Microinverter Safety - enphase C250 Installation And Operation Manual

WARNING: Risk of electric shock. Risk of fire. Only qualified personnel should troubleshoot, install,
or replace Enphase Microinverters or the Engage Cable and Accessories.
WARNING: Risk of electric shock. Risk of fire. Ensure that all AC and DC wiring is correct and that
none of the AC or DC wires are pinched or damaged. Ensure that all AC junction boxes are
properly closed.
WARNING: Risk of electric shock. Risk of fire. Do not exceed the maximum number of
microinverters in an AC branch circuit as listed in the manual. You must protect each microinverter
AC branch circuit with a 20A maximum breaker.
WARNING: Do not connect Enphase Microinverters to the grid or energize the AC circuit(s) until
you have completed all of the installation procedures and have received prior approval from the
electrical utility company.
NOTE: To ensure optimal reliability and to meet warranty requirements, the Enphase Microinverter
System must be installed according to the instructions in this manual.
NOTE: The AC and DC connectors on the cabling are rated as a disconnect only when used with
an Enphase Microinverter.
NOTE: Protection against lightning and resulting voltage surge must be in accordance with local
standards.
NOTE: Many PV modules have a central stiffening brace. In these cases, do not position the
connector and microinverter at the exact center of the PV module. Instead, position the drop
connectors so that the connectors do not conflict with the braces.
NOTE: Completely install all microinverters and all system AC connections prior to installing the PV
modules.

Microinverter Safety

WARNING: Risk of Skin Burn. The body of the Enphase Microinverter is the heat sink. Under
normal operating conditions, the temperature is 15°C above ambient, but under extreme conditions
the microinverter can reach a temperature of 80°C. To reduce risk of burns, use caution when
working with microinverters.
WARNING: Risk of electric shock. Risk of fire. If the AC cable on the microinverter is damaged, do
not install the unit.
WARNING: Risk of electric shock. Risk of fire. Do not attempt to repair the Enphase Microinverter;
it contains no user-serviceable parts. If it fails, contact Enphase customer service to obtain an RMA
(return merchandise authorization) number and start the replacement process. Tampering with or
opening the Enphase Microinverter will void the warranty.
WARNING: Risk of Fire. When pairing with C250, the PV module DC conductors must be labeled
"PV Wire" or "PV Cable".
WARNING: Risk of Equipment Damage. You must match the DC operating voltage range of the PV
module with the allowable input voltage range of the Enphase Microinverter.
WARNING: Risk of Equipment Damage. The maximum open circuit voltage of the PV module must
not exceed the specified maximum input DC voltage of the Enphase Microinverter.
WARNING: Risk of Equipment Damage. The microinverter must be installed under the module, out
of rain and sun. Do not mount the microinverter in a position that allows long-term exposure to
direct sunlight or in a vertical orientation that allows water to collect in the DC connector recess. Do
not install the microinverter black side up or vertically, with the DC connectors facing up.
WARNING: Be aware that only qualified personnel may connect the Enphase Microinverter to the
utility grid.
NOTE: Enphase Microinverters have field-adjustable voltage and frequency trip points that may
need to be set, depending upon local requirements. Only an authorized installer with the
permission and following requirements of the local electrical authorities should make adjustments.
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 2015 Enphase Energy Inc. All rights reserved.
C250 System Installation and Operation
141-00025 Rev 03