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damagetheunit.
` Checksshort‐circuitcurrentofthePVstring.Thetotalshort‐circuitcurrent
ofthePVstringcannotexceedtheinverter’smaximumDCcurrent.
` HighvoltageexistswhenthePVpanelisexposedtothesun.Pleasesecure
the terminal connection, and do NOT touch any exposed components in
caseofelectricshock.
` If you choose the models without DC switch an external disconnection
device should be used. It should be multi‐poleswitch‐disconnector (all
poles disconnected simultaneously), which has been approved according
to standard IEC/EN 60947‐3. The rated current should be between 20A
and25A.
` PVarrayshouldnotbeconnectedtothe groundingconductor.
` The minimum arra y insulation resistance to ground that system designer
or installer must meet when selecting the PV panel and system design,
based on the minimum value that the design of the PV functional
grounding in the in
verter was based on. The minimum value of the total
resistance33.3kΩthatthesystemmustmeet.
There is a risk of shock hazard if the total minimum resistance
requirementisnotmet.
3.4.3 RS485Communication
RS485 interface is used for multipoint communication. EzLogger can
monitor and communicate with 20 invert ers at the same time. But the
maximum length of the cable should not exceed 800 m. All the inverters
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