iMars grid-tied solar inverters Installation
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4.4.1 Connection of solar modules
Figure 4.15 Connection between DC connector and solar modules
Connection steps:
(1) Lighting, short-circuit and other protection measures which meet the local electrical safety
laws and regulations are needed before the AC connection;
PV strings can be connected to inverter only after protection measures which
conform to local electrical regulations are taken and the technical parameters in
this manual are fulfilled.
(2) Connect the output cables of solar modules to the DC connector of inverter as Figure 4.15
shows. Remove the isolation layer of the DC cable f or about 8-10mm. Insert the conductor
part into the appropriate position of the connector, crimp the MC4 DC terminal and tighten
the nut with a torque of 2.5-3Nm. Ensure the poles of solar modules are correctly and well
connected with the connectors.
(3) 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 allowable range of the inverter, as shown in Figure 4.16.
