Darfon G320 Manuale d'uso - Pagina 6

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G 3 2 0

M i c r o

I n v e r t e r

• Torque wrench & sockets for mounting hardware

• Adjustable/open-ended wrench (for end caps)

Compatibility and Capacity

G320 micro inverters are electrically compatible with PV modules that have a

voltage range of 24V to 60V and a maximum wattage of 350W although 320

watts is considered optimal. Please refer to the 'Compatible PV Module

Calculator' on the website at www.darfonsolar.com to verify the PV module is

electrically compatible.

Before ordering the PV module, make sure the connector type is compatible with

the micro inverter.

Electrical Compatibility

Model

PV MPPT Voltage Range

PV Module Connector Type

G320

24V to 45V

MC4 Locking

[Male-Anode (+), Female-Cathode (-)]

Voltage and Capacity

AC Trunk Cable

Overcurrent Protection

10AWG

30Amp Breaker

12AWG

20Amp Breaker

WARNING

DO NOT exceed the maximum

number of micro inverters in

an AC branch circuit as listed above.

AC Trunk Cable

There are different types and options for AC trunk cables. Depending on the

orientation of the installation, the AC trunk cable can be in portrait or landscape

format. Trunk cables can also consist of three pins (three wires) or four pins (four

wires). Currently the four-pin AC trunk cable is used.

Manuals-non monitoring system(for BD use)-08023

G 3 2 0 + 1 T c a b l e U s e r

240V (Single Phase)

19 MI

12 MI

CAUTION

Each AC branch circuit must be

protected by a dedicated circuit

breaker of 30A or less if using 10 AWG trunk

cable, or 20A or less if using 12 AWG trunk cable.

Wire Color

Wire Usage

Black

Red

Green

Ground

White

Neutral

Grounding Options

Option 1: Integrated Grounding

Integrated grounding eliminates the need to install Grounding Electrode

Conductor (GEC) to each G320 by completely isolating the internal DC circuit

from the AC circuit and ground. DC ground faults are detected on either the

positive and/or negative conductors of the DC circuit by a Ground Fault Detection

Interrupter Insulation Monitor (GFDI IM). If the GFDI IM detects a ground fault

has occurred to the PV input, the micro inverter will automatically disconnect all

conductors and cease supplying output power. In accordance with NEC 690.35,

installers can build ungrounded arrays where only an Equipment Grounding

Conductor (EGC) is required to connect or bond non-current carrying metal

equipment together. The EGC grounding process is completed via the grounding

connection of G320 4-wire AC cable to the AC trunk cable. The PV module will

still need to be grounded according to the module manufacturer's instructions.

INTEGRATED GROUNDING

METER

Black=L1

White=Neutral

Red=L2

Green=Ground

2-POLE 30A

CIRCUIT

JUNCTION

BREAKER

BOX

NEUTRAL

GROUND

AC DISTRIBUTION PANEL

Option 2: GEC Grounding

Although the G320 offers integrated grounding (UL 1741 certified), it also comes

with a grounding terminal clip for any localities that do not accept integrated

grounding. The micro inverter manufacturer will not be held responsible for

improper installations that do not have local AHJ and/or Utility operational

approval.

U s e r

M a n u a l

UP TO 19 MICROINVERTERS IN A CIRCUIT

INTEGRATED GROUNDING

(GEC NOT REQUIRED)

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