Connecting the PV Array

Qualified person

NOTICE

Damage to the inverter due to ground fault on DC side during operation

Due to the transformerless topology of the product, the occurance of ground faults on DC side during operation can lead to irreparable damage. Damages to the product due to a faulty or damaged DC installation are not covered by warranty. The product is equipped with a protective device that checks whether a ground fault is present during the starting sequence. The product is not protected during operation.

  1. Ensure that the DC installation is carried out correctly and no ground fault occurs during operation.

NOTICE

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 due to overvoltage.

  1. If the open-circuit voltage of the PV modules exceeds the maximum input voltage of the inverter, do not connect any strings to the inverter and check the design of the PV system.

NOTICE

Destruction of the measuring device due to overvoltage

  1. Only use measuring devices with a DC input voltage range of 1000 V or higher.

NOTICE

Damage to the DC connectors due to the use of contact cleaner of other cleaning agents

Some contact cleaners or other cleaning agents may contain substances that decompose the plastic of the DC connectors.

  1. Do not use contact cleaners or other cleaning agents for cleaning the DC connectors.

Procedure:

  1. Ensure that the circuit breaker is switched off from all three line conductors and that it cannot be reconnected.
  2. Ensure that there is no ground fault in the PV array.
  3. Check whether the DC connectors have the correct polarity.

    4. If the DC connector is equipped with a DC cable of the wrong polarity, the DC connector must be configured again. The DC cable must always have the same polarity as the DC connector.

  4. Ensure that the open-circuit voltage of the PV array does not exceed the maximum input voltage of the inverter.
  5. Connect the assembled DC connectors to the inverter.
  6. The DC connectors snap into place.

  7. NOTICE

    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.

    1. Do not insert the sealing plugs directly into the DC inputs on the inverter.
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    2. For unused DC connectors, push down the clamping bracket and push the swivel nut up to the thread.
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    3. Insert the sealing plug into the DC connector.
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    4. Tighten the DC connector (torque: 2 Nm).
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    5. Insert the DC connectors with sealing plugs into the corresponding DC inputs on the inverter.
    6. The DC connectors snap into place.
    7. Ensure that all DC connectors are securely in place.
    <  Requirements for the DC Connection
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