110 kW grid-connected inverter model AU110K3P

Entering the field of commercial and utility-scale power generation requires equipment with the highest levels of stability, intelligence, and efficiency. At this scale, even a 0.1% drop in efficiency can translate into massive financial losses over a project’s 25-year lifespan. This is where choosing a powerful central (string) inverter becomes not just an option, but a strategic requirement.

Today, we are taking a closer look at one of the heavyweights of the solar energy industry: the Austa AU110K3P three-phase, grid-tied 110kW inverter. This device, part of the flagship series produced by NINGBO AUSTA SOLAR TECH, is engineered for large solar farms, massive industrial rooftops, and projects where every watt of energy matters.

This article provides a comprehensive technical analysis of the AU110K3P inverter and highlights why this model—with its 10 independent MPPT trackers and an impressive 98.7% efficiency—can serve as the central brain of your solar power plant.

AU110K3P 110kW Inverter: Beyond a Simple Power Converter

The AU80-125K3P series are all three-phase, grid-tied (On-Grid) inverters. Their primary function is to convert the DC electricity produced by thousands of solar panels into 400V three-phase AC electricity and feed it into the national grid.

The advanced transformerless design of this series offers major advantages. By eliminating the heavy and bulky transformer, these inverters achieve much higher efficiency (since transformer core losses are removed), significantly lower weight (89 kg is remarkable for a 110kW inverter), and simpler installation and maintenance.

Key Advantages of AU110K3P: Why It Is Ideal for Large-Scale Projects

High output power alone is not enough. The superiority of AU110K3P lies in its advanced engineering and technical depth.

1. Engineering Masterpiece: 10 Independent MPPT Trackers

This is the most important competitive advantage of the AU110K3P. It is equipped with 10 Maximum Power Point Tracking (MPPT) units.

Why are 10 MPPTs crucial?
In large solar farms or industrial rooftops, it is nearly impossible for all panels to have identical conditions. Challenges may include:

• Multi-directional rooftops (east, west, south).
• Shading from chimneys, towers, or neighboring buildings at different times of the day.
• Mixed panel models or panels with different ages.
• Uneven dust accumulation across different sections.

An inverter with 1 or 2 MPPTs will reduce the performance of the entire string if even one panel is shaded. But with 10 independent MPPTs, the AU110K3P can manage 10 panel arrays (each with 2 string inputs) completely separately. This means shading or issues in one section will not affect the others, maximizing total energy yield.

2. Utility-Grade Efficiency: 98.7% Maximum Efficiency

In megawatt-scale projects, every 0.1% efficiency equals tens of millions of tomans annually. The AU110K3P offers:

• Maximum efficiency: 98.7%
• European efficiency: 98.1%

These values place the inverter in the world-class category. The 98.1% European efficiency shows how well the inverter performs under real-world operating conditions—not just peak sunlight—ensuring minimal energy loss.

3. Massive DC Input Capacity (DC Oversizing)

The AU110K3P has a nominal output of 110 kW, but it can accept up to 165 kW of solar panels as DC input.

Why is this beneficial?
This capability, known as DC Oversizing, allows designers to install up to 1.5 times the inverter’s capacity in panels. Because panels rarely reach their nominal power (due to heat, clouds, angle of radiation), installing 165 kW of panels allows the inverter to operate at full 110 kW output during mornings, evenings, and partly cloudy days. This “widens the production curve” and significantly increases annual revenue.

4. Built for Harsh Conditions (IP66)

Utility-scale inverters must withstand deserts, industrial zones, and outdoor environments. With IP66 protection, the AU110K3P is fully dust-tight and resistant to high-pressure water jets. The intelligent forced-air cooling system and operating temperature range from -25°C to +60°C ensure stable performance during the hottest summer days and the coldest winter nights.

“In large-scale solar projects, CAPEX is only part of the equation. True ROI is determined by OPEX and annual energy production. Inverters like the AU110K3P—with 10 MPPTs and high efficiency—directly increase production and reduce maintenance requirements, making them the top choice for project engineers.”

Technical Specifications of the Austa AU110K3P Inverter

The following table presents the precise technical specifications of this model based on the product data sheet:

Grid Stability and Complete Safety (Grid Friendly)

Large inverters are key contributors to grid stability. With globally recognized certifications, the AU110K3P supports advanced grid-friendly features:

• Active & passive anti-islanding protection: Ensures complete shutdown during grid outages for operator safety.
• Active power control (0–100%): Allows production curtailment based on grid dispatch commands.
• Power factor adjustment: Adjustable PF from 0.8 leading to 0.8 lagging to help stabilize grid voltage.
• Comprehensive protections: Including reverse polarity, short circuit, overvoltage, overcurrent, and insulation resistance monitoring.

Frequently Asked Questions

1. Which types of projects is the 110kW inverter suitable for?

The AU110K3P inverter is designed for large commercial and utility-scale projects. This includes solar farms, large factory rooftops, and industrial complexes requiring high output power and intelligent energy management.

2. What is the main benefit of having 10 MPPT trackers?

Having 10 independent MPPTs means the inverter can manage 10 separate panel arrays (for example, with different orientations or shading conditions). This eliminates mismatch losses and maximizes total system production.

3. Is this inverter suitable for harsh climate conditions in Iran?

Yes. With IP66 protection (fully resistant to dust and water) and an advanced intelligent cooling system, it is designed to operate continuously in the harshest environments, from hot deserts to heavily polluted industrial zones.

4. What does “DC oversizing” mean in this model?

This 110kW inverter can accept up to 165kW of solar panels on the DC side. This allows the inverter to operate at full output for more hours of the day (early morning, late afternoon, cloudy weather), significantly increasing annual energy production.