Aux Wiring: Generator Control - enphase IQ System Controller 3 Quick Install Manual

Section C - Wiring
IQ System Controller 3G -

Aux wiring: Generator control

An auto-start generator can be integrated with the Enphase Energy
System without the need for any external automatic transfer switch
(ATS).
To view the full list of supported generators and more details see
Generator Integration Tech
1. Install generator CTs (CT-200-CLAMP or CT-200-SPLIT) on the L1 and
L2 wires from the generator and follow instructions in the CT wiring
section to ensure power monitoring when the generator is running.
2. Use the Enphase Installer App to commission and program
IQ System Controller 3G to control the generator.
IQ System Controller 3/3G Quick Install Guide
Brief.
Generator
240 V Line
Generator
240 V Line
Backup
Panel
2 Wire
Signal
Backup
Panel
120 V for
generator
battery
charger
2 Wire Signal
12 VDC
Power Source
Utility
Sense
120 V
for
power
120 V for generator 240 V line
battery charger for Utility
Sense
• For 2-wire autostart generators, wire the
generator I/O port in IQ System Controller 3G
to the 2-wire remote start terminals of the
generator.
• For utility sense generators, wire the input of
a 12 V DC power supply to the backup loads
panel.
• Wire one end of the DC power supply
output to one of the terminals of the
generator auxiliary contact (NO3) on the
IQ System Controller 3G.
• Wire the other terminal of the generator
auxiliary contact (NO3) to the coil of an
external normally closed (NC) power relay.
• Wire the other end of the DC power supply
output to the other end of the coil of the
normally closed (NC) power relay.
• Wire one terminal of the external normally
closed (NC) power relay to one of the poles
of a double pole breaker on the backup
loads panel.
• Wire the other terminal of the external
normally closed (NC) power relay to one of
the utility sense terminals on the generator
through a fuse.
• Wire the 2 pole of the double pole breaker
nd
on the backup loads panel to the 2
sense terminal on the generator via a fuse.
NOTE: Control lines to headers support 28 AWG and
16 AWG wire gauges.
Refer to the technical brief and user guides for
detailed instructions on generator integration, see
the Generator Support page at
installers/storage/generator. Always follow generator
installation and operation instructions from the
generator manufacturer.
utility
nd
https:/ /enphase.com/
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