Installing Dc Input Power Cables - Huawei SUN2000 L1 Series Quick Manual

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To remove the AC connector, perform the operations in reverse order of installing the AC
connector. Then, remove the plug insert, as shown in the following figure.
Plug insert
3.5

Installing DC Input Power Cables

1. Ensure that the PV module output is well insulated to ground.
2. Use the Staubli MC4 positive and negative metal terminals and DC connectors supplied with the
solar inverter. Using incompatible positive and negative metal terminals and DC connectors may
result in serious consequences. The caused device damage is not covered under warranty.
3. The DC input voltage of the solar inverter must not exceed maximum input voltage.
4. Before installing DC input power cables, label the cable polarities to ensure correct cable
connections.
5. If DC input power cables are reversely connected, do not operate the DC switch as well as
positive and negative connectors immediately. Failing to do so may cause device damage,
which is not covered under warranty. Wait until the solar irradiance declines at night and the PV
string current reduces to below 0.5 A, and then turn off the DC switch and remove the positive
and negative connectors. Correct the string polarity before reconnecting the PV string to the
solar inverter.
8

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