SMA Sunny Tripower 125kW Three-Phase Solar Inverter STP125-70

Product description

The SMA Sunny Tripower 125kW STP125-70 Three-Phase Solar Inverter is SMA's high-power string inverter designed for commercial systems and ground-mounted plants up to MW range. It combines 125 kW of nominal power with 12 MPPT trackers and 24 string inputs to maximize yield on complex rooftops or fields with multiple orientations. Its electronics with OptiCool cooling, the ShadeFix optimization algorithm, ArcFix (AFCI) arc protection, and proactive Smart Connected monitoring ensure performance, safety, and minimal OPEX, all with comprehensive control from Sunny Portal (ennexOS).

Main features

• 12 independent MPPT with 2 strings per MPPT; usable current per tracker 30 A (max. Isc 40 A) for high-current modules.
• Wide MPPT window: 180–1000 V (nominal power 450–800 V, Vdc 600 V); max. DC voltage 1100 V.
• Nominal AC power 125 kW at 400 V three-phase (3 × 400/230 V, 50/60 Hz) with nominal current ≈ 181 A.
• Max. efficiency 98.4% (EU 98.1%), THD < 3%, active cooling OptiCool, and sound level < 71 dB(A).
• IP65 protection, operation from −25 °C to +60 °C; integrated DC switch and SPD Type I+II on DC and Type II on AC.
• Professional connectivity: 2×Ethernet, Wi-Fi, web interface, Modbus SMA/SunSpec and Speedwire, multifunction relay, and digital inputs for rapid shutdown/power limitation.

Advantages or benefits

• More real energy: ShadeFix mitigates losses due to shading and mismatches; I-V diagnostics identify anomalous strings for predictive maintenance.
• Flexible and scalable design: 12 MPPT/24 strings allow for combining multiple orientations and inclinations, reducing LCOE in large rooftops and decentralized plants.
• Enhanced safety with ArcFix (AFCI), RCMU, and insulation monitoring, increasing system protection and service continuity.
• Reduced OPEX: SMA Smart Connected offers proactive monitoring and incident management, minimizing downtime.
• Simple integration: native communication with the SMA ecosystem and SCADA via Modbus/Speedwire for active/reactive power control and zero feed-in.

Purpose or applications

Designed for commercial and industrial three-phase self-consumption, solar carports, agrivoltaics, and ground-mounted plants with distributed architecture. Its IP65 protection rating allows for outdoor installation without a technical room. This is not a hybrid inverter and does not include a battery or backup; for storage or backup, it integrates with AC-coupled solutions from the SMA ecosystem.

Technical specifications

Compatibilities

Direct integration with the SMA ecosystem: SMA Data Manager M, Sunny Portal (ennexOS), and SMA Energy Meter for feed-in and reactive power control. Compatible with charging infrastructure via SMA EV Charger 7.4 kW and SMA EV Charger 22 kW. Official accessories: DC/AC surge protection kits, I/O modules, and monitoring and SCADA solutions via Modbus/SunSpec.

SMA Sunny Tripower 125kW STP125-70 Three-Phase Solar Inverter offers industry-leading power, 12 high-current MPPTs, advanced protection, and professional integration to maximize performance and availability in large self-consumption installations and commercial plants.