Extension Of The Battery; Safety When Extending The Battery; Possible System Configurations; Requirements For Output Voltage And State Of Charge - SMA COMMERCIAL STORAGE SOLUTION 30 System Manual

16 Extension of the Battery

16 Extension of the Battery
16.1

Safety when Extending the Battery

Damage to battery components and inverters due to high balancing currents
When an additional battery cabinet is integrated into an existing battery, different states of charge and different DC
output voltages can cause high balancing currents. High balancing currents can damage battery components and
inverters.
• Before connecting a new battery cabinet to the mains, balance the states of charge and DC output voltages.
Damage to battery components and inverters due to incorrect settings on battery
management systems
When an additional battery cabinet is integrated into an existing battery, incorrect settings on the battery
management systems of the battery cabinets can result in parallel operation of primary battery cabinets. The
parallel operation of primary battery cabinets can result in damage to battery components and the inverter.
• Before connecting a new battery cabinet to the mains, balance the states of charge and DC output voltages.
16.2

Possible System Configurations

The storage system can be extended both in terms of the energy content and the charging and discharging capacity.
Take the specifications relating to the possible system configurations into account (see Technical Information "System
Configuration - SMA Commercial Storage Solution").
Also see:
• Installing an Additional Battery Module ⇒ page 179
• Installing an Additional Battery Cabinet ⇒ page 180
16.3

Requirements for Output Voltage and State of Charge

Before extension of the battery can begin, the battery must meet the following requirements for DC output voltage and
state of charge.
DC output voltage with four battery modules
DC output voltage with five battery modules
DC output voltage with six battery modules
State of charge
DC output voltage with seven battery modules
DC output voltage with eight battery modules
DC output voltage with nine battery modules
DC output voltage with ten battery modules
State of charge
178 ESSX-20-SH-en-10
NOTICE
NOTICE
SMA Solar Technology AG
Storage-30-20
313.4 V to 315.4 V
392 V to 394 V
470.6 V to 472.6 V
20 %
Storage-50-20
549.2 V to 551.1 V
627.8 V to 629.8 V
706.4 V to 707.4 V
785 V to 787 V
20 %
System Manual