3 System Installation
29
Crimp MC4 terminal step
The input cable needs to be crimped into the MC4 terminal for connection to the string inverter PV+/PV-
terminals. Before operation, ensure that “
3.6.4 Preparation before Operation
” has been completed.
1. The positive and negative poles of the input cable are determined and identified.
Note: Please do not judge the positive and negative according to the cable color in this manual. Be sure to take the
actual measurement as the standard.
2. Use a wire stripper to strip the wire.
Stripping length
requirement
positive
negative
Figure 3-15 Stripping
3. According to the correct polarity, crimp the cable to the corresponding core.
Crimp
method
Positive
Negative
Figure 3-16 Crimp terminal
4. With the correct polarity, insert the core into the male and female ends of the MC4 connector
and tighten the connector back cover.
Positive
Negative
Figure 3-17 Assembly connector
Insert MC4 terminal
Insert the positive and negative connectors into the positive and negative terminals of the DC input
terminal of the inverter until you hear a “click”, indicating that the terminal is stuck in place.
CAUTION
After the cable connection of the string inverter is completed, check if there is a gap at the waterproof lock. If
there is a gap in the waterproof lock, use a fireproof mud to block the gap. If there are unconnected input
terminals, seal the unconnected input terminals.
-- This chapter end --
