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cONNecTION TO The sMA suNNy IslANd
© TESVOLT We reserve the right to make technical changes. Version RD.TI.015.E.ENG_Installation_Manual_TS48V_v.C.01 Last revised 06/2020
7.2 NUMBER OF APUS FOR VARIOUS APPLICATIONS
High short circuit currents in the SMA Sunny Island due to faulty consumer units can lead to overcur-
rent shutdown in the battery.
Procedure for number of APUs depending on the application
When designing the TESVOLT TS 48 V storage systems, we recommend following the procedure for the
number of APUs given in the following table to ensure stable operation.
APPLICATION
PHASES
NUMBER OF APUS
On-grid
(no back-up power/no backup)
1
1 APU per SMA Sunny Island
3
1 APU per cluster
On-grid with emergency power distribution
(back-up power/backup)
1
1 APU per SMA Sunny Island
3
1 APU per cluster*
Sunny Island system with multi-cluster box
3
2 APUs per cluster
Off-grid
1
1 APU per SMA Sunny Island
3
2 APUs per cluster
Split-phase
2
1 APU per SMA Sunny Island
* Depending on the consumer units (e.g. old motors with high start-up currents), we would recommend 2 APUs per cluster.
7.3 CONNECTING SUNNY ISLAND TO BATTERY INVERTER
DANGER! Life-threatening electric shock or damage to the unit due to incorrect connection.
The valid operating manual for the SMA Sunny Island provides authoritative information on correctly
connecting the SMA Sunny Island. For this reason, the information provided in this manual is entirely
non-binding.
WARNING! Possible damage to the TS 48 V if the installation prerequisites are insufficient.
Installation of the TS 48 V must be complete before the SMA Sunny Island is connected.
NOTE:
When using a Bat fuse
15
/
16
, use the LV DC connecting cable set
5
to connect the
Bat fuse to the SMA Sunny Island.
STOP
