Surge Suppression In Commercial Systems - enphase IQ8D-72-E-US Design Manual

Surge Suppression in Commercial Systems

Surges can occur anywhere on the electrical grid. Enphase Microinverters, like all electrical components, can be damaged
by voltage surges from the electrical grid. The guidelines in this section help to minimize any surge-related issues in your
commercial installation. Enphase recommends that you protect your system with surge suppression devices. Enphase
Microinverters have integral surge protection. However, if the surge has enough energy, the protection built into the
Microinverter can be exceeded and the equipment may be damaged.
Surge suppression devices protect site loads from electrical surges and can be installed in parallel or in-line. An inline surge
protective device provides the greatest level of protection but is often more expensive than a surge protective device that is
placed in parallel to the Microinverter panel board and will likely filter the power line communications in a system.
If using an inline surge protective device, then the IQ8D Commercial Gateway and Microinverters must be located together
on the load side of this device
A panel level surge suppressor interrupts the circuit and isolates equipment from the source of the surge. There are a
wide range of devices available from equipment manufacturers with a range of warranties. Enphase does not warrant or
guarantee the performance of any of these products. In addition to having some level of surge suppression, it is important
to have insurance that protects against electrical surges. Install protective devices per vendor instructions.
Examples
Citel DS73RS-120 surge protector; data sheet
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