Opening The Wiring Cover; Connecting The Pv Input Cable - Goodwe MS Series User Manual

User Manual V1.0-2022-08-20

6.3 Opening the wiring cover

• The wrench for opening the inverter lower case cover is distributed with the inverter. After
removing the inverter lower case cover, please keep the wrench and fastening screws
properly for later use.
• If you need to open the inverter cover in rain or snow, please take protective measures
to prevent rain or snow from entering the maintenance chamber. If it is not able to be
guaranteed, do not open the inverter cover.
• It is forbidden to open the inverter upper case cover.

6.3 Connecting the PV Input Cable

INSTRUCTIONS PERTAINING TO A RISK OF FIRE OR ELECTRIC SHOCK
• Do not connect one PV string to more than one inverter at the same time. Otherwise, it
may cause damages to the inverter.
• Confirm the following information before connecting the PV string to the inverter.
Otherwise, the inverter may be damaged permanently or even cause fire and cause
personal and property losses.
1. Make sure that the max short circuit current and the max input voltage per MPPT are
within the permissible range.
2. Make sure that the positive pole of the PV string connects to the PV+ of the inverter. And
the negative pole of the PV string connects to the PV- of the inverter.
• The PV strings cannot be grounded. Ensure the minimum insulation resistance of the
PV string to the ground meets the minimum insulation resistance requirements before
connecting the PV string to the inverter (R > 100kΩ). If the insulation resistance value is ≤
100kΩ, it will trigger the insulation resistance alarming in the inverter.
• The unit is not provided with an isolation transformer and is intended to be installed per
NFPA 70, 690.35 with an ungrounded PV array.
NOTICE
DANGER
WARNING
21
06 Electrical Connection