Industrial 4G & 5G Routers for EV Charge Points

Connected IoT specifies and supplies industrial EV charger routers for UK charge-point operators, installers, system integrators and platform providers. We help match 4G or 5G hardware, SIM resilience, Ethernet capacity and antenna design to OCPP monitoring, payment authorisation and remote maintenance.

EV chargers depend on stable connectivity for availability monitoring, remote diagnostics, software updates and user authentication. Distributed outdoor sites, cabinets and variable RF conditions demand predictable recovery when a mobile link is interrupted.

Which Router Is Right for an EV Charge Point?

When comparing routers for EV charge points, start with the charge-point interface and backend requirements rather than headline speed. For many sites, routine OCPP traffic, status updates, authentication and remote diagnostics can run reliably over 4G. Choose 5G where several devices share the connection, the site carries higher-volume traffic or the project specification requires it.

• Milesight UR32: a compact dual-SIM LTE Cat 4 router with two Ethernet ports for smaller cabinets and one or two local devices
• Milesight UR35: dual-SIM LTE Cat 4 with five Ethernet ports for multi-device cabinets or several charge points sharing a site network
• Milesight UR75: dual-SIM 5G with five Gigabit Ethernet ports where 5G, greater local capacity or shared higher-throughput services are required

Optional PoE outputs on selected router variants are for compatible auxiliary equipment; they do not power the EV charger itself. Connected IoT confirms the exact interfaces, power arrangement and order code before quotation.

Common Challenges in EV Charging Deployments

• Chargers deployed in outdoor cabinets, car parks, roadside locations and basements
• Intermittent signal due to enclosure placement, building attenuation, or poor antenna positioning
• Session drops causing failed authorisation, start/stop errors, or delayed status updates
• Sites with no fixed-line option or long lead times for installation
• Need for secure remote access for support and maintenance
• Single-operator dependency introducing unacceptable uptime risk
• Fleet-scale monitoring and configuration consistency across many locations

Where Industrial Connectivity Helps

• Charger availability monitoring and fault reporting
• Remote diagnostics, configuration and OTA updates
• User authentication and session management
• Payment and backend connectivity (where required)
• Resilience via dual-SIM or multi-operator eSIM and automated failover

Security and Remote Access

EV charging systems must be secured and managed for predictable uptime. Typical capabilities include:

• Encrypted VPN tunnels for secure support access
• Private APN or secure SIM connectivity options
• Centralised monitoring of device health and link metrics (RSSI/RSRP/RSRQ, RTT, packet loss, uptime)
• Remote diagnostics without site visits

Deployment Considerations

• Antenna placement and external antennas for cabinet/underground installs
• Industrial router designed for continuous operation and harsh environments
• Dual-SIM or multi-operator eSIM for resilience and operational control
• Watchdog timers, keepalives and auto-recovery for predictable reconnection
• VLAN/firewall separation if the site shares connectivity with other systems (CCTV, WiFi, access control)
• Integration with charger backend / OCPP management platforms and monitoring

What to Specify Before Choosing an EV Charger Router

• Charge-point make, model and Ethernet interface
• OCPP or other backend platform requirements
• Number of chargers and other devices sharing the connection
• Coverage, preferred networks and dual-SIM resilience requirements
• Cabinet power, temperature, mounting space and enclosure constraints
• Antenna position, cable route and expected radio conditions
• Payment terminal, CCTV or WiFi traffic sharing the site

Network Topology

Chargers connect via Ethernet to a local LAN or directly to an industrial cellular router with external antennas. The router enforces firewall rules and, where relevant, VLAN separation, and terminates persistent VPN tunnels (TLS/IPsec) to the operator’s backend platform or SD-WAN controller. Telemetry, session state and fault events are forwarded to the OCPP/backend management system, while management access is handled on a separate secure plane using certificate-based authentication.

Session Reliability, Failure Handling and Recovery

EV charging reliability depends on predictable session behaviour. Keepalives, rapid re-authentication and health-check driven recovery reduce dropped sessions during transient RF events. Where supported, chargers should buffer critical logs and synchronise once connectivity returns. Automated failover rules based on link quality and availability reduce downtime, while duplicate suppression and consistent timestamps help maintain auditability.

Why Cellular Connectivity Is Used Instead of Fixed Lines

Fixed lines are often unavailable, slow to provision, or controlled by third parties at deployed charging sites. Cellular enables rapid rollout, independent operations, and resilience through operator diversity (dual-SIM or multi-operator eSIM) without requiring additional circuits. While fixed lines can provide higher sustained bandwidth in ideal conditions, modern 4G and 5G networks deliver adequate throughput and latency consistency for charger monitoring, authentication, and management when designed with appropriate recovery behaviour.

Why Connected IoT

• Focused on infrastructure-grade connectivity use cases
• Practical experience with distributed and unattended deployments
• Hardware-first approach with reliable industrial equipment
• UK and Europe focused support

Frequently Asked Questions About EV Charger Routers

Does an EV charge point need 4G or 5G?

For many charge points, stable 4G is sufficient for OCPP messages, authentication, monitoring and remote support. 5G is appropriate where the specification requires it or other higher-volume services share the connection.

Can one cellular router connect several EV charge points?

Yes, provided the local Ethernet design, IP addressing, firewall rules, bandwidth and recovery behaviour are sized for the complete site.

Why use an industrial router for an EV charger?

Industrial routers provide wide-voltage power options, temperature tolerance, watchdog recovery, remote management and, in selected models, dual-SIM failover for unattended sites.

Discuss Your EV Charging Connectivity Requirements

For related deployment guidance, see our IoT connectivity planning, POS and parking connectivity, DeviceHub management and VPN and antenna optimisation pages.

If you operate systems that require stable, secure connectivity, we can help specify the correct industrial router, antenna setup and connectivity approach for your deployment.