Description

SMA Sunny Boy SB4000TL-21 – 4kW Dual MPPT Solar Inverter

The SMA Sunny Boy SB4000TL-21 is a high-quality 4kW single-phase solar PV inverter designed for reliable residential and small commercial installations. Featuring dual MPPT trackers, this inverter allows two independent string inputs, improving system flexibility and optimising energy yield across varying roof orientations.

SMA inverters are widely regarded as industry-leading for durability, efficiency and long-term performance.

Key Features

• Rated Output Power: 4kW (4000W)

• Dual MPPT trackers (2 independent strings)

• Single-phase grid-tied operation

• Proven SMA reliability and build quality

• Suitable for residential solar PV systems

Condition

• Removed from a fully functioning system

• Fully tested and workshop inspected

• Cosmetic scratches present (see images)

• Wall bracket not included

Warranty

• 3-month warranty included

• Technical support available by phone or email

Why Buy From Us?

• VAT invoice supplied with every purchase

• Registered UK company

• All equipment tested using specialist workshop equipment

• Renewable recycling specialists supporting sustainable reuse

• Friendly technical support available