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Insulation: ON means enable the measurement of impedance between the Array and PE.
Inverter will not connect to the Grid if the insulation measurement is not correct. Depending
on DC wiring conditions, user can set 6 kinds of insulation detecting methods-ON, Positive
Ground, Negative Ground, DC1 only, DC2 only, or Disable.
Figure 6-14 Install Settings Page - Installer Mode
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