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Fronius Primo: The Communicative Inverter for Optimised Energy Management

An overview of the Fronius Primo series, designed for private households.

Key Features

The Fronius Primo series offers power categories from 3.0 to 8.2 kW, completing the SnapINverter generation. This single-phase, transformerless device is ideal for private households. Its innovative SuperFlex Design ensures maximum flexibility in system design, and the SnapInverter mounting system simplifies installation and maintenance. The standard communication package includes WLAN, energy management, and multiple interfaces, making the Fronius Primo a communicative inverter for homeowners.

Technical Data: Fronius Primo (3.0-1, 3.5-1, 3.6-1, 4.0-1, 4.6-1)

Input Data

INPUT DATAPRIMO 3.0-1PRIMO 3.5-1PRIMO 3.6-1PRIMO 4.0-1PRIMO 4.6-1
Number of MPP trackers22222
Max. input current (Idc max 1 / Idc max 2)12.0 A / 12.0 A12.0 A / 12.0 A12.0 A / 12.0 A12.0 A / 12.0 A12.0 A / 12.0 A
Max. array short circuit current (MPP1/MPP2)18.0 A / 18.0 A18.0 A / 18.0 A18.0 A / 18.0 A18.0 A / 18.0 A18.0 A / 18.0 A
DC input voltage range (Udc min - Udc max)80-1000 V80-1000 V80-1000 V80-1000 V80-1000 V
Feed-in start voltage (Udc start)80 V80 V80 V80 V80 V
Usable MPP voltage range80-800 V80-800 V80-800 V80-800 V80-800 V
Number of DC connections2+22+22+22+22+2
Max. PV generator output (Pdc max)4.5 kWpeak5.3 kWpeak5.5 kWpeak6.0 kWpeak6.9 kWpeak

Output Data

OUTPUT DATAPRIMO 3.0-1PRIMO 3.5-1PRIMO 3.6-1PRIMO 4.0-1PRIMO 4.6-1
AC nominal output (Pac,r)3,000 W3,500 W3,680 W4,000 W4,600 W
Max. output power / rated apparent power3,000 VA3,500 VA3,680 VA4,000 VA4,600 VA
AC output current (lac nom)13.0 A15.2 A16.0 A17.4 A20.0 A
Grid connection (voltage range)1~NPE 220 V / 230 V (180 V - 270 V)
Frequency (frequency range)50 Hz / 60 Hz (45 - 65 Hz)
Total harmonic distortion<5%
Power factor (cos ac,r)0.85 - 1 ind. / cap.

General Data

GENERAL DATAPRIMO 3.0-1PRIMO 3.5-1PRIMO 3.6-1PRIMO 4.0-1PRIMO 4.6-1
Dimensions (height x width x depth)645 x 431 x 204 mm
Weight21.5 kg
Degree of protectionIP 65
Protection class1
Overvoltage category (DC / AC) 1)2 / 3
Night time consumption< 1 W
Inverter designTransformerless
CoolingRegulated air cooling
InstallationIndoor and outdoor installation
Ambient temperature range-40 - +55 °C
Permitted humidity0 - 100 %
Max. altitude4,000 m
DC connection technology4x DC+ and 4x DC- screw terminals 2.5 - 16 mm²
AC connection technology3-pole AC screw terminals 2.5 - 16 mm²
Certificates and compliance with standardsDIN V VDE 0126-1-1/A1, IEC 62109-1/-2, IEC 62116, IEC 61727, AS 4777-2, AS 4777-3, G83/2, G59/3, CEI 0-21, VDE AR N 4105
Country of manufactureAustria

Efficiency

EFFICIENCYPRIMO 3.0-1PRIMO 3.5-1PRIMO 3.6-1PRIMO 4.0-1PRIMO 4.6-1
Max. efficiency98.0 %98.0 %98.0 %98.1 %98.1 %
European efficiency (nEU)96.1 %96.8 %96.8 %97.0 %97.0 %
MPP adaptation efficiency> 99.9 %

Protective Devices

PROTECTIVE DEVICESPRIMO 3.0-1PRIMO 3.5-1PRIMO 3.6-1PRIMO 4.0-1PRIMO 4.6-1
DC insulation measurementYesYesYesYesYes
Overload behaviourOperating point shift. Power limitation
DC disconnectorYesYesYesYesYes
Reverse polarity protectionYesYesYesYesYes
RCMUYesYesYesYesYes

Interfaces

INTERFACESPRIMO 3.0-1PRIMO 3.5-1PRIMO 3.6-1PRIMO 4.0-1PRIMO 4.6-1
WLAN / Ethernet LANFronius Solar.web, Modbus TCP SunSpec, Fronius Solar API (JSON)
6 inputs and 4 digital in/outInterface to ripple control receiver
USB (A socket) 2)Datalogging, inverter update via USB flash drive
2x RS422 (RJ45 socket) 2)Fronius Solar Net
Signalling output 2)Energy management (potential-free relay output)
Datalogger and WebserverIncluded
External input 2)S0-Meter Interface / Input for overvoltage protection
RS485Modbus RTU SunSpec or meter connection

Technical Data: Fronius Primo (5.0-1, 5.0-1 AUS, 6.0-1, 8.2-1)

Efficiency Curves and Derating

The document includes graphical representations of performance:

Input Data

INPUT DATAPRIMO 5.0-1PRIMO 5.0-1 AUSPRIMO 6.0-1PRIMO 8.2-1
Number of MPP trackers2222
Max. input current (Idc max 1 / Idc max 2)12.0 A / 12.0 A12.0 A / 12.0 A18.0 A / 18.0 A18.0 A / 18.0 A
Max. array short circuit current (MPP1/MPP2)18.0 A / 18.0 A18.0 A / 18.0 A27.0 A / 27.0 A27.0 A / 27.0 A
DC input voltage range (Udc min - Udc max)80-1,000 V80-1,000 V80-1,000 V80-1,000 V
Feed-in start voltage (Udc start)80 V80 V80 V80 V
Usable MPP voltage range80-800 V80-800 V80-800 V80-800 V
Number of DC connections2+22+22+22+2
Max. PV generator output (Pdc max)7.5 kWpeak7.5 kWpeak9.0 kWpeak12.3 kWpeak

Output Data

OUTPUT DATAPRIMO 5.0-1PRIMO 5.0-1 AUSPRIMO 6.0-1PRIMO 8.2-1
AC nominal output (Pac,r)5,000 W4,600 W6,000 W8,200 W
Max. output power / rated apparent power5,000 VA5,000 VA / 4,600 VA6,000 VA8,200 VA
AC output current (lac nom)21.7 A21.7 A26.1 A35.7 A
Grid connection (voltage range)1~NPE 220 V / 230 V (180 V - 270 V)
Frequency (frequency range)50 Hz / 60 Hz (45 - 65 Hz)
Total harmonic distortion<5%
Power factor (cos ac,r)0.85 - 1 ind. / cap.

General Data

GENERAL DATAPRIMO 5.0-1PRIMO 5.0-1 AUSPRIMO 6.0-1PRIMO 8.2-1
Dimensions (height x width x depth)645 x 431 x 204 mm
Weight21.5 kg
Degree of protectionIP 65
Protection class1
Overvoltage category (DC / AC) 1)2 / 3
Night time consumption< 1 W
Inverter designTransformerless
CoolingRegulated air cooling
InstallationIndoor and outdoor installation
Ambient temperature range-40 - +55 °C
Permitted humidity0 - 100 %
Max. altitude4,000 m
DC connection technology4x DC+ and 4x DC- screw terminals 2.5 - 16 mm²
AC connection technology3-pole AC screw terminals 2.5 - 16 mm²
Certificates and compliance with standardsDIN V VDE 0126-1-1/A1, IEC 62109-1/-2, IEC 62116, IEC 61727, AS 4777-2, AS 4777-3, G83/2, G59/3, CEI 0-21, VDE AR N 4105 2)
Country of manufactureAustria

Efficiency

EFFICIENCYPRIMO 5.0-1PRIMO 5.0-1 AUSPRIMO 6.0-1PRIMO 8.2-1
Max. efficiency98.1 %98.1 %98.1 %98.1 %
European efficiency (nEU)97.1 %97.1 %97.3 %97.5 %
MPP adaptation efficiency> 99.9 %

Protective Devices

PROTECTIVE DEVICESPRIMO 5.0-1PRIMO 5.0-1 AUSPRIMO 6.0-1PRIMO 8.2-1
DC insulation measurementYesYesYesYes
Overload behaviourOperating point shift. power limitation
DC disconnectorYesYesYesYes
Reverse polarity protectionYesYesYesYes
RCMUYesYesYesYes

Interfaces

INTERFACESPRIMO 5.0-1PRIMO 5.0-1 AUSPRIMO 6.0-1PRIMO 8.2-1
WLAN / Ethernet LANFronius Solar.web, Modbus TCP SunSpec, Fronius Solar API (JSON)
6 inputs and 4 digital in/outInterface to ripple control receiver
USB (A socket) 1)Datalogging, inverter update via USB flash drive
2x RS422 (RJ45 socket) 1)Fronius Solar Net
Signalling output 1)Energy management (potential-free relay output)
Datalogger and WebserverIncluded
External input 1)S0-Meter Interface / Input for overvoltage protection
RS485Modbus RTU SunSpec or meter connection

About Fronius

Fronius, established in 1945, is a leader in welding technology, photovoltaics, and battery charging. With approximately 5,660 employees worldwide and 1,321 patents, the company demonstrates a strong spirit of innovation. Fronius is committed to sustainable development, balancing environmental and social aspects with economic factors, aiming to remain an innovation leader.

Further information about Fronius products and global sales partners can be found at www.fronius.com.

Contact Information

Fronius India Private Limited
Plot no BG-71/2/B, Pimpri Industrial Area, MIDC- Bhosari, Pune- 411026, India
pv-sales-india@fronius.com
www.fronius.in

Fronius Australia Pty Ltd.
90-92 Lambeck Drive, Tullamarine VIC 3043, Australia
pv-sales-australia@fronius.com
www.fronius.com.au

Fronius UK Limited
Maidstone Road, Kingston, Milton Keynes, MK10 0BD, United Kingdom
pv-sales-uk@fronius.com
www.fronius.co.uk

Fronius International GmbH
Froniusplatz 1, 4600 Wels, Austria
pv-sales@fronius.com
www.fronius.com

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