Microinverter Safety - enphase M250 Installation And Operation Manual

WARNING: Do not connect Enphase Microinverters to the grid or energise 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 centre 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 Equipment Damage. The Enphase Microinverter functions only with a
standard, compatible PV module with appropriate fill-factor, voltage, and current ratings.
Unsupported devices include smart PV modules, fuel cells, wind or water turbines, DC generators,
and non-Enphase batteries, etc. These devices do not behave like standard PV modules, so
operation and compliance is not guaranteed. These devices may also damage the Enphase
Microinverter by exceeding its electrical rating, making the system potentially unsafe.
WARNING: Risk of Equipment Damage. The Enphase Microinverter is not protected from damage
due to moisture trapped in cabling systems. Never mate microinverters to cables that have been
left disconnected and exposed to wet conditions. This voids the Enphase warranty.
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: Some Enphase Microinverter models will not produce power until the Envoy
Communications Gateway is installed and configured with an appropriate grid profile. For
instructions, refer to the Envoy Installation and Operation Manual at http://www.enphase.com.
NOTE: The Enphase Microinverter has field-adjustable voltage and frequency trip points that may
need to be set, depending upon local requirements. Only an authorised installer with the
permission and following requirements of the local electrical authorities should make adjustments.
NOTE: The Enphase Microinverter works with single-phase or three-phase electrical service.
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M-Series Microinverter Installation and Operation
141-00024 Rev 02b