3. SERVICE TASKS
Please go through the general steps beforehand, see chapter 1.
3.1 BCU replacement
Have you detected a faulty BCU?:
After replacing the BCU, please do not forget to re-do the configuration in the web interface (enter the number of
modules and inverter brand) and install the latest BCU software approved for the inverter.
3.2 Module Replacement
Have you detected a faulty module?:
In the meantime you can use the battery system with the remaining modules and a correspondingly reduced
capacity (take into account the minimum number of modules).
Please note: It is important that all modules of a battery tower have a similar state of charge (SOC) with a
tolerance of 5%. New modules have about 35% SOC. If the remaining modules have not yet been put into
operation (not charged / discharged), the new module can easily be added. Otherwise, it is basically a module
extension. In this case, please add the new module to the system only when the system has a SOC between 30%
and 40% (see extension manual).
3.3 Charging with external HV charger
You will receive a charger from us (eg because of the message "Cell_UV")?
Each module should be individually connected to the charger and charged to the same state of charge (SOC).
The charger has a display in which you can set the desired SOC. It's enough if you select 10% SOC. It is very
important that all modules receive exactly the same amount of energy and come to the same SOC level. Please
pay attention to the display or charging time. Before charging, the module must have been at rest for at least 30
minutes. If the charging process is interrupted, then you have to wait at least 30 minutes before the module can
be recharged. (Otherwise the SOC will not be correct)
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