SMA Sunny Tripower X 25-US-50 25kW Three-Phase Inverter

About This Product

The SMA Sunny Tripower X 25-US-50 25kW Three-Phase Inverter is a commercial grid-tied solar inverter designed for three-phase photovoltaic installations operating on 480V AC electrical systems. Part of SMA’s Sunny Tripower X series, this inverter converts DC power from solar arrays into utility-compatible AC power for commercial and industrial applications.

The STP 25-US-50 includes integrated arc-fault circuit interruption (AFCI), a DC disconnect, and a SunSpec-certified rapid shutdown transmitter. These features support system safety, installation efficiency, and integration with compatible rapid shutdown equipment. The inverter is designed for professional installation in accordance with applicable NEC requirements and local electrical codes.

Who This Product Suits

The SMA Sunny Tripower X 25-US-50 is suited to commercial solar contractors, electrical installers, and system designers working with three-phase, 480V grid-connected solar installations.

• Commercial buildings with compatible three-phase electrical infrastructure.
• Industrial facilities installing rooftop or ground-mounted photovoltaic arrays.
• Businesses seeking to offset daytime electricity consumption through solar generation.
• Solar installers requiring integrated AFCI protection and DC isolation.
• Projects incorporating compatible SunSpec rapid shutdown equipment to address applicable NEC requirements.

Installers should confirm utility interconnection requirements, available service voltage, solar array compatibility, and rapid shutdown system design before specifying this inverter.

Specifications Explained

• Manufacturer Model: Sunny Tripower X 25-US-50 (STP 25-US-50), SMA part number 03-25-1000-2-50.
• Rated AC Output: 25kW, suitable for commercial-scale solar generation.
• AC Voltage: 480V, designed for compatible three-phase electrical systems.
• Inverter Type: Grid-connected three-phase solar string inverter.
• Arc-Fault Protection: Integrated AFCI functionality provides protection against detected DC arc-fault conditions.
• DC Disconnect: Integrated disconnect provides a means of isolating the photovoltaic DC input during servicing and maintenance.
• Rapid Shutdown: Includes a SunSpec-certified rapid shutdown transmitter for integration with compatible rapid shutdown devices.
• Manufacturer Warranty: Supplier-listed warranty of 5.25 years. Confirm applicable warranty terms and registration requirements with SMA.

Final system design should account for PV string voltage, input current limits, compatible rapid shutdown devices, utility requirements, and applicable NEC provisions.

Summary

The SMA Sunny Tripower X 25-US-50 is a 25kW, 480V three-phase grid-tied inverter intended for commercial solar installations. Its integrated AFCI, DC disconnect, and SunSpec-certified rapid shutdown transmitter provide practical features for professional system design and installation.

For contractors specifying commercial photovoltaic systems, this SMA inverter offers a straightforward solution for converting solar DC power into three-phase AC power while supporting applicable electrical safety and interconnection requirements.

Further Information From The Manufacturer

Sunny Tripower X 25-US-50 (STP 25-US-50) 480VAC, AFCI, DC Disconnect, SunSpec Certified Rapid Shutdown Transmitter

Specifications

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.