Lightning And Surge Suppression - enphase IQ8X Installation And Operation Manual

Standard guidelines for voltage rise on feeder and AC branch circuit conductors might not be sufficient for
microinverter AC branch circuits that contain the maximum allowable microinverters. This is due to the high inherent
voltage rise on the AC branch circuit.
Best practice: Center-feed the branch circuit to minimize voltage rise in a fully populated branch. This
practice greatly 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 traditional 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. Enphase has tested the following devices:
•
Leviton 51110-SRG
•
Schneider SquareD HEPD50
NOTE: Protection against lightning and resulting voltage surges must be per local standards.
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IQ8MC, IQ8AC, IQ8HC, and IQ8X Microinverters Installation and Operation Manual
© 2023 Enphase Energy Inc. All rights reserved. November 2023
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