6.
Damage to the inverter due to moisture ingress
The inverter is only properly sealed when all unused DC inputs are closed with DC connectors
and sealing plugs.
• Do not insert the sealing plugs directly into the DC inputs on the inverter.
• For unused DC connectors, push down the
clamping bracket and push the swivel nut
up to the thread.
• Insert the sealing plug into the DC
connector.
• Tighten the DC connector (torque: 2 Nm).
• Insert the DC connectors with sealing plugs into the corresponding DC inputs on the
inverter.
☑ The DC connectors snap audibly into place.
7. Ensure that all DC connectors are securely in place.
6.4.3
Retrofitting the Surge Arrester Type II
The inverter is equipped ex works with surge arresters or it can be retrofitted (see Section 11
"Accessories", page 41).
1.
Danger to life due to high voltages
• Disconnect the inverter from all voltage sources (see Section 9, page 34).
• Wait 20 minutes before you remove the DC protective cover to allow residual voltages to
discharge.
6 Electrical Connection
SMA Solar Technology AG
Operating Manual
STP20-25TL-BE-en-10
26
