The ABB UNO-DM-6.0-TL-PLUS-B-QU is a high-performance single-phase photovoltaic inverter designed for residential and small commercial solar installations. Equipped with two independent MPPT trackers, it maximizes energy production even when solar strings are installed with different orientations or are subject to varying operating conditions.

Part of ABB's renowned UNO-DM series, this transformerless inverter combines high conversion efficiency, advanced monitoring capabilities, and integrated Wi-Fi connectivity for easy remote supervision and system management.

Manufactured by Power-One Italy S.p.A. and later marketed under the ABB / FIMER brand, the UNO-DM series is widely recognized for its reliability, compact design, and ease of installation.

⚙️ Technical Specifications

Identification Data

• Manufacturer: ABB
• Series: UNO-DM
• Model: UNO-DM-6.0-TL-PLUS-B-QU
• Part Number (P/N): 3P319900100A
• Inverter Type: Single-Phase Grid-Tied Photovoltaic Inverter
• Serial Number: 2043100005
• Work Order: 420000627741
• Country of Manufacture: Italy

AC Output

• Rated AC Power: 6000 W
• Maximum Apparent Power: 6650 VA
• Nominal AC Voltage: 230 V
• Grid Frequency: 50 / 60 Hz
• Maximum AC Current: 30 A
• Adjustable Power Factor: 0.1 to 1

DC Input

• Maximum DC Voltage: 600 VDC
• Operating DC Voltage Range: 90 – 580 VDC

MPPT Channel 1

• MPPT Voltage Range: 200 – 480 VDC
• Maximum Input Current: 20 A

MPPT Channel 2

• MPPT Voltage Range: 305 – 480 VDC
• Maximum Input Current: 11.5 A
• Maximum Short-Circuit Current (CH1 / CH2): 25 A

Additional Features

• Number of MPPT Trackers: 2 Independent MPPTs
• Integrated Wi-Fi Communication
• Protection Rating: IP65
• Protection Class: Class I
• Operating Temperature: -25°C to +60°C
• Transformerless Technology

🔧 Main Features

✔ 6 kW rated output power

✔ Dual independent MPPT trackers

✔ Integrated Wi-Fi for remote monitoring

✔ Suitable for indoor and outdoor installation (IP65)

✔ High-efficiency DC/AC conversion

✔ Compatible with residential and commercial PV systems

✔ Optimized for multi-orientation solar arrays

✔ Front status LED indicators

✔ Compact and lightweight design

✔ Reliable ABB / Power-One technology

🔌 Purpose and Operation

The ABB UNO-DM-6.0-TL-PLUS-B-QU converts DC energy generated by photovoltaic modules into grid-compatible AC power for residential and commercial applications.

Its dual MPPT architecture allows separate management of two independent solar strings, improving energy harvesting when modules are installed on different roof orientations or experience varying shading conditions.

The integrated Wi-Fi interface enables remote monitoring and performance analysis through compatible ABB/FIMER monitoring platforms.

☀️ Applications

Ideal for:

• Residential photovoltaic systems
• Private homes and villas
• Small commercial installations
• Rooftop solar systems
• Dual-string photovoltaic arrays
• Inverter replacement and retrofit projects
• Energy efficiency upgrades

⚠️ Common Faults and Symptoms

Grid Connection Faults

Symptoms:

❗ Grid connection failure

❗ Utility voltage errors

❗ Inverter remains disconnected from the grid

Possible causes:

• Grid voltage outside allowable limits
• Wiring issues
• Utility network instability

DC Input Faults

Symptoms:

❗ PV voltage alarms

❗ Reduced power production

❗ Startup failure

Possible causes:

• Incorrect string configuration
• Excessive PV voltage
• Damaged connectors or wiring

Communication Problems

Symptoms:

❗ Wi-Fi connection failure

❗ Monitoring unavailable

❗ Data transmission interruptions

Possible causes:

• Network configuration issues
• Firmware problems
• Communication hardware faults

Thermal Issues

Symptoms:

❗ Power derating

❗ Temperature alarms

❗ Automatic shutdown

Possible causes:

• Poor ventilation
• High ambient temperature
• Internal cooling issues

Internal Hardware Failures

Symptoms:

❗ Random restarts

❗ Fault messages

❗ Inverter shutdown

Possible causes:

• Aging capacitors
• Power supply failures
• Control board defects
• Surge damage

🚨 Possible Associated Errors

A malfunctioning inverter may display errors such as:

• Grid Fault
• No Grid
• Grid Voltage High
• Grid Voltage Low
• Grid Frequency Error
• Isolation Fault
• Ground Fault
• DC Input Error
• Overtemperature
• Internal Error
• Communication Error
• Wi-Fi Connection Error
• Power Stage Fault
• Hardware Fault

Actual error codes may vary depending on firmware version and regional grid settings.

📦 Package Contents

• 1 × ABB UNO-DM-6.0-TL-PLUS-B-QU Photovoltaic Inverter
• Product supplied as shown in the photographs

✅ Advantages

✔ Original ABB / Power-One inverter

✔ Dual independent MPPT technology

✔ Integrated Wi-Fi communication

✔ IP65 protection for outdoor installation

✔ High conversion efficiency

✔ Suitable for residential and commercial systems

✔ Easy monitoring and maintenance

✔ Reliable long-term operation

✔ Compact and lightweight design

🔄 Compatibility

Suitable for:

• Residential photovoltaic systems up to 6 kW
• Commercial solar installations
• Single-phase grid-connected PV systems
• New installations and retrofit projects

Always verify system design and electrical compatibility before installation.

🟢 Summary

The ABB UNO-DM-6.0-TL-PLUS-B-QU is a 6 kW single-phase photovoltaic inverter featuring dual independent MPPT trackers, integrated Wi-Fi communication, IP65 protection, and high-efficiency transformerless technology. Designed for residential and small commercial solar installations, it provides reliable energy conversion, advanced monitoring capabilities, and optimized performance for modern photovoltaic systems.