REFUsol 20K-2T (853P020.200)
User manual
5.1. Electrical Connection
Figure 5-1: Flowchart for connecting cables to the inverter.
5.2. Grounding Connection (PE)
Connect the inverter to the grounding electrode using ground cable.
REFUSOL 20K-2T (853P020.200) is a transformer less inverter
which requires the positive pole and negative pole of the PV array
are NOT grounded. Otherwise, it will cause inverter failure. In the
PV system, all non-current-carrying metal parts (such as mounting
frame, combiner box enclosure, etc.) should be connected to
earthed.
Preparation: prepare the grounding cable (recommend greater than
4mm
²
yellow-green outdoor cable)
Procedure:
Step 1: Remove the insulation layer with an appropriate length using a wire
stripper shown as figure 5-2
）
Figure 5-2 Grounding connection instruction（1）
Note：the length of L2 should 2~3mm higher than L1
Step 2: Insert the exposed core wires into the OT terminal and crimp them by
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