Solar module connections

DANGER

Risk of death due to electrical shock and discharge!

The PV generators/cables may be live as soon as they are exposed to light.

WARNING

Serious burns due to arcs on the DC side!

During operation, dangerous arcs can occur when pulling or plugging the DC connections.

Before connecting the DC connectors, de-energise the DC side. DC switches must be in the OFF position.

WARNING

Risk of fire due to improper installation!

Incorrectly fitted plugs and sockets may heat up and cause a fire.

During installation, be sure to follow the manufacturer's requirements and manual. Properly mount plugs and sockets.

POSSIBLE DAMAGE

Risk of damage to the inverter due to PV modules connected with the wrong polarity

PV modules connected with the wrong polarity may cause thermal damage to the inverter.

• Measure the DC cables of the PV modules and connect to inverter with the correct polarity.
• Comply with the maximum input current per string for the inverter as stated in the technical data.
• The maximum input current must not be exceeded, even when using Y or T plugs.

• Our planning tool KOSTAL Solar Plan should be used to optimally configure the solar modules and achieve the highest possible yields.
• Check the planning and the wiring of the modules for plausibility.
• Measure and record the DC idling voltage and polarity of the PV modules. The idling voltage of the PV modules must be in the voltage range between U_DCstart and U_DCmax.

• Make sure that the maximum short-circuit current of the PV modules is less than the permitted value.
• Make sure that the PV modules are not short-circuited.
• Make sure that the inverter is closed when the PV modules are connected.
• Make sure that when connecting several inverters there is no cross-connection of the PV modules.