Electrical Connection SMA Solar Technology AG
50 SB20_25_30HF-IEN102911 Installation Guide
4. Check the DC plug connector for correct polarity
and connect it. To release the plug connectors see
section 8.2”Disconnect the Inverter from Voltage
Sources” (page60).
5. To create the seal on the inverter, all DC inputs that
are not required must be closed as follows:
– Insert the sealing plugs provided into the DC
plug connectors that are not required.
Do not insert the sealing plugs into the DC
inputs on the inverter.
– Insert the DC plug connectors with sealing plugs
into the corresponding DC inputs on the inverter.
6. Mount the Quick Module, as described in section 5.4”Mounting the Quick Module”
(page32).
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