AC-EDC / AC / OCPP Module Charging Pile Controller Series

AUPINS AC-EDC OCPP Module: Connecting EV Chargers Through W5500 Ethernet

Overview

An EV charging service needs more than a power connection to a vehicle. Operators also need charging status, usage records, fault reports, and a way to manage equipment remotely. OCPP provides a common protocol for exchanging this information between chargers and their management systems.

The AUPINS AC-EDC / AC / OCPP controller series provides this connection as a board-level module for integration into charging equipment. It is relevant to charger manufacturers and system integrators building connected products. Manufacturer product page.

Components

Hardware Component: WIZnet W5500

Provides the module's wired Ethernet interface. AUPINS explicitly identifies W5500 in its product specifications; the Ethernet driver and operating mode are not disclosed.

WIZnet part: W5500 product documentation · Datasheet

About AUPINS

AUPINS Technology Co., Ltd. is an EV charging equipment and components supplier based in Nanjing, Jiangsu, China. Its company materials date the business to 2019. Its catalog includes chargers, charging cables and adapters, sockets, connector pins, wiring harnesses, control boards, operating platforms, energy-storage connectors, and electrical protection products. AUPINS website.

The company also describes an OEM/ODM process covering requirements, design, samples, production, and delivery. Within this wider product range, the OCPP module connects charging equipment to an operating network. OEM/ODM services.

Published Specifications

These are vendor-published specifications. The security and compliance statements have not been independently validated against model-specific certificates or test reports. Specification source.

Where the Module Fits in an EV Charging System

OCPP Connects the Charger to Its Management System

OCPP stands for Open Charge Point Protocol. It defines communication between a charge point and a charging station management system (CSMS). Typical functions include user authorization, charging-session management, meter and status reporting, remote commands, and device management. The functions available in a particular product depend on its implementation. Open Charge Alliance: OCPP.

In a typical service, the charger exchanges authorization and session information with the management system, reports meter readings and status during use, and receives supported remote commands or configuration changes. This describes OCPP's general role; the module's supported messages and hardware integrations should be checked in its firmware and interface documentation.

Power Delivery and Operating Data Follow Different Paths

AUPINS' system overview distinguishes vehicle-side communication, charger-side control, and the OCPP connection to an operating platform. It describes the OCPP module as the charger-to-platform communication unit. AUPINS communication architecture overview.

The electrical path delivering energy to the vehicle is separate from the data path carrying operating information to the server. The module's 12 V supply specification should therefore not be read as a vehicle charging output or a charging-power rating.

WIZnet W5500: Evidence and Role

The Manufacturer Names W5500 Directly

The official product description states:

“WiFi (ESP32), 4G (EC25 or other models), Ethernet (W5500)”

This supports describing the product as a commercial OCPP module with W5500 Ethernet identified by its manufacturer. The evidence comes from the product specification, rather than an inference from a photograph or a library repository. W5500 adoption evidence.

Chip Capabilities and Firmware Use Are Separate Questions

W5500 integrates a 10/100 Ethernet MAC and PHY, an SPI host interface, and hardware TCP/IP functionality. It supports eight hardware sockets and 32 KB of internal buffer memory. These capabilities can be useful when adding wired networking to an embedded product. WIZnet W5500 documentation.

However, using W5500 does not establish how a specific firmware implements its network stack. Espressif's ESP-IDF v5.0.5 documentation, for example, describes a W5500 driver using RAW MAC mode with a software TCP/IP stack. This is an implementation example, not evidence that AUPINS uses that driver. Espressif W5500 configuration.

AUPINS' public materials do not disclose the operating mode. Claims about TCP/IP offload or measured CPU and memory savings therefore require firmware-level evidence.

Choosing Between Ethernet, Wi-Fi, and 4G

At fixed installations with LAN cabling, Ethernet provides a connection that does not depend on Wi-Fi reception or cellular coverage. Wi-Fi and cellular offer other deployment options when local cabling or network access is constrained. The useful comparison is what the site can install and maintain.

Support for multiple connections does not, by itself, establish automatic failover. Network priority, switching behavior, and recovery policies should be confirmed for the supplied firmware.

Applications

The module is relevant wherever charging equipment needs to exchange operating information with a management system:

AUPINS lists commercial, workplace, and fleet charging among its broader solution areas. These are potential application environments, not verified AC-EDC customer installations. AUPINS solutions.

Availability, Pricing, and Contact

The product page uses a request-a-quote sales process. A public unit price, exact minimum order quantity, and lead time were not established from the reviewed materials. Product and quotation page.

Source: AUPINS contact page.

When comparing quotations, clarify firmware licensing, server-integration support, update availability, and whether the modem, antenna, and other accessories are included. Any customization should be agreed for the specific supply configuration. OEM/ODM process.

Market Context and Deployment Evidence

The IEA's Global EV Outlook 2026 reports that the worldwide stock of public charging points exceeded 7 million at the end of 2025, with nearly 1.8 million added during 2025. This describes the broader expansion of charging infrastructure. IEA: Electric vehicle charging.

Those figures cannot be converted into AUPINS module sales or W5500 shipments. The reviewed public materials did not establish AC-EDC cumulative sales, annual shipments, or named customer installations. Market growth and product-specific deployment evidence should be assessed separately.

Vendor Content and Technical Resources

LinkedIn: Connecting Parts to the Procurement Process

AUPINS CONNECT's public posts introduce connector products alongside custom drawings, sample production, delivery planning, and OEM/ODM orders. This gives prospective buyers both a product explanation and a route into development and purchasing. Customization and sampling post.

This is an example of company-wide communication, rather than a verified AC-EDC campaign or evidence of marketing conversion.

Technical Articles: Explaining the System Role

The company's EVCC, SECC, and OCPP architecture article explains how communication components fit between a vehicle, charging equipment, and an operating platform. This system-level context helps buyers understand what kind of module they need. Its broader discussion should not be treated as a feature list for every AC-EDC configuration. Technical architecture article.

What to Check Before Integration

The Open Charge Alliance states that OCPP 1.6 and 2.0.1 are not compatible. Support for both does not remove the need to configure and test the selected version against the intended CSMS. An OCPP support statement should also be distinguished from OCA certification. OCPP versions · OCA certification information.

Related WIZnet Maker Projects

Pazzk's official documentation distinguishes reference hardware and community firmware from separately contracted support, and describes network and recovery policies. These are useful examples of the operational documentation to look for when evaluating connectivity. They do not establish the same behavior in the AUPINS module. Pazzk development board · Network architecture.

What This Example Shows

Connected charging requires the hardware interfaces, OCPP software, and operating policies to work together. A useful module evaluation therefore looks beyond the presence of an Ethernet port to the documentation, firmware behavior, and integration support behind it.

AUPINS AC-EDC illustrates a commercial board-level approach to this problem. From a WIZnet perspective, the key evidence is the manufacturer's explicit identification of W5500 for Ethernet. From an integrator's perspective, the next step is matching the supplied configuration to the charger hardware and intended management system.

FAQ

Sources and Verification Scope

Materials reviewed: October 26, 2026.
WIZnet adoption evidence: the manufacturer's explicit Ethernet (W5500) specification.
Review scope: public documentation. It does not include independent inspection of a shipped unit, firmware analysis, or verification of product-specific sales volumes.