Installation
2–2 975-0335-01-01
Inverter failure due to improper installation will void the inverter warranty.
Consider the following when determining where to install the inverter.
Indoor/
Outdoor
• The inverter uses a Type 3R-rated enclosure (vertical mount only) that
can be mounted indoors or outdoors. (Type 3R enclosures are intended
for outdoor use primarily to provide a degree of protection against
falling rain; and to be undamaged by the formation of ice on the
enclosure.)
• While the 3R-rated enclosure protects the inverter from moisture,
outdoor installations should be located away from lawn sprinklers and
other sources of spray.
• A sun shade is recommended for outdoor installations. In bright sun
conditions, when the inverter is at or near full output with an ambient
temperature above 40 °C (104 °F), shading the unit will help increase
inverter performance. A sun shade can also protect the inverter from
dust, debris, and birds. The sun shade should be made from an opaque
material to provide shade for the heat sink. It should be large enough
and positioned so that it shades the heat sink when the inverter is
operating at full power—usually a four-hour time period centered
around noon. Ensure that the shade is installed according to the
minimum clearances specified on page 2–7.
Orientation
• The inverter must be mounted vertically on a wall or pole.
• Do not mount the inverter horizontally.
• If mounting the inverter indoors on a south-facing wall, ensure the wall
is insulated to reduce the amount of heat absorbed by the inverter.
Unless walls are properly insulated, avoid mounting the inverter
indoors on any wall that is directly exposed to the sun.
Temperature
• Ensure that the inverter is mounted in a location where the ambient
temperature range is -25 to +65 °C (-13 to +149 °F).
• Above 40 °C (104 °F), the inverter may derate power output.
See“Output Power vs. Ambient Temperature” on page A–3 and
“Environmental Specifications” on page A–4.
• At extreme cold temperatures, the front panel LCD may not function
normally.
Ground
Clearance
• Outdoors, the inverter requires at least 100 cm (39 inches) of clearance
between the bottom of the unit and the ground.
Distance
• To minimize resistance and resulting power loss, ensure that wire
lengths between the PV array and the inverter and between the inverter
and the main utility service panel are kept to a minimum.
• Maximum distances will depend on wire gauges used and PV array
output voltages.
Debris free
• Excessive debris (such as dust, leaves, and cobwebs) can accumulate
on the unit, interfering with wiring connections and ventilation. Do not
install in a location where debris can accumulate (under a tree, for
example).
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