vSECC.MCS is a production-ready Megawatt Charging System (MCS) controller for the infrastructure side of heavy-duty vehicle charging. The controller connects vehicle, charging station management system (CSMS), power electronics and peripherals, supporting MCS charging up to 3.75 MW alongside CCS and NACS. Implements the ISO 15118-20 Amendment for high-level communication and IEC 61851-23-3 for low-level control. Designed for charging infrastructure manufacturers building high-power charging systems for trucks, marine vessels, mining equipment, tractors and eVTOL applications.
Many Interfaces. One Controller.
vSECC.MCS manages MCS, CCS, and NACS communication stacks simultaneously, covering both high-level and low-level control. The hardware and software interfaces are identical to vSECC, enabling straightforward switching between product variants.
Vehicle Communication
vSECC.MCS runs the EVSE side of the MCS and CCS communication stacks simultaneously. For MCS, low-level communication follows IEC 61851-23-3 and high-level communication follows ISO 15118-20 Amendment over 10BASE-T1S. For CCS and NACS, the standard ISO 15118-2 and ISO 15118-20 stacks apply over HomePlug GreenPHY PLC. Plug & Charge, bidirectional DC BPT and user authentication via EIM, RFID and Autocharge are all supported.
Backend Communication
vSECC.MCS connects to any OCPP-compliant Charging Station Management System (CSMS) via OCPP 2.0.1 or OCPP 1.6. Session data, energy metering, fault states and authorization flows are handled by the OCPP layer. OCPP 2.0.1 also carries smart charging profiles from the CSMS, enabling the backend to set charging power limits dynamically per connector. vSECC.MCS connects to external service systems in fleet applications with value-added service servers, enabling features such as bus preconditioning according to VDV 261.
Station Integration and Power Control
vSECC.MCS connects the vehicle communication stack with the station’s power electronics, safety functions and local user interfaces. Charging current and voltage setpoints negotiated with the vehicle, up to 3000 A and 1250 V DC, are translated into power electronics commands via CAN bus. Existing CAN, RS232 and RS485 interfaces support integration with power modules, RFID readers and peripheral devices, while discrete signals enable LEDs and emergency functions. MQTT-based interfaces provide real-time charging process information to displays and payment terminals.
Why vSECC.MCS?
vSECC.MCS addresses core requirements for manufacturers developing MCS charging infrastructure for commercial and off-highway vehicles.
- Efficient: 3.75 MW for maximum uptime
MCS supports up to 3.75 MW of charging power, enabling rapid turnaround for heavy-duty commercial vehicles that cannot afford long charging stops. Fast and reliable charging is critical for commercial operations where vehicle downtime directly affects profitability. - Reliable: Tested and certified communication stack
vSECC.MCS implements the full MCS specification from the ground up, so manufacturers integrate a tested and certified communication stack rather than developing one from scratch. This reduces development effort and supports reliable MCS communication.
- Essential: The competitive requirement for heavy-duty markets
MCS is the charging standard for heavy commercial vehicles including long-haul trucks, construction equipment, mining vehicles, agricultural machinery and eVTOLs. Fleet operators and logistics companies already specify MCS capability in infrastructure procurement. vSECC.MCS gives manufacturers and Tier-1 suppliers a market-ready MCS controller. - Future-Proof: Built on active standardization
MCS standardization is still evolving. Vector participates actively in the working groups developing IEC 61851-23-3 and the ISO 15118-20 MCS Amendment, so vSECC.MCS reflects the current state of standardization. Remote software updates via OCPP allow updates as standards are finalized.
Which Connector Types Does vSECC.MCS Support?
vSECC.MCS supports MCS, CCS and NACS, enabling multi-standard station designs with a single controller platform. Each charging point can be configured with one primary MCS connector and an optional CCS or NACS second connector, without hardware changes to the controller.
The Software Layer for vSECC.MCS
The functions of vSECC.MCS are implemented via the vSECC Software. vSECC Software handles all communication necessary for electrical charging: vehicle communication, backend management, power electronics control and peripheral device integration. The Linux-based system supports remote software updates via OCPP, enabling standard compliance and function extensions over the lifetime of the product.
Charging Standards
All relevant AC, DC and MCS charging communication standards supported, including ISO 15118-2/-3, ISO 15118-20 with Plug & Charge and bidirectional charging, DIN SPEC 70121, IEC 61851, and SAE J1772.
Remote Updates
Software updates via OCPP allow standard compliance to be maintained over the product lifetime without hardware changes. A web interface supports device configuration, log file analysis and PLC tracing.
Backend and Fleet
OCPP 1.6, OCPP 2.0.1 (IEC 63584) and OCPP 2.1 (in development) for charging station management. VDV 261 support for fleet bus preconditioning. MQTT for status information delivery to local displays and monitoring.
How Does vSECC.MCS Fit into the Product Family?
CHARGING STATION CONTROLLER
vSECC
Central controller for AC and DC charging stations and fast chargers. Covers ISO 15118-2, ISO 15118-20, DIN SPEC 70121, CHAdeMO, NACS and OCPP 1.6, OCPP 2.0.1 and OCPP 2.1 (in development). Same hardware platform as vSECC.MCS, enabling fast product variant switching. Base controller for shared-PE depot architectures with vSECC.InPlug.
MEGAWATT CHARGING CONTROLLER
vSECC.MCS
The first market-ready MCS controller. Adds CharIN MCS 3.2 specification, IEC 61851-23-3, ISO 15118-20 Amendment and 10BASE-T1S to the full vSECC capability set. Up to 3.75 MW, 1250 V DC and 3000 A. Supports MCS primary connector plus optional CCS or NACS on the same charging point. Identical hardware and software interfaces to vSECC.
CURRENT SELECTION
SOFTWARE LIBRARY
vSECClib
Software implementation of the vSECC communication stack, including MCS, for integration on your own hardware platform. Covers all major standards including ISO 15118‑2/‑20, ISO 15118-20 MCS Amendment, DIN SPEC 70121, CHAdeMO, NACS, OppCharge and OCPP 2.0.1. Designed for manufacturers who develop their own controller hardware but require a proven, standards‑compliant communication layer.
For compact products, vSECC.single and vSECC.single Board provide the same communication stack in a smaller form factor. For high‑power applications, vSECC.MCS supports megawatt charging standards MCS. Across all products and variants, the same communication software is used, ensuring consistent behavior, simplified integration, and long‑term maintainability.
Protocol and Standards Coverage
| MCS vehicle communication | IEC 61851-23-3 low-level communication (independent from CE and ID signals) and ISO 15118-20 Amendment high-level communication over 10BASE-T1S physical layer. Full SECC-side implementation of the MCS communication sequence. |
| CCS / NACS vehicle communication | ISO 15118-2 (AC and DC, Plug & Charge), ISO 15118-20 (BPT, Plug & Charge), DIN SPEC 70121. Full SECC-side stack including SDP, TLS, V2GTP, EXI encoding and V2G application layer. NACS (SAE J3400) DC supported. |
| Bidirectional charging | DC BPT according to ISO 15118-20. Enables bidirectional charging sessions for both MCS and CCS connectors without additional communication hardware. |
| Backend communication | OCPP 1.6, OCPP 2.0.1 (IEC 63584) and OCPP 2.1 (in development) via Ethernet. Session management, authorization, energy metering, diagnostics, firmware updates and smart charging profiles. Remote software updates via OCPP ensure ongoing standards conformity. Architecture is ready for higher OCPP versions. |
| Vehicle identification | EIM (External Identification Means), RFID, Autocharge and Plug & Charge (ISO 15118-2 and ISO 15118-20 contract certificate-based authentication). Compliant with German Calibration Law for energy metering. |
| IEC 61851 compliance | IEC 61851-1 / -23 for charging station operation and safety. SAE J1772 pilot and proximity signals. IEC 61851-23-3 low-level communication for MCS. |
| Simultaneous charge points | Up to 2 charge points simultaneously. Supports mixed configurations with MCS on one point and CCS or NACS on the other. |
| Safety | Control pilot and proximity pin supervision designed for SIL 2. Emergency line independent of main communication channels. 2 x relay output (normally open) for safety interlocking. |
Vector’s Contribution to MCS Standardization
ISO 15118
PROJECT LEADER
International standard for vehicle-to-grid communication, bidirectional charging and Plug & Charge authentication. Vector contributes to the ISO 15118-20 MCS Amendment working group defining high-level communication for megawatt charging.
IEC 61851
ACTIVE CONTRIBUTOR
Standard for conductive charging systems. IEC 61851-23-3 defines the low-level communication specific to MCS, covering the session sequencing independent of CE and ID signals that is unique to the MCS connector architecture.
CharIN
EXECUTIVE BOARD MEMBER
Charging Interface Initiative: promotes Combined Charging System (CCS) and MCS standards globally, and coordinates interoperability testing across vehicle and infrastructure manufacturers. MCS interoperability is a key focus area.
Industries Electrifying with vSECC.MCS
vSECC.MCS is designed for charging infrastructure manufacturers and Tier-1 suppliers developing MCS and high-power charging stations for heavy commercial and off-highway vehicles. MCS is the charging standard defined specifically for vehicles that require charging power beyond what CCS can deliver.
News and Events
Related Products and Topics
vSECC
Charging station controller for AC and DC charging stations and fast chargers. Same hardware platform as vSECC.MCS. Supports ISO 15118-2, ISO 15118-20, DIN SPEC 70121, CHAdeMO, NACS, OCPP 1.6, OCPP 2.0.1 and OCPP 2.1 and bidirectional V2G. Base controller for extended-cable depot architectures with vSECC.InPlug.
vSECClib
Software library providing the MCS, CCS and NACS communication stack for your own hardware platform. Covers ISO 15118-20 MCS Amendment, IEC 61851-23-3, ISO 15118-2, ISO 15118-20, DIN SPEC 70121, CHAdeMO, NACS, OppCharge and OCPP 1.6, OCPP 2.0.1 and OCPP 2.1 for manufacturers with custom controller designs.
vCTS.performance
vCTS.performance is the HIL test system for conformance and interoperability testing of MCS charging communication at full rated power, scalable up to 3.84 MW. It executes charging communication tests for EV and EVSE. The available high power also enables load and endurance tests.
