The engineering team behind grid-ready charging
ems-charge is an EV charging station OEM/ODM manufacturer in Shenzhen. One team designs and builds AC chargers, DC fast chargers, charging power modules and the OCPP platform that runs them — from power stage to cloud.
A manufacturer built on power electronics.
Global electric-car sales passed 17 million units in 2024 and keep climbing. Behind every grid-ready charger is a power-electronics problem: rectifying, converting and controlling mains power safely from −30°C to +55°C, at 95%+ efficiency, while the grid watches your harmonics. ems-charge was founded to solve exactly that. We keep the full signal path in-house — SiC power modules, firmware, enclosures and certification — so the charger that leaves our Shenzhen factory is the same one your engineers qualified, in 30+ export countries.
Engineers, not just assemblers.
The same team that specifies SiC power modules, writes OCPP firmware and drives UL certification reviews your charger — so a technical question gets an engineering answer, not a sales script.
- 300+ staff across R&D, SMT, assembly and test.
- 20,000 m² factory floor with in-house EMC and environmental chambers.
- 48-hour burn-in and 33 environmental tests on every production unit.
| Power range | 3.7–360 kW |
|---|---|
| Module efficiency | 96.5% peak (SiC) |
| System efficiency | >95% AC · ≥93% DC |
| Topology | Vienna rectifier + LLC |
| THDi | <5% |
| Export markets | 30+ countries |
We own the hard part of the charger.
Most charger brands buy power modules and wrap an enclosure around them. We design the module, the firmware and the certification stack ourselves.
- In-house power modules — our 30 kW air-cooled and 40 kW liquid-cooled SiC modules reach 96.5% peak efficiency, not a bought-in black box.
- SiC power electronics lift system efficiency 5–10% and cut cooling volume 30–40% versus IGBT designs.
- Full spectrum — AC 3.7–22 kW and DC 30–360 kW, one platform for home, fleet and corridor.
- Certification-ready — CE, UL 2594/2202/2231, IEC 61851-1 and ISO 15118 mapped to your market before the first sample.
Fifteen years, one focus.
- 2010
Founded as a power-electronics lab
Started in Shenzhen as a contract manufacturer of industrial power converters, building the rectifier and inverter expertise the chargers would later need.
- 2015
First AC wallbox line
Shipped the first AC wallbox and obtained CE certification, opening the European market.
- 2019
DC fast-charger line
Launched DC 30–180 kW fast chargers and filed UL 2594 for North America, moving into fleet and commercial charging.
- 2022
40 kW SiC liquid-cooled module
Reached 96.5% peak module efficiency with SiC MOSFETs and added ISO 15118 Plug&Charge support.
- 2025
OCPP 2.0.1 platform GA
Released the charging management platform and crossed 30+ export countries, with OEM/ODM as a formal service line.
Work with the team that built the modules.
Tell us your target market and power level — we reply within 48 hours with specs, certification scope and lead time. OEM/ODM from Shenzhen, MOQ from 1 unit.
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