High-Efficiency Solar Farm Inverter Unit for 10kv to 35kv

Product Description

TSTY Energy Storage Converter and StepUp Integrated Unit

TSTY Electric Co., Ltd. offers a high reliability photovoltaic step up substation, also known as a prefabricated substation or compact substation for solar and storage applications. This integrated power conversion and distribution unit organically combines a high voltage switchgear, a step up transformer (oil immersed or dry type), and a low voltage power distribution device, together with an optional power conversion system (PCS) and inverter interface. Designed specifically for photovoltaic power plants and battery energy storage systems (BESS), it fulfills DC to AC inversion, transformer step up (e.g., 0.69kV to 35kV), and low voltage power distribution: all in one enclosure. The complete assembly is installed in a moisture proof, rust proof, dust proof, rodent proof, fire proof, anti theft, heat insulated, fully enclosed, and movable steel structure, suitable for long term outdoor operation in harsh environments such as deserts, coastal areas, and high altitude regions. All TSTY substations are manufactured in our 250,000 square meters mart factory, backed by 30+ years of power equipment experience and certified to IEC, CE, SGS, and ISO9001.

Applications

1. Highly Integrated and SpaceSaving
Combines PCS, transformer, switchgear, and auxiliary systems in one enclosure.

Reduces footprint by up to 50% compared to traditional stickbuilt solutions.

Factory preassembled and precommissioned – onsite installation requires only simple docking and cable connection.

2. Bidirectional Power Conversion
Supports both charging (grid to battery) and discharging (battery to grid) operations.

Enables peak shaving, load shifting, frequency regulation, and renewable energy smoothing.

Advanced functions: black start, virtual synchronous generator, islanding operation.

3. High Protection and Extreme Environment Tolerance
Fully sealed enclosure: IP54 for HV/LV compartments, IP68 for oil tank (American type).

Special anticorrosion and UV treatment – resists salt spray, sandstorms, and intense sunlight.

Wide operating temperature range (-40°C to +60°C) and high altitude capability (up to 4500m with derating).

Key Configurations

Power: 500kVA to 10MVA per unit

Voltage combinations: 0.48kV/0.69kV/1.14kV → 10kV/20kV/33kV/35kV/66kV/229kV

Cooling: ONAN, ONAF, or forced air for dry type

Enclosure: IP54 to IP65, C4 to C5 M anti corrosion

Standards: IEC 60076, IEEE C57, CE, SGS, ISO9001

PV Transformer Substation

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Technical Specifications

(Custom configurations available upon request.)

TSTY Energy Storage Converter and StepUp Integrated Unit
Feature	Description
Integrated Design	Combines inverter interface, step up transformer, HV/LV switchgear, and monitoring in one enclosure – reduces footprint and civil works.
High Protection	Fully sealed enclosure. HV/LV compartments reach IP54, transformer tank (oil immersed) reaches IP68 – dustproof, moisture proof, and submersible.
Efficient Cooling	External plate type radiator for easy assembly and maintenance. Natural oil circulation (ONAN) or forced air (ONAF) options.
Strong Environmental Adaptability	Special shot blasting and anti corrosion treatment resists UV, salt spray, sandstorms, and extreme temperatures (-40°C to +55°C). Suitable for deserts, coasts, and high altitudes.
Intelligent Monitoring	Transformer tank can be equipped with pressure gauge and thermometer with communication interface; load switch can include travel switch. Enables remote monitoring, operation, and maintenance via SCADA or cloud platform.
High Breaking Capacity	Low voltage side uses advanced intelligent circuit breakers and moulded case switches, offering excellent protection and high breaking capacity.
Safety & Reliability	Transformer oil serves as insulating medium for 10kV/35kV components, reducing safety distances. Oil is fully isolated from atmosphere, minimizing oxidation and moisture ingress.

Company Profile

TSTY Electric Co., Ltd.

TSTY Electric Co., Ltd. was established in 1995 and is located in Jiaxian County, Henan Province. It is a digital management enterprise integrating R&D, production, sales and installation of power equipment. The company's products cover 6kv, 11kv, 22kv, 35kv, etc. Power transformers, distribution transformers, box-type substations, high and low voltage switchgear, wind power, photovoltaic power generation equipment, etc.TSTY Products are sold to the Middle East, North America, South America, Europe, Southeast Asia, Africa and other regions, covering more than 40 countries.
At present, the company has three factory areas including dry transformer workshop, oil transformer workshop and intelligent complete workshop, with a construction area of 250,000 square meters, 360 employees, and 128 invention patents. The technical performance of the products has reached the advanced level in the same industry in the world, and the quality is safe and reliable. The products have passed IEC, SGS, intertek, CCC, CE and other international certifications. 

Why Choose Us?

TSTY Advantages

TSTY Electric has over 30 years of experience in power equipment manufacturing. We operate a 250,000 square meter smart factory with an annual output of 25,000 transformers. Our products hold international certifications including IEC, CE, SGS, UL, and ISO9001. We also maintain a CNAS accredited testing laboratory and hold 158 core patents. Our oil immersed transformers, dry type transformers, compact substations, and energy storage systems are trusted in more than 80 countries worldwide.

We provide end to end technical support from pre sales engineering to after sales service. Our overseas offices are located in Zambia, Ethiopia, Kazakhstan, Colombia, and Italy. We offer 24 hour online assistance and 48 hour emergency response globally. As a National Green Factory and National High Tech Enterprise, we focus on energy efficient and environmentally friendly solutions. Our customer satisfaction rate exceeds 99 percent, guided by the principle of one time cooperation, lifelong service.

FAQ

Q:what's your major products?

A: oil immersed transformer, dry type transformer, Transformer Substation, High and Low Voltage Switchgear 

Q: Can your product be customerized? 
A: Considering differences in voltage, frequency and other speciality of transformer product in different countries and regions,our product can be customerized according to your requirements. 

Q: When can I get the price? 
A:Usually we quote within 24 hours after we get your inquiry. 

Q: What about lead or shipping time? 
A: The lead time depends on the quantity you ordered, generally within 15 days upon receipt of advance payment. 

Q: What is the price of shipping? 
A: Depending upon the port of delivery, prices varies.

Q: Do you offer guarantee for the products? 
A: Yes. We offer at least one years guarantee for all of our transformers.

Q: Your Advantage?
A: 15 years experience, Advanced production equipments, Stable quality, Fast delivery, Professional & good & Prompt service. Also some free parts can be provided for you.