AC cable requirements as follows:

• Conductor type: copper wire

• External diameter: 12 mm to 18 mm

• Conductor cross-section: 5.5 mm² to 8 mm²

• Insulation stripping length: 15 mm

• Sheath stripping length: 50 mm

• The cable must be dimensioned in accordance with the local and national directives for the dimensioning of cables. The requirements for the minimum wire size derive from these directives. Factors influencing cable dimensioning include nominal AC current, cable type, routing method, cable bundling, ambient temperature and maximum desired line losses.

Grounding cable requirements (optional):

Use of fine-stranded conductors

You can use an inflexible or a flexible, fine-stranded conductor.

1. When using a fine-stranded conductor, it has to be double crimped by a ring terminal lug. Make sure that no insulated conductor is visible when pulling or bending. This will ensure sufficient strain relief by means of the ring terminal lug.

• Grounding cable cross-section: max. 8 mm²

Load-break switch and cable protection:

• In PV systems with multiple inverters, protect each inverter with a separate circuit breaker. Make sure to observe the maximum permissible fuse protection ( > Technical Data). This will prevent residual voltage from being present at the corresponding cable after disconnection.

• Loads installed between the inverter and the circuit breaker must be fused separately.

Residual-current monitoring unit:

The inverter does not require an external residual-current device when operating. If local regulations require the use of a residual-current device, the following must be observed:

• The inverter is compatible with residual-current devices that have a rated residual current of 30 mA or higher. Each inverter in the system must be connected to the utility grid via a separate residual-current device.