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Purpose-built inverter solutions delivering stable, high-efficiency DC-to-AC power conversion for passenger trains, freight locomotives, metro systems, and high-speed rail networks.
Compact pure sine wave inverter designed for railway passenger coaches and control systems.
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Mid-range capacity inverter for lighting, HVAC auxiliary, and onboard communication systems.
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High-power inverter for metro carriages, high-speed rail auxiliary power units, and freight trains.
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Industrial-grade heavy-duty inverter for locomotive auxiliary systems and large-scale rail projects.
View DetailsThe global railway inverter market is undergoing rapid transformation, driven by electrification mandates, smart rail initiatives, and the transition to cleaner, more efficient traction systems.
Global high-speed rail networks are expanding at an unprecedented pace. Countries across Asia, Europe, and the Americas are investing heavily in HSR infrastructure, creating massive demand for advanced train inverters capable of operating at 300+ km/h with zero tolerance for power interruption.
Rail operators worldwide are replacing diesel-powered rolling stock with fully electric or hybrid alternatives. Train inverters are the cornerstone of this transition, converting battery or pantograph DC power into stable AC for traction motors, HVAC systems, and passenger amenities.
Rapid urbanization is fueling unprecedented growth in metro, subway, and light rail transit projects globally. Each new metro line requires hundreds of train inverters for auxiliary power, door control, lighting, and safety systems, representing a multi-billion-dollar annual market.
The freight rail sector is modernizing its aging fleet with digital monitoring, automated braking, and electrified auxiliary systems — all requiring reliable, vibration-resistant inverters that can withstand harsh industrial environments and extended duty cycles.
Modern passenger trains demand sophisticated APU systems to power lighting, air conditioning, catering equipment, Wi-Fi, and passenger information displays. Train inverters with high power density and low harmonic distortion are essential for delivering clean, stable power to all onboard systems.
Railway inverters must comply with stringent international standards including EN 50155, IEC 60571, and EN 50121. These certifications ensure electromagnetic compatibility, vibration resistance, temperature tolerance, and fail-safe operation in safety-critical rail environments.
The train inverter sector is evolving rapidly, shaped by digitalization, sustainability goals, and next-generation rail technology demands.
The global railway inverter market is projected to exceed $8.5 billion USD by 2030, growing at a CAGR of over 7.2%. Several powerful trends are converging to accelerate this growth and reshape product requirements across all rail segments.
Train inverters serve as the power backbone across every segment of modern railway operations. Here we explore the most critical and complex deployment environments.
In high-speed rail environments operating at 250–350 km/h, train inverters must provide ultra-stable AC output (±1% voltage, ±0.5% frequency) to power passenger entertainment systems, lighting, air conditioning, and safety electronics simultaneously. Our DC110V/220V to AC220V inverters are engineered with industrial-grade EMI filtering and vibration-damped enclosures to meet EN 50155 Class TX requirements.
Metro trains operate in stop-start cycles with extreme power transients during acceleration and braking. Train inverters in metro applications must handle rapid load changes, support regenerative braking energy recovery, and maintain continuous operation across thousands of daily duty cycles. Our inverters feature hot-swap capability and N+1 redundancy architecture for zero-downtime metro operations.
Freight locomotives demand inverters that can withstand extreme temperature ranges (-40°C to +70°C), heavy vibration, and continuous high-load operation over thousands of kilometers. Our ruggedized train inverters provide stable power for locomotive control electronics, cab climate systems, and communication equipment in the harshest industrial rail environments.
Battery-electric multiple units (BEMU) rely on bidirectional inverters to manage energy flow between traction batteries, pantograph, and auxiliary loads. Our inverters support seamless mode switching between catenary power, battery discharge, and regenerative charging, enabling efficient operation on both electrified and non-electrified sections of track.
Railway maintenance vehicles — including tamping machines, rail grinders, and inspection cars — require robust inverter systems to power hydraulic controls, measurement equipment, and crew facilities. These applications demand high surge capacity, wide input voltage tolerance, and protection against dust, moisture, and mechanical shock.
Beyond rolling stock, train inverters play a critical role in railway station infrastructure — powering platform screen doors, passenger information displays, emergency lighting, ticketing systems, and surveillance equipment. Our inverters provide reliable backup power solutions ensuring passenger safety during grid outages at critical station facilities.
Unlike commercial inverters, railway train inverters must meet the world's most demanding electrical standards. They operate in environments with extreme temperature swings, constant mechanical vibration, electromagnetic interference from traction systems, and zero tolerance for failure. Every Bangzhao (Sandi Electric) train inverter is engineered, tested, and certified to exceed these requirements — ensuring your railway operations run without interruption, mile after mile.
It is widely applied in industries such as solar energy, wind power, hydropower, automobiles, ships, trains, and hospitals. Aviation, automation, etc.
The system uses solar panels to convert solar energy into electricity, which is stored in batteries to provide a stable, clean supply of electricity for the lives of islanders. Its independence ensures energy self-sufficiency on remote islands, reducing dependence on traditional fossil fuels. Our industrial frequency off-grid inverters and photovoltaic controllers are sustainable and adapted to the harsh environment of the islands.
View MoreIt utilises new photovoltaic energy generation technology and oil pumping units to achieve green and efficient oil extraction. The system converts solar energy into electricity through photovoltaic modules to provide stable and continuous power support for oil pumps, eliminating the need to rely on traditional fossil fuels and greatly reducing gas emissions. The PV oil pump inverter has the advantages of high efficiency, modular design, industrial frequency isolation, strong load-carrying capacity and easy maintenance after sale.
View MoreProvide power for all electrical equipment on board. It needs to adapt to the complex environment at sea, ensure the stable operation of navigation, communication, living facilities, etc., frequency and voltage stabilisation, Low frequency isolation type, strong anti-interference ability, and conform to the approval of Classification Society CCS.
View MoreThe new energy charging pile energy storage system, integrating inverter charging and energy storage technologies, provides green charging solutions for electric vehicles. The system utilises clean energy such as solar and wind to generate electricity and stores it through energy storage equipment to ensure stable power supply to charging facilities. Its advantages lie in optimising energy allocation, balancing the load on the power grid, improving charging efficiency.
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Solar water pumping system, using pure photovoltaic direct drive three-phase AC water pump, can be combined with utility power complementary. The system converts solar energy into electricity through solar panels, which is supplied to the water pump in real time to achieve efficient pumping for irrigation or water supply. Its advantages are zero carbon emission, low operation and maintenance costs, especially suitable for remote areas without electricity.
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Integrated bidirectional train inverter solution for battery-electric multiple units (BEMU), enabling seamless energy management between traction battery systems and onboard auxiliary loads. The system supports regenerative braking energy recovery, reducing overall energy consumption by up to 30% while maintaining stable AC output for all passenger-facing systems throughout the journey.
View MoreBangzhao Electric Co.,Ltd (Sandi Electric) is a company who was established in 2008 and specialized in developing and supplying of power products. The high performance of its products stems from the cutting-edge technology developed by the domestic top 100 engineers.
During the past 10 years, we have been providing the best system solutions of Lithium battery storage system, PCS bi-directional energy storage power supply, Pure sine wave inverter, Marine inverter, Vehicle Inverter, Solar pump inverter, Explosion-proof inverter, PV Inverter-Controller Integrate, PV combiner box, Solar charge controller, AC-DC charger, Static phase converter etc. to customers, it is widely applied in the industry of solar energy, wind power, water power, car, ship, train, hospital, aviation, automation, etc.
We believe that through our continuous efforts and pursuit, we can become one of the most influential enterprises between domestic big-power inverter manufacturers.
Bangzhao Electric Co., Ltd (Sandi Electric) regard technological innovation and best service as the fundamental of business development. The annual technology development investment cost is more than 20% of the annual sales, with an experienced and top professional research and development team, obtained a number of certificate and patent of power products, we are cooperation supplier of many famous companies.
"Integrity, Rigorous, Pragmatic" is the continuous pursuit of the Bangzhao Electrical. Facing today and the future, we will provide more professional and perfect services to the public who support and trust Bangzhao Electric (Sandi Electric).
The company was established in 2008.
The company has more than 12 solutions.
Certificates & Patents
Cooperating countries worldwide
Our culture drives every product we engineer — from a 2KVA train inverter to a 20KVA railway auxiliary power unit.
Continuously advancing power electronics technology for next-generation railway systems.
Understanding our customers' railway operational challenges to deliver truly effective solutions.
Partnering with global railway operators, integrators, and OEMs to build lasting relationships.
A team with strong execution ability is a combative team. Action ability and execution ability are the factors that determine the success or failure of an enterprise.
To become the world's most trusted supplier of railway-grade inverter and power conversion solutions.
We believe that through our continuous efforts and pursuit, we can become one of the most influential enterprises between domestic big-power inverter manufacturers.
As a manufacturer, we eliminate middlemen to deliver the best value on every train inverter order — from single units to large-scale railway fleet deployments.
Every railway project has unique requirements. We offer full OEM/ODM customization of input voltage, output power, enclosure rating, communication interfaces, and certifications.
Our global service network provides rapid technical support, spare parts supply, and on-site maintenance assistance to keep your railway operations running at peak performance.
All our train inverters are backed by internationally recognized certifications ensuring compliance with global railway electrical and safety standards for your peace of mind.
With an experienced and top-notch professional R&D team, it has obtained multiple certificates and patents for power supply products and is a cooperative supplier for many well-known companies.
With an experienced and top-notch professional R&D team, it has obtained multiple certificates and patents for power supply products and is a cooperative supplier for many well-known companies.
A glimpse into our manufacturing facilities, R&D capabilities, and quality control processes that make Bangzhao Electric a trusted global supplier.
"Integrity, Rigorous, Pragmatic" is the continuous pursuit of the Bangzhao Electrical. Facing today and the future, we will provide more professional and perfect services to the public who support and trust Bangzhao Electric (Sandi Electric).
Company Profile
3 Phase AC-DC Battery Charger
Pure Sine Wave Inverter
diesel-lithium hybrid storage system
48VDC-220VAC inverter
wind-solar hybrid storage system
120/240V split phase to 380V AC converter
200kw AC-DC charger
256kwh storage system
86kwh storage system
Bangzhao Electric Co., Ltd (Sandi Electric) regard technological innovation and best service as the fundamental of business development.
From Asia-Pacific high-speed rail networks to European metro systems and African freight railways, our train inverters power critical rail infrastructure across every continent.
Explore our full lineup of railway-grade inverters — engineered for every train type, power requirement, and operating environment across the global rail industry.
Heavy-duty 30KVA inverter for large-scale railway auxiliary power applications.
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Industrial 40KVA inverter for metro and high-speed rail auxiliary systems.
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50KVA high-capacity inverter for locomotive and freight train applications.
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60KVA industrial inverter for demanding railway power conversion needs.
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80KVA high-power inverter for large passenger train auxiliary power units.
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100KVA enterprise-grade inverter for the most demanding rail power systems.
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120KVA modular inverter platform for high-speed and intercity rail networks.
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150KVA flagship inverter for the most complex and power-intensive railway applications.
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