Othonos 39, 17343
Agios Dimitrios Athens
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Central Inverters (12-250 kW)

Central Inverters (12-250 kW)

Inverters (On-Grid Inverter)

Sirio Central inverters allow direct connection to the low voltage grid ensuring the galvanic separation compared to direct current installations.
The generous rating of the transformer and the other inverter components provides a return of the highest among the units of the same category.


Technical Specifications

Product Brochure

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.


  • 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

Rated AC power 12KVA15KVA18KVA25KVA33KVA40KVA64KVA80KVA100KVA200KVA25 KVA33 KVA40 KVA64 KVA80KVA
Maximum AC power12kW (cosφ=1)15kW (cosφ=1)18KW (cosφ=1)25KW (cosφ=1)33KW (cosφ=1)40KW (cosφ=1)64KW (cosφ=1)80KW (cosφ=1)100KW (cosφ=1)200KW (cosφ=1)25KW (cosφ=1)33KW (cosφ=1)40KW (cosφ=1)64KW (cosφ=1)80KW (cosφ=1)


Maximum DC voltage in an open circuit800Vcc800Vcc880V DC
MPPT at full rating range330÷700V DC330÷700Vcc450÷760V DC
Operating interval330÷700V DC330÷700Vcc450÷760V DC
Maximum input current36A DC54A DC63A DC80A DC105A DC130A DC205A DC260A DC320A DC650A DC59A DC79A DC98A DC157A DC196A DC
Threshold voltage for grid supply390V DC390V DC540V DC
Ripple voltage<1%<1%<1%
Input number111
MPPT number111
DC connectorsScrew terminalsScrew terminalsBus barScrew terminalsBus bar


Operating voltage400V AC400V AC400V AC
Operating range340÷460V AC (1)340÷460V AC (1)340÷460V AC (1)
Maximum power range340÷460V AC (1)340÷460V AC340÷460V AC
Frequency range47,5÷51,5Hz (1)47,5÷51,5Hz(1)47,5÷51,5Hz(1)
Frequency range set up47÷53Hz47÷53Hz47÷53Hz
Rated current17,3A AC21,7A AC26A AC36A AC48A AC58A AC92A AC115A AC145A AC289A AC36A AC48A AC58A AC92A AC115A AC
Maximum current22,4A AC28,1A AC33A AC46A AC60A AC73A AC117A AC146A AC182A AC364A AC46A AC60A AC73A AC117A AC146A AC
Short cirtuit current contribution34A AC42A AC50A AC68A AC90A AC110A AC175A AC219A AC274A AC546A AC68A AC90A AC110A AC175A AC219A AC
Total Harmonic Distorsion (THDi)<3%<3%<3%<3%<3%<3%<3%
Power factorfrom 0,9 ind. to 0,9 cap.(1)from 0,9 ind. to 0,9 cap.(1)from 0,9 ind.to 0,9 cap.(1)
Galvanic separationTrafo BFTrafo BFTrafo BF
AC connectorsScrew terminalsScrew terminalsBus barScrew terminalsBus bar


Maximum efficiency95,80%95,80%96,10%96,20%96,40%96,30%96,20%96,10%
European efficiency94,80%94,90%95%95,10%95,20%95,30%94,90%95,00%
Stand-by consumption<32W<32W<32W
Overnight consumption<32W<32W<32W
Built-in protectionsAutomatic circuit breaker AC side – Switch-disconnectors DC sideAutomatic circuit breaker AC side – Switch-disconnectors DC sideAutomatic circuit breaker AC side – Switch-disconnectors DC side
Protection durring stand-by operations YesYesYes
Hearth leakage detectionYesYesYes
Heat dissipationControlled fansControlled fansControlled fans
Operating temperature-20°C÷45°C (nο derating)-20°C÷45°C (nο derating)-20°C÷45°C (nο derating)
Storage temperature-20°C÷70°C-20°C÷70°C-20°C÷70°C
Humidity5÷95% non-condensing5÷95% non-condensing5÷95% non-condensing
Weight310 Kg320 Kg340 Kg350 Kg380 Kg420 Kg600 Kg650 Kg720 Kg1580 Kg350 Kg380 Kg420 Kg600Kg650 Kg


EMCEN61000-6-3, EN61000-6-2, EN61000-3-11, EN61000-3-12EN61000-6-3, EN61000-6-2, EN61000-3-11, EN61000-3-12EN61000-6-3, EN61000-6-2, EN61000-3-11, EN61000-3-12
SafetyEN62109-1, EN62109-2EN62109-1, EN62109-2EN62109-1, EN62109-2
DirectivesLow Voltage Directive: 2006/95/EC, EMC Directive: 2004/108/ECLow Voltage Directive: 2006/95/EC, EMC Directive: 2004/108/ECLow Voltage Directive: 2006/95/EC, EMC Directive: 2004/108/EC
Grid managementCEI 0-21, CEI 0-16, A70, VDE 0126-1-1, G59/2, Real Decreto 413/2014, PO12.3CEI 0-21, CEI 0-16, A70, VDE 0126-1-1, G59/2, Real Decreto 413/2014, PO12.3CEI 0-16, A70, Real Decreto 413/2014, PO12.3CEI 0-21, CEI 0-16, A70, VDE 0126-1-1, G59/2, Real Decreto 413/2014, PO12.3
(1) These values can vary depending on the local regulations.              


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