enphase IQ8 Series User Manual

DATE :
01/06/2023
SHEET:
1 of 1
SCALE:
NTS@A4
DRAWING No: EN-IQ8-1PHN
DRAWING Name: Electrical diagram example: Single-phase IQ8 Series Microinverters grid tied PV system
Q1 1PH+N
Q2 1PH+N
Qn 1PH+N
Consumption measurement CTs installed on Line Conductor
AC cable 3 Core
(L1, N, PE)
6 mm² Minimum recommended
conductor size, see note 4
~ ~ ~~~ ~~
AC cable 2x 2.5mm² (L1, N)
IQ Relay
1PH
~
JB
MCB 1PH+N 20 A
MCB 1PH+N 6 A
Main breaker 1PH+N
PV Sub panel Main Panel
RCD - Consumption 1PH+N See note 8 MCB - Consumption 1PH+N
MCB - Production
1PH+N
40 A
RCD - Production
1PH+N
40 A, 30 mA
See note 8
Production measurement
CT installed on Line
Conductor
Recommended maximum 8
microinverters per IQ Cable section (To
reduce Vrise in cable to <1%)
Single-phase IQ Cable 2x 2.5 mm²
(L1, N)
Array structure earthing where required See note 6
NOTES: 1.These schematics are examples only. These schematics provide recommendations to assist the system designer and installer. 2.The design and installation of the photovoltaic power plant must be carried out in accordance with local electrical standards in the country of installation and must be carried out by competent personnel. 3.Before installing any PV equipment, check the phase-to- neutral voltage at the point of connection. The operating voltage must be within a range acceptable for the 230 V microinverters. 4.When planning the system, you must select the appropriate AC conductor size to minimize voltage rise. Select the correct conductor size based on the distance from the junction with the microinverter AC branch circuit to the circuit breaker in the electrical panel. Enphase recommends a voltage rise total of less than 2% from the start of IQ Cable to the point of supply. . 5.The 2.5 mm² IQ Cable is usually protected by a 20 A B curve circuit breaker. 6. The equipotential bonding between PV module frames, array mounting structure and the metal microinverter mounting brackets must be installed in accordance with local electrical standards.. 7. Optional : PV systems without Lightening Protection LPS are recommended to have Surge Protection devices SPD Type/ Class II installed, if LPS is installed Type/Class I is recommended. SPD's are recommended on all PV circuits greater than 10m in cable length. 8. Enphase microinverters have an integrated High Frequency transformer which provides galvanic separation between DC and AC parts. Where local electrical standards require RCD protection, a Type A device can be used. Refer Techbrief here. 9. Utility meter may be located inside the main panel or as a standalone device.
Maximum microinverters per 20 A circuit: 12x IQ8MC (Considering 1.20 safety factor)
Utility meter See note 9 Utility meter See note 9
kWhkWh
Public electricity network
(Grid Connection)
IQ Gateway
Metered
Communication
Gateway
LoadsLoads
Gateway internet connection: - Ethernet LAN cable - Wi-Fi - Mobile Connect Cellular Modem Gateway internet connection: - Ethernet LAN cable - Wi-Fi - Mobile Connect Cellular Modem
SPD 1PH+N Note 7
SPD
1PH+N
See note 7

enphase IQ8 Series Specifications

General

Brand	enphase
Model	IQ8 Series
Category	Inverter
Language	English