The below steps should be followed for connection:
Lighting, short-circuit and other protection measures meeting the local electrical safety laws and regu-
lations are needed before proceeding to AC connection;
Connect the output cables of the solar modules to the DC connector as shown in figure 13. Remove the
isolation layer of the DC cable for about 8-10 mm. Insert the conductor part into the connector at the
appropriate position, crimp the MC4 DC terminal and tighten the nut with a torque of 2.5-3 Nm. Ensure
the poles of solar modules are well connected with the connectors;
After the DC connector is connected, use a multimeter to measure the voltage of the DC input string,
verify the polarity of the DC input cable, and ensure that the voltage of each string is within the allowa-
ble range of the inverter, as shown in picture 13B below.;
4. Connect the DC connector to the inverter and ensure it is tightly fastened.
If you need to remove the connector from the inverter, you can help yourself by inserting a screwdriver
into the connector hole.
PD201808 AEG GRID-TIED THREE-PHASE SOLAR INVERTER (12-30 kW) V.2-18 EN
Only cables qualified according to the local electrical safety laws and regulations and
to the specifications of this manual should be used for connection.
Figure 13B: DC input voltage measuring
Only DC connectors developed for inverters should be used to connect the PV string
to the inverters. No other device should be used, otherwise damages to the product,
unstable operation conditions or fire may occur. Solar Solutions GmbH will not undertake
quality assurance or assume any direct or joint liability thereof.