User Manual 5 Electrical Installation
25
5.4 Connections
5.4.1 Input Connections
Lethal electric shock or serious burn from high voltage present on PV
string! Observe the following safety instructions related to the wiring
operations:
Before starting wiring, disconnect the cable connection on the end
of the PV string.
Do not use a conventional multimeter to measure the DC voltage. A
multimeter with voltage withstanding of at least 1,500V is
recommended. Otherwise, serious damage may follow.
Respect all safety instructions of the PV module manufacture.
Incorrect cable connection may cause damages to the PV cells, the PVS and
inverter. Respect the following instructions during cable connection:
Connect by strictly following the circuit diagram;
Measure the positive and negative polarity of each string by ammeter with
withstanding voltage no less than 1500V and make sure there is no
reversed connection before cable connection;
Identify the positive pole and negative pole before connection.
Brief Description
There are two types of input terminals: gland waterproof terminals and MC4
terminals.
MC4 Terminal
Step 1 Strip off 10mm insulation layer from the positive and negative DC cable.
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