Fronius IG 4000 4000W Photovoltaic Inverter

The Fronius IG 4000 4000W Photovoltaic Inverter is no longer available from Infinigi.

Regrettably, we do not have any inventory left nor have access to this product as it is discontinued. Please note that we place this message on products that we have exhausted our options in obtaining. Contacting us will only reaffirm this message.

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Fronius IG 4000 4000W Photovoltaic Inverter

The powerful, reliable and light weight PV inverter series.

Higher yield due to work-sharing is achieved by linking the two power circuits using the MIX™ concept, our optimized master-slave system.  In the part-load range only one of the two power stage sets operates, while both work together at full-load. The advantages are noticeable, increase in yield with a simultaneous reduction in operating hours.  The Fronius IG 4000, IG 5100 and IG 4500LV inverters deliver more power output for higher performance (commercial)  installations, yet only weigh 42 lbs making them the lightest grid connected inverters resulting in installation cost savings.

Features of the Fronius IG 4000 4000W Photovoltaic Inverter:

  • Fronius LC-Display
  • HF-Transformer
  • Module-Manager
  • MIX-Concept


Now you can handle a lot more, thanks to the new Fronius IG 4000, IG 4500-LV (low voltage 208V) and IG 5100 grid tied inverters that output up to 5,100 Watts but still weigh only 42 pounds. The key is that these units use the same proven hardware and software as the 200,000 IG units already operating worldwide. It's like having two inverters in one easy-to-install box, but with the advantages of even greater part-load efficiency and increased longevity due to the new FRONIUS IGs' load-sharing ability.

You also get everything you would expect from the leader in inverter technology:

  • Lightweight: At 42 lbs, these FRONIUS IG inverters are the lightest grid-connected inverters making them easy-to-install.
  • More Energy: MIX Concept allows your system to output more energy under partload conditions.
  • Flexible: The wide voltage range of 150-500 V allows you to use different types of modules and system configuration possibilities.
  • Lower Cost: Integrated UL approved DC & AC disconnects which reduce installation time and complexity -often eliminating the need for additional disconnect.
  • LCD Display: User-friendly and comes standard with every FRONIUS IG; tracks more than 20 critical system performance parameters.
  • Plug-and-Play: Expansion slots in the inverter allow you to easily upgrade the inverter with a complete data communication solution.

Get a handle on the world's lightest, easiest-to-install inverters. Put our 60 years of design and manufacturing experience to work on your next job.


Also Known As:
IG 4000


Fronius IG 
IG 4000
IG 5100
IG 4500-LV
DC Input Data   
Recommend PV power 3000 - 5000 Wp 4000 - 6300 Wp 3600 - 5500 Wp
Max. DC input voltage 500 V 500 V 500 V
Operating DC voltage range150 - 450 V150 - 450 V 150 - 450 V
Max. usable DC input current    26.1 A  33.2 A   29.3 A 
AC Output Data  
Max. Output power @ 40°C 4000 W 5100 W    4500 W
Nominal AC output voltage 240 V  240 V 208 V
Utility AC voltage range 212 - 264 V (240 V + 10% / -12%) 183 - 229V
Maximum AC current 16.7 A 21.3 A  21.6 A 
Max. utility back feed current 0.0 A    0.0 A  0.0 A 
Operating frequency range 59.3 - 60.5 Hz (60 Hz nom) 
Total Harmonic Distortion THD <5%
Power Factor (cos phi) 1
General Data   
Max. Efficiency 95.2% 95.2% 94.4%
Consumption in stand-by < 0.15 W (night)   
Consumption during operation 15 W
Enclosure NEMA 3R
Size (l x w x h) 28.4 x 16.5 x 8.8 inches (720 x 418 x 223 mm)
Weight 42 lbs (19 kg)
Ambient Temperature Range
  -5 to 122  °F (-20 to +50 °C)  
Cooling controlled forced ventilation
Integrated AC and DC disconnects standard UL approved DC  & AC disconnects
Ground fault protection Internal GFDI, in accordance with UL 1741
DC reverse polarity Internal diode
Islanding protection Internal, in accordance with UL 1741, IEEE 1547
Over temperature Output power derating
Surge protection Internadl DC & AC protection to 6 kV
Safety UL 1741
EMI FCC Part 15; Class A & B
Anti-islandinig protection UL 1741, IEEE 1547
Ground fault detector and interruptor Compliant with NEC Art. 690 requirements, UL 1741
Max. AC over current protection Two-pole, 30 A circuit breaker
AC wire sizing Use maximum AWG 6 194  °F (90  °C) copper wire
DC wire sizing Use maximum AWG 8 194  °F (90  °C) copper wire
AC disconnect 32 A
DC disconnect 40 A
Warranty 10 year Premium Warranty is standard

Important note for the Fronius IG 4000 4000W Photovoltaic Inverter

Shipping Note: Due to the delicate/oversized nature of this product, our online shipping system is not able to accurately determine the cost for shipping. You may proceed with an online order and we will contact you prior shipping this item or please Contact Us and we will work to get you the exact shipping cost.
Note: Specifications and pricing of the Fronius IG 4000 4000W Photovoltaic Inverter subject to change without notice. Illustrations and descriptions of the Fronius IG-4000 do not claim to be complete or exhaustive.

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