1” parameter to 00:00.
Set the “Forced Charging End Time 1” parameter to 24:00.
Set the “Forced Charging Target SOC 1” parameter to 100 (%).
Click on “Apply Settings”.
Whenever there is a power outage, the hybrid inverter will seamlessly switch to backup mode in less than 10 ms, and the battery will be discharged to supply any loads that are connected to the backup-port of the hybrid inverter. When the grid is back, the grid will always also be able to charge the battery back to the Reserved Battery SOC for Off-Grid, whenever the SoC is less than this value.
Please note that:
A new parameter is now also available for the SH3.0-6.0RS, accessible under the Advanced Settings: Battery Parameters
Reminder: only an installer/distributor type of iSolarCloud account has access the Advanced Settings.
It is the “Automatic Recharge to Reserved Battery SOC for Off-grid” parameter.
Whenever this parameter is set to Enable, the grid will always also be able to charge the battery back to the Reserved Battery SOC for Off-Grid, whenever the SoC is less than this value.
Therefore, whenever an installer does the settings, and this parameter is set to Enable, there is no need to enable Forced Charging in step 2 above.
Discharge the battery down to a certain level also when the grid is available.
Enable the “Backup Mode”, under Common Parameter Settings: General Settings: Backup Mode
The "Reserved Battery SOC for Off-Grid" parameter will then appear. Set it to the value (%) of your preference (e.g. 60).
This Reserved Battery SOC cannot be used in daily operation as it is reserved for a power outage.
The lower this value will be, the smaller the battery capacity that will be only available during power outages, and the bigger the battery capacity that will be used to increase the self-consumption of the renewable energy coming from PV.
Click on “Apply Settings”.
Whenever there is a power outage, the hybrid inverter will seamlessly switch to backup mode in less than 10 ms, and the Reserved Battery SOC (e.g. 60%) will be always available for the battery to supply any loads that are connected to the backup-port of the hybrid inverter.
If needed, the grid can be set to also be also to charge the battery at the target SoC (e.g. 60% as mentioned before), to make sure that there will always be available energy for the next power outage.
Enable “Forced Charging”, under Common Parameter Settings: Energy Management Parameters: Forced Charging
Additional Parameters will then appear.
Set the “Forced Charging Valid Time” parameter to Every Day.
Set the “Forced Charging Start Time 1” parameter to 00:00.
Set the “Forced Charging End Time 1” parameter to 24:00.
Set the “Forced Charging Target SOC 1” parameter to the Reserved Battery SOC (%) that has been set in step #1 above (e.g. 60).
Click on “Apply Settings”.
When the grid is back, the grid will always also be able to charge the battery back to the Reserved Battery SOC for Off-Grid, whenever the SoC is less than this value.
Please note that:
A new parameter is now also available for the SH3.0-6.0RS, accessible under the Advanced Settings: Battery Parameters
Reminder: only an installer/distributor type of iSolarCloud account has access the Advanced Settings.
It is the “Automatic Recharge to Reserved Battery SOC for Off-grid” parameter.
Whenever this parameter is set to Enable, the grid will always also be able to charge the battery back to the Reserved Battery SOC for Off-Grid, whenever the SoC is less than this value.
Therefore, whenever an installer does the settings, and this parameter is set to Enable, there is no need to enable Forced Charging in step 2 above.
Additional remarks:
Please note that you can always also set a percentage of the battery capacity that will never be discharged. This “SOC Lower Limit” parameter is accessible under: Advanced Settings -> Battery Parameters -> SOC Lower Limit.
By setting here e.g. 5%, the iSolarCloud interface will display 0% whenever the battery is at 5% SoC.
The recommended value is at 10% to avoid battery going undervoltage when there is low PV production and during night / winter.
The “SOC Upper Limit” parameter, accessible under: Advanced Settings -> Battery Parameters -> SOC Upper Limit, is recommended to be always set at 100% in order to ensure battery balancing.
The amount of battery charging power from the grid can be limited based on the limit (max. current) of the main house circuit breaker. This can be done by setting the “Max. Permitted Charging Power from AC” parameter, accessible under: Advanced Settings -> Energy Management Parameters -> Max. Permitted Charging Power from AC.
A second way to limit the battery charging power from the grid is to set the upper limit for energy purchasing power. This can be done by setting the “Import Power Limit” parameter, accessible under: Advanced Settings -> Power Control -> Import Power Limit. When the energy meter detects a value close to the limit (the limit should be set a little lower than the main house circuit breaker limit) then the hybrid inverter will decrease the battery charging power.
Please always make sure that all the latest FW updates have been applied to the inverter and the battery.
Thank you for choosing Sungrow!