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NOTE: * Refer to local regulations for overcurrent protection device (OCPD) sizing and to
define the number of microinverters per branch in your area.
** This breaker option is not available in Europe.
Electricity network requirements
The IQ8P Microinverters work with single-phase or multi-phase grid connections. Measure AC line
voltages at the point of connection to confirm that it is within the ranges shown:
Single-phase service
L1 to N
184 to 276 VAC
Conductor lengths and voltage rise
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% for the sections from the microinverter AC branch circuit to the circuit breaker
in the electrical panel.
Best practice: Center-feed the branch circuit to minimize voltage rise in a fully populated
branch. This practice substantially reduces the voltage rise as compared with an end-fed
branch. To center-feed a branch, divide the circuit into two sub-branch circuits protected
by a single OCPD.
Lightning and surge suppression
Enphase microinverters have integral surge protection, greater than most conventional inverters.
However, if the surge has sufficient energy, the protection built into the microinverter can be
exceeded, and the equipment can be damaged. For this reason, Enphase recommends that you
protect your system with a lightning and/or surge suppression device. In addition to having some
level of surge suppression, it is also important to have insurance that protects against lightning and
electrical surges.
NOTE: Protection against lightning and resulting voltage surge must be by local
electrical codes and standards.
Labelling
A label on the distribution board of the premises where the embedded generator is connected, as
shown in the below figure, or a similar warning. Disconnection points for all supplies must be
indicated.
The label shall be permanent with lettering of a height of at least 8 mm.
The label shall comply with the requirements of SABS 1186-1.
Example of labelling (more isolation points to be added as required)
12
IQ8P Microinverter Installation and Operation Manual
L1 to L2 to L3
L1, L2, L3 to N
© 2023 Enphase Energy Inc. All rights reserved.
Multi-phase service
319 to 478 VAC
184 to 276 VAC
September 2023
IOM-00001-1.0
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