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STT Series

Product catalog summary

Overview: The STT Series is a range of three-phase, on-grid solar inverters with dual Maximum Power Point Trackers (MPPTs), offering a maximum efficiency of 98.6% and IP65 protection. The series supports power outputs from 4kW to 25kW.

Key Features:

High reliability with effective heat dissipation and integrated lightning protection for both DC and AC.
Adaptability to complex power grids and various installation environments due to high anti-corrosion ability and wide operating temperature and altitude ranges.
High yield with a maximum efficiency of 98.6% and European weighted efficiency of 98.2%.
Extended working hours enabled by lower start-up voltage and wider MPPT range.
Continuous output overloading capacity up to 10%.
Compatibility with high-power panels due to a maximum input current of 15A.
Support for wireless and wired internet connections, with remote upgrading capabilities.
Easy configuration via an app or OLED display.

Model Specifications:

Models range from STT-4KTL-P to STT-25KTL-P, with varying input and output power specifications.
All models feature a start-up voltage of 180V, a minimum DC voltage of 150V, and a maximum DC input voltage of 1,100V.
Each model includes 2 MPPTs and supports a maximum input current of 15A or 30A, depending on the model.

Efficiency and Protection:

Maximum efficiency ranges from 98.1% to 98.6% across models, with MPPT efficiency consistently at 99.9%.
Integrated protection features include DC reverse polarity, insulation resistance, surge, over-temperature, residual current, anti-islanding, AC short-circuit, and AC over-voltage protection.

General Data:

Dimensions are consistent across models at 550W x 410H x 175D mm, with weights varying from 23kg to 29kg.
Operating temperature ranges from -30°C to 60°C, with a maximum operating altitude of 4000m (derating above 3000m).
Noise levels are maintained below 25dB or 40dB, depending on the cooling method.

Compliance: The series complies with multiple international standards, including IEC, EN, VDE, and others, ensuring broad compatibility and safety.

Catalog excerpts

STT 4~25kW Three Phase | 2 MPPTs | ON Grid High reliability due to good heat dissipation design Integrated lightning protection for both DC and AC SAFE & RELIABLE Adapt to complex power grid High anti-corrosion ability with aluminum alloy die casting technology Wider working temperature and altitude, adapt to various installation environments High yield with Max. 98.6% efficiency European weighted efficiency 98.2% HIGH YIELD Longer working hours due to the lower start-up voltage and wider MPPT range Up to 10% continuous output overloading capacity With a max input current of 15A, compatible with high-power panels Support wireless and wired internet connection (RS485, WiFi/GPRS/LAN optional) Remote upgrading available Fast and easy configuration via App or OL

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STT Series

STT Series

Catalog excerpts

All Ningbo Sunways Technologies Co., Ltd. catalogs and technical brochures