SMA · Sunny Boy SB5000TL-21
Can I add a battery to an SMA SB5000TL-21?
This exact Australian Sunny Boy is a legacy PV inverter, not a modern battery hybrid. SMA's Australia-only SB5000TL-21 datasheet establishes the model identity; SMA separately documents AC-coupled storage architectures using dedicated battery inverters.
Retrofit implication
A working SB5000TL-21 can therefore be assessed as the PV side of an AC-coupled storage retrofit rather than being assigned an invented native battery list. That does not certify any particular third-party battery with the existing inverter.
Backup
Backup belongs to the separate storage architecture and its switching/protection design. It cannot be inferred from the Sunny Boy model alone.