Fronius Primo 4kW



Fronius has wireless logging and a programmable relay built in. The relay can be used to switch excess production to items such as electric hot water systems and is far more accurate than a traditional timer-relay combination.

Fronius also have a 10 year warranty as an on-going special offer, and have built a name that people can trust over many years of service in Australia. These inverters are also suitable for zero export (when combined with Fronius’ energy meter) and like SMA, are one of the most ‘battery ready’ inverters on the market.

Max. input current (Idc max 1 / Idc max 2) 12.0 A / 12.0 A
Max. array short circuit current (MPP1/MPP2) 18.0 A / 18.0 A
Min. input voltage (Udc min) 80 V
Feed-in start voltage (Udc start) 80 V
Nominal input voltage (Udc,r) 700 V
Max. input voltage (Udc max) 1,000 V
Usable MPP voltage range (Umpp min – Umpp max) 80 V – 800 V
MPP voltage range at nominal power (Umpp min – Umpp max) 210 – 800 V
Number of MPP trackers 2
Number of DC connections 2 + 2

AC nominal output (Pac,r) 4,000 W
Max. output power 4,000 VA
AC output current (Iac nom) 17.4 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 φac,r) 0.85 – 1 ind. / cap.

Dimensions (height x width x depth) 645 x 431 x 204 mm
Weight 21.5 kg
Degree of protection IP 65
Protection class 1
Overvoltage category (DC / AC) 2) 2 / 3
Night time consumption < 1 W
Inverter design Transformerless
Cooling Regulated air cooling
Installation Indoor and outdoor installation
Ambient temperature range -40 – +55 °C
Permitted humidity 0 – 100 %
Max. altitude 4,000 m
DC connection technology 2x DC+1, 2x DC+2 and 4x DC- screw terminals 2.5 – 16 mm²
Mains connection technology 3-pole AC screw terminals 2.5 – 16 mm²
Certificates and compliance with standards DIN V VDE 0126-1-1/A1, IEC 62109-1/-2, IEC 62116, IEC 61727, AS 3100, AS 4777-2, AS 4777-3, G83/2, G59/3, CEI 0-21

Max. efficiency 97.7 %
MPP adaptation efficiency > 99.9 %

DC insulation measurement Yes
Overload behaviour Operating point shift. power limitation
DC disconnector Yes

WLAN / Ethernet LAN Fronius Solar.web, Modbus TCP SunSpec, Fronius Solar API (JSON)
6 inputs and 4 digital in/out Interface 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 Webserver Included
External input 1) S0-Meter Interface / Input for overvoltage protection
RS485 Modbus RTU SunSpec or meter connection


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