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Identification: MD-AL-GI-00
Rev. 1.1 of 15/03/2021 - Application: GID
User’s Manual 3PH 20000TL - 33000TL-V2
Rev. 1.1 15/03/2021
Inverter functions
A. Configurable relay
The inverter has a configurable switching relay that can be used in various operating conditions (set in the
menu). For example, it can close normally open contacts when an alarm occurs.
B. Energy management unit
B.1 Remote power on/off
This control can be used to activate/deactivate the inverter via an external (remote) control.
B.2 Feeding reactive power into the grid
The inverter is capable of generating reactive power and can then feed it into the grid by setting the Power
Factor. The feed-in management can be controlled directly by the network operator via a dedicated RS485
serial interface.
B.3 Limiting the active power fed into the grid
If properly set, the inverter can limit the amount of active power fed into the grid at the desired value
(expressed as a percentage). To achieve this limitation, it is necessary to use an external device (Anti-
Reverse Power Controller) not included with the inverter.
B.4 Automatic power reduction when grid is over frequency
When the grid frequency exceeds the limit set, the inverter reduces the power in order to ensure the
stability of the grid.
B.5 Power reduction due to environmental conditions, input and output voltage
The power reduction value and temperature of the inverter at which it occurs depends on the ambient
temperature and on many operating parameters, such as: input voltage, grid voltage and power available
from the photovoltaic field. The inverter can therefore reduce the power at certain times of the day and
depending on the value of these parameters.
C. Data transmission
The inverter (or a group of inverters) can be monitored remotely via an advanced communication system
based on a RS485 interface or via Wi-Fi.
D. Software update
A microSD card is used to update the firmware.
