Operating Manual

Installation, assembly and commissioning for
the first time
Version 1.1 Page 66 of 92
Important:
1. Set the “address” (device address) to “2” and configure the battery parameters by clicking on “set address”.
2. In a group of multiple BMZ ESS 7.0 batteries connected in parallel, only one battery may have the address “2”.
3. Configure a unique and unambiguous address (device address) for all other slave batteries.
4.14 Commissioning the parallel connection of multiple batteries
4.14.1 Switch-on sequence
1. At the time of commissioning, first switch on the master battery.
2. Check whether the main relay of the master battery is switched on
-> Check via LED flashing speed (see section 5.1) or BMZ service tool (see section 4.4)
3. If the main relay of the master battery is closed, you can now switch on other slave batteries.
4.14.2 Stand-by mode of a slave battery:
When you switch on the slave batteries, the batteries are automatically in the stand-by mode. (The stand-by mode is
indicated by a green flashing LED) Only when the master sends a switching signal for the main relay of the slave
battery, the main relay of the slave battery is switched on. The slave battery can be used the complete battery system
only after this.
4.14.3 Switch-on criterion of the slave battery:
Each battery compares the internal battery voltage with the externally applied voltage through a measurement.
Figure 4-33: block circuit diagram of the BMZ ESS slave battery
If the voltage automatically measured by the battery at the master battery differs from the slave battery voltage by
less than +/-100 mV, the slave battery switches off automatically.