Explore our top-tier commercial-grade EV chargers, bi-directional converters, and specialized testing simulators precision-engineered for global deployment.
Dongguan Rama Charger Technology Co., Ltd. – Leading Premier Tier-1 Manufacturing & Custom Engineering Infrastructure
Dongguan Rama Charger Technology Co., Ltd. is a premier, technology-driven enterprise integrating R&D, design, manufacturing, sales, and service into a seamless, end-to-end operation. We specialize in providing comprehensive system energy solutions engineered for electric vehicle charging infrastructure, vehicle-to-grid (V2G) integration, commercial fleet depots, and data center energy ecosystems.
With deep, independent R&D capabilities in charging control hardware and firmware topology, Rama Charger supplies customized core master control boards for global charging pile manufacturers and charge point operators (CPOs). Over the years, we have forged strategic OEM/ODM partnerships with leading charging pile enterprises domestically and internationally, consistently delivering robust, high-availability solutions tailored to demanding operational environments.
Analyzing the shift from legacy 400V charging to ultra-fast 1000V Silicon Carbide (SiC) matrix systems for enterprise procurement.
Modern fast-charging stacks are transitioning from traditional Silicon IGBTs to Wide Bandgap Silicon Carbide (SiC) MOSFETs. SiC power modules deliver up to 96.5% peak conversion efficiency, reducing thermal dissipation losses by 30% and enabling ultra-compact 20kW–30kW power module density.
To deliver 480kW to 600kW charging speeds without overwhelming cable weights, liquid-cooled charging cables circulate synthetic coolants inside the connector assembly. This enables continuous 800A/1000A throughput at safe operating temperatures under continuous load.
Bidirectional AC/DC power converters (20kW–22kW) enable commercial fleets to transform electric vehicles into distributed energy storage resources (DERs). Fleet operators can execute Peak Shaving, Demand Response, and V2H (Vehicle-to-Home) back-up power strategies seamlessly.
| Architecture Feature | Legacy 400V Generation | Next-Gen 800V/1000V SiC Systems | Rama OEM/ODM Solution Advantage |
|---|---|---|---|
| Peak Power Module Efficiency | 92.0% - 94.0% (Si-IGBT) | 96.5% - 97.5% (SiC MOSFET) | Integrated SiC Master Control Board with THDi < 2% |
| Thermal Dissipation Method | Forced Air Cooling (High Noise) | Direct Liquid Cooling (Low Noise) | Supports 800A Liquid Cables + Dual-Loop Sensing |
| Communication Protocol | Basic CAN / OCPP 1.6J | OCPP 2.0.1 + ISO 15118 (Plug & Charge) | Hardware-Ready Master Board with Encrypted Hardware Security |
| Bidirectional Capabilities | Unidirectional (G2V Only) | Full Bidirectional (V2G, V2H, V2X) | 22kW 1000V AC/DC Modules & Battery Simulators |
Tailored electrical architectures for commercial fleet operators, energy storage integrators, and heavy transport equipment.
From municipal transit bus stations to last-mile logistics hubs, our high-power DC fast charging solutions feature dynamic load management, minimizing grid transformer upgrades while maximizing vehicle uptime.
Combining bidirectional battery simulators and containerized energy storage units to buffer high-power charging demand. Core modules enable zero-flicker switching between solar PV, energy storage, and EV loads.
Extending precision hardware engineering to heavy commercial vehicle pneumatic controls (valve assemblies) and high-density surge-protected rack PDUs engineered for high-availability server centers.
From initial board-level R&D customization to global logistics and after-sales support, Rama Charger delivers end-to-end reliability.
Explore our complete hardware line including high-current liquid cables, CCS2/GBT adapters, hand brake valves, and access control readers.
Addressing critical questions regarding ODM micro-controller customization, compliance standards, grid balance, and bulk logistics.
We specialize in designing and manufacturing proprietary master control boards, power conversion modules (AC/DC & DC/DC), human-machine interface (HMI) displays, and custom outer enclosures. Whether you require specific communication protocols (OCPP 1.6J/2.0.1, ISO 15118), custom branding, or specific thermal management layouts (liquid vs. forced air), our engineering team builds tailored solutions from the schematic level upward.
Yes. Our manufacturing protocols align with DEKRA CB, CE, and ISO9001 quality management systems. Our chargers support universal standard pinouts including CCS1 (North America), CCS2 (Europe), NACS (Tesla standard), CHAdeMO, and GB/T (China), ensuring seamless grid integration and regulatory compliance in destination markets.
Bidirectional charging (V2G/V2H) allows electric vehicle fleets to act as energy storage assets. During peak grid tariff hours, energy stored in vehicle batteries can be fed back into the facility microgrid or utility grid (peak shaving), generating auxiliary revenue and cutting facility operating expenses while maintaining operational readiness.
We manufacture specialized testing instruments, including the Portable 400V AC Type2 EV Charger Simulator and multi-protocol DC charging testers (CCS1, NACS, CHAdeMO, GB/T). These devices emulate battery management system (BMS) communications and load demands, allowing technicians to validate station operation without needing physical EV vehicles on-site.
Standard air-cooled copper cables capable of carrying 500A+ would be excessively thick, heavy, and unmanageable for users. Liquid cooling continuously circulates coolant around the internal conductor cables, maintaining thermal stability even at 800A–1000A continuous output. This prevents thermal degradation, reduces cable weight by up to 40%, and extends component lifespan.
Rama Charger
