SMA SMC 9000TL Installation - Manual (Page 38)

38 SMC9-11TLRP-IA-en-51 Installation Manual
6 Electrical Connection SMA Solar Technology AG
Funkt.Titel_Anforderungen an die PV-Module
Requirements for the PV modules:
☐ All PV modules must be of the same type.
☐ The same number of series-connected PV modules must be connected to all strings.
☐ All PV modules must be aligned identically.
☐ All PV modules must have the same tilt angle.
☐ The maximum input current per string must be maintained and must not exceed the through-fault
current of the DC connectors (see section 12 "Technical Data", page 82).
☐ The thresholds for the input voltage and the input current of the inverter must be observed
(see section 12 "Technical Data", page 82).
☐ At an ambient temperature over 10°C, the open-circuit voltage of the PV modules must not
exceed 90% of the maximum input voltage of the inverter. That prevents the voltage exceeding
the maximum input voltage of the inverter at lower ambient temperatures.
☐ The positive connection cables of the PV modules must be equipped with the positive DC
connectors.
☐ The negative connection cables of the PV modules must be equipped with the negative DC
connectors.
Wichtig_Parallelschaltung mit Y-Adapter
6.4 DC Connection
6.4.1 Conditions for DC Connection
Use of Y adaptors for parallel connection of strings
The Y adaptors must not be used to interrupt the DC electric circuit.
• Do not use the Y adaptors in the immediate vicinity of the inverter. The adaptors must not
be visible or freely accessible.
• In order to interrupt the DC electric circuit, disconnect the inverter (see section 9).
6.4.2 Assembling the DC Connectors
Figure 13: DC connectors
Item Designation
A Negative DC connector
B Positive DC connector