Equipped with two independent MPPTs (Maximum Power Point Trackers), the inverter enables the separate management of two photovoltaic strings, making it particularly suitable for installations with different module orientations, tilt angles, or partial shading conditions. Its wide MPPT voltage range further enhances system design versatility and maximizes photovoltaic energy production under varying operating conditions.

The IP65 protection rating allows both indoor and outdoor installation, while the passive cooling system, utilizing a high-efficiency aluminum heat sink without primary cooling fans, ensures silent operation, long-term reliability, and reduced maintenance requirements throughout its service life.

Technical Specifications

DC Input

• Maximum DC Input Voltage (VDC max): 550 V
• MPPT Voltage Range (VDC MPP): 125 – 440 V DC
• Maximum DC Input Current (IDC max): 2 × 15 A
• Number of MPPT Trackers: 2 Independent MPPTs

AC Output

• Nominal AC Output Voltage (VAC nom): 230 V
• Nominal Grid Frequency: 50 / 60 Hz
• Nominal AC Output Power (PAC nom): 4000 W
• Nominal AC Output Current (IAC nom): 18 A
• Power Factor (cos φ): 1

General Specifications

• Model: SMA Sunny Boy SB 4000TL-20
• Manufacturer: SMA Solar Technology AG
• Inverter Type: Single-Phase On-Grid Transformerless Inverter
• Number of MPPT Trackers: 2 Independent MPPTs
• Protection Rating: IP65
• Cooling System: Passive Cooling via High-Efficiency Aluminum Heat Sink
• Installation: Indoor / Outdoor
• Approximate Weight: 25 kg
• Country of Manufacture: Germany

Key Features

• High-efficiency Transformerless technology
• Two independent MPPT trackers for optimized photovoltaic string management
• 4 kW nominal output power, ideal for residential and small commercial installations
• Wide MPPT voltage range for enhanced photovoltaic system design flexibility
• IP65 protection rating suitable for indoor and outdoor applications
• Highly reliable passive cooling system with aluminum heat sink
• Integrated display for monitoring operating parameters
• Premium German engineering by SMA Solar Technology AG
• Silent operation with reduced maintenance requirements
• Designed for continuous and reliable photovoltaic energy conversion

Ideal Applications

• Single-phase residential photovoltaic systems
• Small commercial photovoltaic installations
• Systems utilizing two independent photovoltaic strings
• Outdoor installations requiring IP65 environmental protection
• Replacement and retrofit of compatible SMA Sunny Boy series inverters
• Applications requiring high energy efficiency and outstanding operational reliability

Package Contents

• SMA Sunny Boy SB 4000TL-20 Photovoltaic Inverter (as shown in the photographs)

Product Condition

• New product
• Cosmetic condition as shown in the photographs
• Compatibility with the destination photovoltaic system should be verified before installation

Important Note

Before installation, please verify the compatibility of the SMA Sunny Boy SB 4000TL-20 with the electrical characteristics of the photovoltaic system, including the maximum DC input voltage (550 V), the MPPT operating range (125 – 440 V DC), and the applicable AC grid requirements. Installation and commissioning should be performed by qualified personnel in accordance with local electrical regulations and photovoltaic installation standards.

The SMA Sunny Boy SB 4000TL-20 combines 4 kW of nominal output power, Dual MPPT technology, Transformerless architecture, and SMA's renowned German engineering, delivering excellent efficiency, installation flexibility, and long-term reliability for modern grid-connected photovoltaic systems.