Wholesale Solar Logo
You're logged in as a dealer. Where applicable, special dealer pricing is shown with a purple "Add to Quote" button instead of the blue "Add to Cart" button.

Discontinued Product

Wholesale Solar no longer offers the Fronius Fronius IG 5100 Inverter, 5100W Inverter

The following item(s) may be suitable for replacement:

Or See our other Inverters

Please call to verify compatibility.

Fronius Fronius IG 5100 Inverter, 5100W Inverter

  • Inverters and data communication solutions for grid-connected PV systems

Product Information

Model Part No. Watts Input
Type Price
Fronius Fronius IG 5100 Inverter, 5100W Inverter29510025000W240VDC$2,775.00


Fronius builds products that can withstand the test of time. The IG-5100 will hold up in harsh environments and withstand heavy usage. The IG-5100 watt inverter weighs only 42 pounds, the lightest grid-intertied inverter on the market.

***Help eliminate the threat of pollution***

Because Fronius uses fewer raw materials in building each IG inverter, they produce few CO2 emissions and less material that will eventually need to be recycled or disposed of.

Its light weight also means it costs two to three times less to ship it to you. Less fossil fuels are consumed to get the Fronius IG from our warehouse to your photovoltaic installation.

Back to Top

Features & Attributes

  • MPPT accuracy of 99.9%- Regardless of which PV modules you use; crystalline, poly or thin film.
  • The Fronius IG Module ManagerTM software attaches itself to the array’s maximum power point to optimize its energy output.
  • Active Cooling- The inverters operate reliably at full power, without de-rating.
  • Phase Shift Technology- Unique phase-shift design maximizes switching efficiency. Switching losses are minimized through this innovative technology, allowing an even higher efficiency to be maintained.
  • Fully programmable operation
  • The Fronius IG uses a high frequency transformer. It is substantially smaller than the 60 Hz transformers used in inverters with one-stage topologies. The transformer also provides galvanic isolation. Since transformers are largely made of copper and iron, that's a lot of raw metal that is no longer necessary.
  • We have optimized the output inductor to put two inductors on one coil. Many other inverters use 2 separate inductors, which will produce a heavier inverter.
  • A wide input voltage range permits the use of modules of every power size and voltage. You can easily fine tune your system with different wattage modules and string configurations.
  • Both DC and AC electrical connections are made in the convenient installer accessible wiring compartment. Every FRONIUS IG comes standard with integrated DC and AC disconnects.We’ve pre-wired the DC breaker to a heavy-duty terminal block that accepts up to eight #8 AWG conductors.
Back to Top


Fronius Fronius IG 5100 Inverter, 5100W Inverter

Product Manual
Spec. Sheet
Back to Top

Additional Image

About Fronius

Key Points

  • Extensive product line, accommodating a wide range of applications.
  • A trusted name in the renewable energy field.
  • High frequency/phase shift architecture maximizes efficiency while reducing weight.

Headquartered in Pettenbach, Austria, Fronius has been a key manufacturer of photovoltaic electronics since 1992, particularly in the engineering and manufacturing of photovoltaic inverters for both grid-connected and independent power supplies. Fronius was founded in 1945, and began manufacturing battery-charging systems shortly thereafter. They made a name for themselves with premium welding technology, especially in the automotive industry. Eventually, technology and engineering standards used in welding applications transferred over to the solar electronics market.

Production facilities have always remained close to home, nestled at the foot of the Alps, in Sattledt, and Weis in northwestern Austria, along with production sites in the Czech Republic and Ukraine. A state-of-the-art facility opened early 2011 in Pettenbach, reaffirming the company's commitment to the European union. Fronius has remained a trusted name in the renewable energy market, offering an extensive line of photovoltaic electronics, built to high quality control standards.

Fronius' IG series of inverters offer residential & commercial grid-tie customers a wide range of products, which reflect the company's proven designs. Their wide input voltage range allows for flexible use of modules in any power and voltage range. These inverters come standard with 3 expansion slots, which allow you to add features like external sensors and remote displays. High-frequency (HF) architecture, and phase shift technology deliver higher reliability and efficiency while reducing size, weight, and installation costs. All Fronius IG series inverters are CSA listed to UL 1741 for the U.S and Canada, and are backed up by standard 10-year warranty with the option for a 5-year extension.

The Fronius IG plus line offers customers more features for larger systems. These inverters provide a lockable, code-compliant DC disconnect with a six circuit, fused string combiner in a separable compartment that stays on the wall if the inverter needs to be serviced. A bus bar is available for bypassing the combiner on higher input currents, and the string combiner can be fused for up to 20 amps per circuit. Fronius IG inverters make a seemingly complex system appear simple and straightforward, maximizing ease-of-use and technological advancement.

Back to Top

Solar questions? Website problems? Please contact us.