© 2021 Hoymiles Power Electronics Inc. All rights reserved.
10
Single-phase Microinverter User Manual
5.3 Required Space Distance
If the microinverters are installed on
a concrete roof or steel roof, their
communication with the DTU may be
slightly affected. Under such installation
conditions, it is better for the microinverters
to be installed 50 cm above the roof.
Otherwise, more DTUs may be required to
ensure communication quality between the
DTUs and the microinverters.
Ground
50 cm
5.4 Grounding Considerations
This microinverter is a Class I equipment with a basic isolation transformer, and this microinverter must be
earthed. There is an earth wire inside the AC cable, so usually grounding can be done by directly using this
wire. If the utility has any special requirements, grounding can be done by affixing the mounting bracket to
the racking.
5.5 Preparation
Installation of this equipment is carried out based on the system design and the place in which the
equipment is installed.
• Installation must be carried out with the equipment disconnected from the grid (power disconnect switch
on) and with the PV modules shaded or isolated.
•
Refer to the Technical Data to ensure that the environmental conditions fit the requirements of the
microinverter (degree of protection, temperature, humidity, altitude, etc.)
• To avoid power de-rating due to an increase in the internal temperature of the microinverter, do not
expose it to direct sunlight.
•
To avoid overheating, always make sure that the air flow around the microinverter is not blocked.
•
Do not install in places where gases or flammable substances may be present.
• Avoid electromagnetic interference that can compromise the correct operation of electronic equipment.
When choosing the installation position, comply with the following conditions:
•
Only install on structures specifically
conceived for PV modules (supplied by
installation technicians).
• Install the microinverter underneath the
PV modules to make sure that it operates
in a shaded or shadowed environment.
If this condition cannot be met, it may
trigger the microinverter production de-
rating.
Fig.1 Microinverter installation position
