EN
35
5.2.6 Wi-Fi signal environmental checks
The inverter can be commissioned and monitored using the Wi-Fi
communication channel. The WLAN board of the inverter uses
radio waves to transmit and receive data. It is therefore important
to assess this factor in order to have an optimal installation.
• Walls made in reinforced concrete and surfaces covered with
metal (doors, shutters, etc.) might significantly reduce the reach
of the device which, even in optimal conditions, is approximately
40 metres in free space.
• Before installing the inverter it is therefore recommended to
check the strength of Wi-Fi signal by means a mobile device
(smartphone, tablet or notebook) by connecting it to the Wi-Fi
router from a position which is close to the intended installation
position of the inverter.
The radio signal level between the inverter and the Wi-Fi router
can be improved in different ways:
1. Change the direction of the antenna.
The antenna has a dead zone at its tip, which should not be
positioned facing the Wi-Fi router.
2. Find a new position for the router considering the different types
of materials which the radio signal will have to pass through
Material
Relative signal reduction
Open field
0% (strength of approximately 40 metres)
Wood / Glass
From 0 to 10%
Stone / Plywood
From 10 to 40%
Reinforced concrete
From 60 to 90%
Metal
Up to 100 %
3. Install a Wi-Fi signal repeater and place it in an area between
the inverter and the router, trying in this way to skip the most critical
obstacles.
5.2.7 Installations at high altitudes
Due to the rarefaction of the air (at high altitudes), particular
conditions may occur and it should be considered when choosing
the place of installation:
Less efficient cooling and therefore a greater likelihood of a
device power reduction (derating) occur due to high internal
temperatures.
Reduction in the dielectric resistance of the air which, in the
presence of high operating voltages (DC input), can create
electric arcs (electrical discharges) that may damage the device.
When the altitude increases, the failure rate of some electronic
components increases exponentially due to cosmic radiation.
NOTE –
D
All installations over 2000m (6561 ft) must be
valued taking in consideration the derating reported in the
curve (“3.7.3 Power derating due to altitude”).
ATTENTION –
A
Installation over 4000m (13123 ft) are not
allowed.
5.2.8 Installations with a high level of humidity
ATTENTION –
A
Never open the inverter in the case of rain,
snow or a level of humidity >95%.
ATTENTION –
A
Always carefully seal all unused openings.
Even though the device is equipped with an anti-condensation
valve, air with extremely high levels of humidity can lead to the
creation of condensation inside the inverter.
As the inverter is almost completely insulated from the outside,
condensation can also form after installation in certain weather
conditions.