Increasing vehicle electrification has opened a niche for power supplies, such as DC-DC converters and inverter modules, which are not required in most internal combustion engine vehicles. In electric vehicles, DC-DC converters manage voltage levels. These bring down 400 to 800VDC from the traction battery to 12, 24 or 48V to power auxiliary systems such as lights, infotainment devices, sensors, start-stop motors and control units. Inverter modules, meanwhile, convert the traction battery’s DC power into AC to drive the electric motor.
For their critical roles in EVs, these power components must comply with steeper reliability, stability and durability requirements. They must withstand the unique demands in an automotive environment, which include vibration, humidity and temperature changes. In addition, DC-DC converters and inverter modules must be compact and light weight and offer high efficiency to contribute to vehicle range and overall performance.
In China, suppliers of DC-DC converters can realize an efficiency of 90 percent, with some able to reach 95 percent. Guangzhou Chengz Industrial Co. Ltd, one of the suppliers contacted for this report, achieved a typical efficiency of 96 percent in its model A1U4830. The unit, designed for surface mounting, has built-in protection from overcurrent, -voltage and -temperature conditions, uses free air convection cooling and is IP68-rated.
Integration is another major trend, leading some Chinese makers to introduce on-board chargers with DC-DC converters. Shinry Technologies, for instance, has developed such integrated solutions with up to 96 or even as high as 98 percent efficiency, available in unidirectional and bidirectional types and compliant with ASIL risk classification system defined by defined by ISO 26262. The bidirectional version enables vehicle-to-load (V2L) and vehicle-to-grid (V2G) features.
High growth
The market for EVs has been skyrocketing in recent years, realizing $505.267 billion in 2023 or a CAGR of 35.41 percent from 2019 to 2023, according to Qianzhan Industrial Research Institute. This rose to $582.1 billion in 2024, with the two-digit growth expected in 2025 and 2026.
Benefiting from this application, China’s on-board power supplies sector is projected to hit $9.72 billion in 2025, according to Chinabaogao. This is a big jump from its value of $3.42 billion in 2021 and farther back in 2017 when it only reached $755 million.
This upward trend is reflected in the country’s market for DC-DC converters for EVs, which garnered $932 million in 2021, $1.72 billion in 2022, $2.5 billion in 2023 and $3.046 billion in 2024, according to Guanzhi Hainei Consulting.
The coming years are expected to see more growth, encouraging production expansion. Shinry invested $193 million in a new on-board power supplies project, which will have an annual output of 53,100 DC-DC converters for EVs, 73,900 on-board chargers and 1.37 million on-board integrated power supplies.
Largest production base
The Asia-Pacific region is the biggest manufacturing hub for DC-DC converters, accounting for nearly half of market share, according to Market Monitor.
China leads the pack, with nearly a thousand DC-DC converter and inverter module makers led by VMAX, Shinry, Enpower, EV-Tech, Derun, INVT, Baseus and Ugreen. These first-tier suppliers have formed a long-term partnership with domestic EV manufacturers and foreign-invested factories.
Over half of the suppliers are found in Guangdong, Zhejiang and Jiangsu, specifically in Shenzhen, Dongguan, Zhongshan, Guangzhou, Suzhou, Kunshan, Changzhou, Nanjing, Ningbo and Hangzhou.
China-made EV power supplies
Typical DC-DC converters for EVs are boost, buck, buck-boost and stabilization types in versions with an IP65 or above rating. These have an input voltage of 200 to 480VDC, output power of 800W to 350kW and efficiency of more than 90 percent, all with safety features that guard from over- and undervoltage, overload, overheat and short circuits.
In the inverter module category, various options are available, with input voltage ranging from 200 to 800VDC, frequency of 50/60Hz, output power of 2 to 100KW and efficiency exceeding 90 percent. They are also equipped with built-in safety features to ensure optimum performance.
Manufacturers remain open to customization.
There are also companies that offer DC-DC converters for fuel cell vehicles. Interviewed supplier Precision Sourcing SCM (Xiamen) Co. Ltd has a series of buck, boost and buck-boost units with an efficiency rating of up to 99 percent. These DC-DC converters, with an optional built-in power distribution unit, have 80 to 450VDC input voltage, 300 to 800VDC output voltage, 500A continuous input and 300A continuous output current, and 60 to 350kW output power.
Key parts used in producing these DC-DC converters and inverter modules, including MOSFETs, rectifiers, filters, passive components, PCBs and cases, come from domestic or overseas companies, depending on buyers’ preferences.
So far, there have been no increases in component costs and product prices since 2024, a trend that will likely persist in the rest of 2025.
The products in this gallery have been handpicked by our market analyst for representing current trends in power supplies from manufacturers in China and Taiwan.
Inverter, 450W surge power
Company: Drow Enterprise Co. Ltd
From Drow, this RoHS-compliant power inverter, the GP-12-150U, has 10 to 15VDC, 60Hz input, 115VAC output voltage and 150W continuous power output. It offers 450W surge power and 90 percent efficiency. The product has built-in protection from short circuits and overloading.
MOQ: Negotiable
Lead time: 7 days
DC-DC converter, 48V, 30A output
Company: Guangzhou Chengz Industrial Co. Ltd
Guangzhou Chengz offers this DC-DC converter, the A1U4830, with 12V input voltage, 48V, 50kHz, 30A output and ±1.5 percent voltage accuracy. This device is IP68-rated and has built-in protection from overcurrent, -voltage and -temperature.
MOQ: 2 boxes
Lead time: 7 days
DC-DC converter, charger in one
Company: Precision Sourcing SCM (Xiamen) Co. Ltd
The Charger+Converter-0590 from Precision Sourcing SCM is a 2kW DC-DC converter with a 6.6kW bidirectional on-board charger. It has 85 to 265VDC input voltage and 260 to 480VDC, 0 to 22A output. This IP67-rated unit has short-circuit, overvoltage, -current, -temperature, -charging and undercharging protection.
MOQ: Negotiable
Lead time: 15 days
DC-DC converter with BLDC motor, controller
Company: Weihai PTC International Co. Ltd
Weihai PTC’s DC-DC converter, the PTC DC-DC, integrates a BLDC motor and a controller. It conforms to CE requirements.
MOQ: Negotiable
Lead time: 10 days
