Operating Manual SB3-5TL-21-BE-en-10 31
SMA Solar Technology AG 6 Electrical Connection
6.4.2 Connecting the PV Array
WaHiw_Leerlaufspannung darf max. Eingangsspannung nicht überschreiten
1. Ensure that the circuit breaker is switched off and ensure that it cannot be accidentally
reconnected.
2. If an additional DC load-break switch is available, switch off the DC load-break switch and
secure against re-connection.
3. If the ESS is in use and plugged in, remove the ESS.
4. Ensure that there is no ground fault in the PV array.
5. Check whether the DC connector has the correct polarity.
If the DC connector is equipped with an DC cable having the wrong polarity, the DC connector
must be assembled again. The DC cable must always have the same polarity as the DC
connector.
6. Ensure that the open-circuit voltage of the PV array does not exceed the maximum input voltage.
7. Connect the assembled DC connectors to the inverter.
☑ The DC connectors click audibly into place.
8. Ensure that all DC connectors are securely in place.
Destruction of the inverter due to overvoltage
If the open-circuit voltage of the PV modules exceeds the maximum input voltage of the inverter,
the inverter can be destroyed by the overvoltage.
• If the open-circuit voltage of the PV modules exceeds the maximum input voltage of the inverter,
do not connect any PV strings to the inverter and check the design of the PV system.
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