AUXSOL ASN-110TL-PLUS: 110 kW Commercial String Inverter

AUXSOL ASN-110TL-PLUS, Overview

The AUXSOL ASN-110TL-PLUS is a 110 kW three-phase transformerless string inverter from Ningbo AUXSOL Technology, targeting commercial rooftop and ground-mount solar installations in the 300 kWp to 2 MWp range. The PLUS designation marks the second-generation ASN series with enhanced MPPT granularity (12 independent MPPT inputs versus 8 in the original ASN-100TL) and reactive power compensation capability, which has become a grid operator requirement in several European markets.

At 110 kW, this is a mid-range commercial inverter, above the residential/small commercial segment (3-30 kW) and below the utility-scale central inverter segment (500 kW+). Multiple units are typically deployed in parallel across large commercial rooftop arrays, connected to a central monitoring platform via Modbus RTU or Ethernet.

12 MPPT Inputs, Why Granularity Matters at Commercial Scale

Commercial rooftops rarely have uniform orientation. Roof sections face south, southeast, and east. Shadows from HVAC equipment, vent stacks, and neighboring structures fall on different parts of the array at different times of day. With 8 MPPT inputs, some mismatch between string orientations ends up on the same MPPT tracker, power loss from one string drags down others sharing the same tracker.

The PLUS adds 4 MPPT inputs (12 total) with 24 string connections. For a 330 kWp installation across 3 roof sections with 4 orientations, each orientation gets its own dedicated MPPT range. Energy yield improvement compared to 8-MPPT configurations is 2-5% annually for arrays with significant orientation variation, according to AUXSOL's site analysis modeling. Third-party validation of this claim has not been independently published.

98.8% Peak Efficiency

The ASN-110TL-PLUS reaches 98.8% peak efficiency at 50-60% load, which is where most grid-tied commercial arrays operate during peak production hours. Euro efficiency (weighted average across European irradiance distribution) is 98.2%.

Competing 100-110 kW string inverters from Sungrow (SG110CX-P2) and Huawei (SUN2000-100KTL-M1) achieve similar efficiency figures within 0.2 percentage points. At this power class, efficiency is not a primary differentiator, installation cost, warranty support, and MPPT configuration are more relevant selection criteria.

The fanless natural convection cooling is worth noting. Fan failure is a leading cause of inverter downtime in the 5-15 year operational window. Natural convection extends mean time between failures and eliminates fan maintenance costs. The trade-off is a larger enclosure, the ASN-110TL-PLUS is 1030 x 720 x 380 mm and 118 kg, requiring wall mounting or floor bracket installation.

Reactive Power Compensation

The ASN-110TL-PLUS supports reactive power output from 0.8 leading to 0.8 lagging power factor, configurable via the monitoring interface. This meets the reactive power requirements of German, Italian, and Dutch grid codes that mandate dynamic reactive power support from inverters connected at medium voltage. For installations requiring grid code compliance in these markets, reactive power capability is not optional, it's required for grid approval.

Without reactive power compensation, commercial arrays above 100 kW in these markets require external reactive power compensation equipment, adding EUR 8,000-20,000 to installation cost depending on system size. The ASN-110TL-PLUS eliminates this cost for qualifying systems.

Monitoring and Communication

Standard communication is RS485 (Modbus RTU) and Ethernet. AUXSOL's cloud monitoring platform (AUXSOL Cloud) handles up to 100 devices per account and provides real-time production data, energy yield analysis, alarm management, and string-level performance comparison.

For installations requiring third-party SCADA integration, Modbus RTU is the most widely supported protocol. Sunspec Alliance compliance documentation for the ASN-110TL-PLUS is available from AUXSOL on request; confirm Sunspec certification status with your SCADA vendor before specifying this inverter in a multi-vendor installation.

Optional 4G/GPRS communication module is available for remote sites without Ethernet infrastructure.

How It Compares

Spec	AUXSOL ASN-110TL-PLUS	Sungrow SG110CX-P2	Huawei SUN2000-100KTL-M1
Rated Power	110 kW	110 kW	100 kW
Peak Efficiency	98.8%	98.9%	98.8%
MPPT Inputs	12	12	10
Max DC Voltage	1100 V	1100 V	1100 V
Reactive Power	Yes (0.8 pf)	Yes (0.8 pf)	Yes (0.8 pf)
Cooling	Fanless	Fan-cooled	Fan-cooled
IP Rating	IP66	IP66	IP65
Warranty	10 years	10 years	10 years
Approx. price (USD)	~$8,500	~$9,200	~$10,500

Sungrow and Huawei dominate commercial string inverter installations in Europe and Asia, primarily because their service networks are well-established and project finance lenders recognize them. AUXSOL's ASN-110TL-PLUS is 8-20% cheaper at comparable specifications, which is meaningful on large commercial installations where 10 inverters are specified together.

The risk consideration: AUXSOL's commercial service network is thinner than Sungrow's or Huawei's. For projects with strict uptime requirements and O&M contracts, verify AUXSOL's local service coverage before specifying. For owner-occupied commercial rooftops where in-house maintenance handles inverter issues, the cost saving is straightforward.

Sizing Context

A single ASN-110TL-PLUS powers approximately 280-330 solar panels at 400W each, covering 700-900 sq. m. of roof area. For a 1 MWp commercial installation, 9-10 units would be deployed in parallel across the array sections.

See our residential solar systems guide and power optimizer vs. microinverter comparison for system design context.

Rating based on 14 installer reviews.

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Related products: AUXSOL ASG-20TL-ZH Hybrid Inverter, Enphase IQ8A Microinverter