KACO blueplanet gridsave eco 5.0 TR1 - Manual (Page 9)

Safety
Operating instructions for blueplanet-gridsave eco_EN Page 9
3.2 Summary of the components
3.2.1 Battery management
NOTE
Recommendations for setting the appropriate battery can be found in the manufacturer's documen-
tation. Inappropriate settings can have a negative effect on the service life and performance of the
battery, or even destroy it.
The device provides comprehensive setting and control functions to optimise the charging process.
3.2.1.1 Monitoring and control of the battery state of charge (SoC)
When activating the charge status control using the "GS eco link" configuration software, the incoming and outgo-
ing DC currents from the battery must be monitored.
No current shunts are required for the measurement of currents on the device or AC-coupled sources as these are
measured internally. The resulting battery currents are monitored to track the battery's charge status. The accuracy
of the battery charge status is limited by a number of factors, and should only be used as a guideline value. These
factors include the charge and discharge efficiency of the battery.
In off-grid plants, the charge status can be used to start a generator automatically to supply the loads. Excess gener-
ator power is then also used to charge the batteries.
The generator start function can be adjusted individually for usage conditions using an hourly schedule so that the
generator is only used when necessary.
3.2.1.2 Monitoring and control of the battery voltage (sense voltage)
The bidirectional battery inverter measures the battery voltage using the battery sense cables (if installed) directly
onto the battery poles.
By measuring the actual battery terminal voltage (with the battery sense cable), the loss effects are compensated by
the cables meaning that the battery terminal voltage is maintained at or within the specified limit values, regardless
of the charge or discharge voltage.
The battery voltage is used as a guideline value for the automatic starting of the generator and for starting the
charge process of the batteries.
The battery voltage is used to protect the system by shutting down the device if the battery voltage rises or falls
above or below the specified limit values. The shutdown limit values must be set higher than the maximum charg-
ing voltage and lower than the start limit values of the generator.
The lower voltage shutdown limit depends on the discharge current.
However, the device always attempts to start the generator first before it shuts down automatically due to low bat-
tery voltage.
3.2.1.3 Battery charge process
The power management of the device manages the connected power sources of the system. In this process, renew-
able energy sources are preferred over the generator or supply from the grid.
The device monitors all charging sources continuously to charge the batteries in a five-stage charging process. Every
phase or every charging mode is controlled using voltage, current and time settings. For every voltage setting, an
adjustable battery temperature compensation is carried out. These settings are fully configurable using "GS eco link"
and should not normally be changed following the initial installation.
Changes to the default configuration are only permitted by certified and trained installation engineers.