SMA Sunny Tripower X 20-US-50 20kW Three-Phase Inverter

About This Product

The SMA Sunny Tripower X 20-US-50 20kW Three-Phase Inverter is a commercial three-phase string inverter designed for 480 V solar installations in the US market. Part of SMA’s Sunny Tripower X platform, this 20 kW model combines DC-to-AC power conversion with integrated AFCI, a DC disconnect, and a SunSpec Certified Rapid Shutdown transmitter to support code-compliant commercial PV system design.

Who This Product Suits

The SMA Sunny Tripower X 20-US-50 is suited to commercial and larger three-phase solar projects using a 480 V electrical service. It is a practical choice for installers designing rooftop or ground-mounted PV systems that require a dedicated three-phase string inverter and integration with NEC rapid-shutdown requirements. System voltage, array configuration, conductor sizing, overcurrent protection, and interconnection requirements should be confirmed by the system designer or qualified installer before installation.

Specifications Explained

• 20 kW power rating: Provides up to 20,000 watts of rated AC output for commercial PV applications.
• 480 V three-phase output: Designed for connection to compatible 480 V three-phase electrical systems commonly used in US commercial installations.
• Integrated AFCI: Arc-fault detection functionality is incorporated into the inverter for supported PV system configurations.
• DC disconnect: An integrated DC disconnect provides a means of isolating the PV DC input during installation, servicing, and shutdown procedures.
• Rapid shutdown support: Includes a SunSpec Certified Rapid Shutdown transmitter for integration with compatible module-level rapid-shutdown equipment where required by the NEC.
• Commercial string inverter: The SMA design centralizes conversion at the string-inverter level rather than using a microinverter at each module.

Summary

The SMA Sunny Tripower X 20-US-50 is a 20 kW, 480 V three-phase grid-tied inverter for US commercial solar installations. Its integrated AFCI, DC disconnect, and SunSpec Certified Rapid Shutdown transmitter give installers key PV safety and shutdown functions in a single inverter platform. For appropriately designed 480 V three-phase systems, it provides a straightforward SMA string-inverter solution for commercial PV projects.

Further Information From The Manufacturer

Sunny Tripower X 20-US-50 (STP 20-US-50) 480VAC, AFCI, DC Disconnect, SunSpec Certified Rapid Shutdown Transmitter

About SMA

SMA Solar Technology is a German manufacturer with decades of experience in solar inverter development. The company is known for engineering-focused design, strict quality standards and strong grid-integration expertise.

SMA inverters are widely installed across residential, commercial and utility-scale projects worldwide. Their product range is recognised for stable output, robust monitoring and long-term reliability in professional solar applications.