Step 5: Attach The Microinverters To The Pv Racking - enphase C250 Installation And Operation Manual

Step 5: Attach the Microinverters to the PV Racking

a. Mark the approximate centers of each PV module on the PV racking.
b. Evaluate the location of the microinverter with respect to the PV module DC junction box or
any other obstructions.
c. Ensure that the microinverter does not interfere with the PV module frame or stiffening
braces.
d. Ensure that the connector from the microinverter can easily reach the connector on the
Engage Cable.
e. Allow a minimum of 1.9 cm (0.75 inches) between the roof and the bottom of the
microinverter. Also allow 1.3 cm (0.50 inches) between the back of the PV module and the
top of the microinverter.
WARNING: Risk of equipment damage. You must install the microinverter 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.
f. Mount one microinverter at each location
using suitable hardware. The indicator
light on the underside of the
microinverter will be facing the roof.
NOTE: Do not install the
microinverter black side up or
vertically, with the DC connectors
facing up.
g. Torque the microinverter fasteners to the
values shown. Do not over torque.
•
6 mm (1/4") mounting hardware: 5 N m (45 to 50 in-lbs)
•
8 mm (5/16") mounting hardware: 9 N m (80 to 85 in-lbs)
NOTE: Using a power screwdriver to tighten the mounting hardware is not recommended
due to the risk of thread galling.
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C250 System Installation and Operation
141-00025 Rev 03