9
02.2020
INV250 / INV350 / INV500
Due to the PV generator voltage, a higher current
flows on the DC side than on the AC side. As a
result, with the same cable cross-sections and
lengths, the losses on the DC side would be higher.
For this reason, it makes sense to place the inverter
close to the PV module. The cable lengths on the
DC side can thus be kept correspondingly short.
For fastening the inverters under a PV module, we recommend
the use of suitable accessories depending on the mounting
frame, e.g. with slot nuts and M8 screws.
7.1 Installation on PV-racking
For mounting on the frame below the PV modules, observe the
following:
Mark the approximate centre of the PV module on the mounting
profile. Fasten the inverter centred on this marking with the
help of accessories that are matched to the mounting frame.
As an example, slot stones can be fastened to the mounting
profiles at the positions below the inverter brackets with screws.
When mounting, make sure that the inverter is mounted in the
correct installation position:
•
the cover must face upwards
•
connection plugs must point downwards
7.2 Installation alternative
If mounting on the mounting frame below the PV modules is
not possible, another mounting alternative is possible, which is
described below:
For mounting on the wall, the inverter can be mounted with an
appropriate substructure.
The substructure must be designed accordingly to guarantee
sufficient distance to the wall.
8.0 Connections
The following sections describe how to make the AC, DC and
data transmission connections.
When making the connections, the standards
and regulations must be followed, as well as the
safety instructions contained in these operating
instructions.
8.1 Connections overview
The connections of the micro inverter are described below.
8.1.1 Connection ranges of Powerline / NOCOM devices