Main Features:

Maximum energy and safety

The Maximum Power Point Tracking (MPPT) research algorithm implemented in the control system of Sirio Central inverters allows full use of the photovoltaic generator in any radiation and temperature conditions, making the plant work constantly at maximum efficiency. In the absence of solar radiation the converter goes on standby and resumes normal operation when there is radiation again. This feature reduces self-consumption to a minimum and maximizes energy efficiency. The use of speed-controlled fans helps to optimize the overall efficiency of the inverter. Fan operation that is linked to the temperature also increases the expected lifespan and reduces costs incurred for extraordinary maintenance. All these design features, the careful choice of components and guaranteed quality of production according to ISO9001 standards make the three-phase inverters Sirio extremely efficient and reliable and guarantee maximum energy production.

Thermal derating

Derating as a function of temperature aimed to safeguard against overheating inverter semiconductors in the case of environments with temperatures exceeding installation specifications or for forced ventilation faults, without causing a complete block of the inverter itself. Sirio Central models ensure rated power output up to 45°C environment. If this threshold is exceeded, the inverter gradually decreases the power fed into the network in such a way as to maintain heat sink temperature within the maximum limit. Once back in the range of thermal normal operation, the inverter restores the optimal working point, again ensuring maximum power transfer.

Easy installation and maintenance

The footprint of these devices has been considerably reduced and there is no need to leave space at the side or back of the equipment since the electronics and power components are fully accessible from the front. Fully automatic operation ensures ease of use and facilitates installation and startup, thus avoiding installation and configuration errors which could lead to failures or reduced plant productivity.

Customized solutions

AROS is able on request to supply Sirio Central inverters specific to the client’s needs. Available options include the integrated isolation control and the pole/earth connection kit (positive or negative) that is required for some kinds of photovoltaic modules.

User Interface

Sirio Central inverters provide a series of new user interfaces composed of an LCD colour touch screen in a convenient 4.3” format. The millions of colours and quantity of features greatly enrich the user’s interaction experience with the solar inverter.

Intuitive icons and brief messages in the set language guide users through the simple menu structure, allowing them to access all reference, configuration and inverter control features. In particular, it is possible to view a daily energy production graph and the instantaneous value of power produced, verify module temperatures and the measurements of any installed analogue sensors.

The archive section allows viewing and analysis of historical data, crossing measurements as desired (no longer two sizes at a time). By scrolling a finger along the screen, users can query values recorded in previous days, including in monthly or annual intervals, and the graphs displayed can be sent via e-mail.

Internal storage allows for the archiving of about 5 years of data. However, if necessary, it is possible to delete older years by means of a special feature.

Historical data produced by the inverter and that of the system card can be saved on a USB flash drive.

The device also allows users to change the €/KWh ratio, adjust display brightness, change the system date and time, assign an identification and label to the plant it belongs to, configure and customise up to 4 external analogue sensors. It also allows e-mails to be sent (for which you can set the frequency) with production data and graphs and, in the case of abnormalities, any malfunction or ignition failure alarms.

Finally, via special counters in the Info section, users can consult data regarding total produced energy, the overall hours of operation, the economic return of the plan and other technical parameters, including the amount of memory used for historical data. The graphic interface is available in Italian, English, French, Spanish and German.

Network access

The touch screen device offers many communication possibilities if a connection to the local network exists.

The inverter is compatible both with PVSER proprietary protocol on the network and with ModBUS/TCP, thus offering easy insertion in any management BMS or data analysis using an Ethernet network.

The display software can be easily and quickly updated. Moreover, with a freeware software (VNC), users can remotely view the inverter screen or interact with it from their computer or mobile device.

Communication

• Display
• Colour LCD touch screen
• Communication interface
• Ethernet, USB, 2xRS232, inputs for remote controls

  (inverter trip and EPO) and 3

  operating status signal relays.

  RS485 optional (slot version)

• Protocol ModBUS and ModBUS/TCP