SMA SUNNY ISLAND 4548-US Operating Manual page 119

SMA Solar Technology America LLC 14 Connecting External Sources
Sunny Island Connected in Parallel to a 120 V Generator
Sunny Island in the Split-Phase System connected to a 240 V Generator
Generally, the internal transfer relays of the slaves close only if the internal relay of the master is
closed.
Plants with master and slave unit on one battery (cluster operation) will keep on working if one slave
fails. If the master fails, the whole cluster stops its operation.
Operating Manual SI4548-6048-US-BE-en-21 119