What's the Best EV Charger Networking Solution? It Depends

Editor’s note: This post was updated in 2026 to better reflect current EV infrastructure and connectivity trends.

EV charging stations live or die by connectivity — but the best way to connect chargers isn’t universal.

Reliable internet access keeps smart chargers online, payments flowing, and issues resolved (or non-existent) before drivers notice. So what’s the right networking solution? That depends on scale, location, uptime requirements, and how an EV charging station is managed.

As EV infrastructure expands, so do operational concerns. Every moment of downtime, failed payments, and maintenance issues impact station owners’ bottom line.

A solid networking solution resolves all of these issues.

Prepping for EV Charger Deployment

What are the main considerations before deploying EV chargers?

First, commercial charging stations need reliable internet coverage for both the chargers and the integrated POS systems. At minimum, they must consider factors like location, reliability, security, and expense to build the best solution for their customers.

Take the first factor: location. Areas like parking garages, rural areas, or dense urban environments may have poor network coverage, making stable connectivity a challenge. There’s also a need to balance reliability with cost. In some instances, Ethernet connectivity is the way to go, but it’s not always right for every situation. For an integrated POS system, secure connectivity is non-negotiable to protect payment data and comply with PCI standards. However, this doesn’t mean an integrated POS system always needs Ethernet; in some instances, cellular solutions with private networking and VPN can be the right solution.

Before choosing the right networking option, solution providers and operators should perform their due diligence to ensure both chargers and POS systems operate seamlessly and securely in any environment. Choosing the right networking layout is an important part of this process.

Networking Layouts for EV Chargers

A network topology, or layout, dictates how charging devices are arranged and connected — and how data flows between them. Examples include Ethernet (bus, star, ring, and mesh), Wi-Fi, and cellular; each with unique layouts and data paths.

As an overview, here are four of the most popular networking layouts for EV charging — namely; star, bus, Wi-Fi, and cellular.

Ethernet - Star Layout

In an Ethernet star setup, each EV charger is connected directly via cable to a central hub or router. This setup is straightforward and reliable because if one charger has a problem, it won’t affect others. It’s ideal for smaller charging networks, like at a single location with multiple chargers.

Pros: Reliable and scalable; also easy to install and troubleshoot
Cons: Expensive; requires the most cabling; network performance/failure is at the switch

Ethernet - Bus Layout

An Ethernet bus layout is a wired network configuration in which all devices are connected to a single central cable, called a “bus.” Data travels along the bus, and each device listens for messages addressed to it.

Pros: Simple to install, cost effective, reliable, and good for small networks
Cons: Difficult to troubleshoot, slower data transmission, possible single point of failure at bus

Wi-Fi Layout

Devices connect wirelessly to a central Wi-Fi router or access point. A Wi-Fi layout may also connect to one central hub (star) or to multiple hubs (mesh) for better coverage.

Pros: Lowest cost of all network types, easy implementation and expansion
Cons: Strong Wi-Fi signal needed at the node, single-point of failure at Wi-Fi router, may need APN or VPN

Cellular Layout

Like a Wi-Fi layout, a cellular layout is wireless. Each node connects via a cellular base tower or station, which feeds off signals from a larger network (just as cell phones do).

Pros: Simple to deploy and expand, offers redundancy if adjacent to multiple cell towers
Cons: Recurring cellular service costs, needs stronger signal at the node and possible additional antennas

INDUSTRY CONTEXT:

Many EV charging stations now rely on cellular IoT connectivity for real-time monitoring, remote diagnostics, and uptime assurance across widely distributed locations — especially where wired connections aren’t practical or consistent.

EV Charger Best Practices for Cellular Connectivity

Considering a cellular or Wi-Fi layout for your smart chargers? At OptConnect, our cellular experts regularly advise solution providers about deploying network connectivity for EV chargers. Here are a few of the best practices we recommend to ensure reliable, secure, and cost-efficient cellular connection.

Coverage Assessment and Signal Enhancement

First, perform site surveys wherever you plan to deploy your EV charging stations. While it’s possible to assume good network strength in certain areas, a site survey can do more. So, before deployment:

Analyze available cellular networks by carrier
Check RSRP in various locations near your intended EV chargers
Perform a speed test to determine data throughput
Locate possible obstructions (metal objects, walls, etc.) that may alter or otherwise interfere with the signal

Second, ask a cellular expert about which antenna is best for your layout and hardware, paying special attention to optimal placement that will enhance your signal. These two tasks can help protect your connection from the get-go.

Data Optimization

Cellular connectivity is a great networking option for EV charging stations — but to avoid overages, it’s important to choose the right plan and minimize unnecessary data usage. Here’s how.

Set Reporting Intervals: Configure chargers to send data (like usage stats) at fixed intervals instead of continuously. For example, sending updates every hour instead of every minute can significantly reduce data usage.
Prioritize Critical Data: Limit real-time data transmission to essential information, like payment processing and system alerts, while batching non-critical updates (e.g., performance logs).
Monitor Data Usage: Use a monitoring platform like OptConnect Summit to track how much cellular data each charger consumes. Adjust settings if certain chargers are using more data than expected.
Choose the Right Plan: Opt for a data plan tailored to the expected usage per charger. Bulk or pooled data plans are ideal for networks with multiple chargers, allowing unused data from one charger to cover another.
Compress Data: Enable data compression features where possible to reduce the size of transmitted files.

By implementing these strategies, you can keep costs predictable and avoid unexpected overage fees.

Need additional help? Talk to an OptConnect cellular specialist.

Built-in Redundancy

While it’s tempting to save on hardware costs for a large deployment, keep in mind that it can be worth the extra cost to purchase dual-SIM routers that fail over automatically if one carrier goes down. A network outage is not the time to find out that a fleet of chargers is down. Redundancy is the best safeguard for situations like these.

Remember, it’s not if a carrier outage happens, but when. Carefully consider all the features of your equipment before you buy. Feeling overwhelmed by your choices? Ask a cellular IoT specialist to recommend the best multi-SIM option for your particular deployment needs.

Private Network and VPN for Improved Security

Whether you decide on a Wi-Fi layout, a Wi-Fi to cellular layout, or a cellular layout – taking extra security measures is critical to protect POS data and the connection itself.

At OptConnect, we create private networks and secure VPN tunneling for customers that need an extra layer of security for their critical equipment. And because every situation is unique, our engineers can work with customers on a customized solution when required. Because a secure network means uninterrupted revenue as well as uninterrupted service.

Fully Managed Connectivity

Have a large portfolio of connected EV chargers?

If the answer is “yes,” you may need a managed service provider to monitor cellular connectivity, inform you about data usage, signal strength, and potential network anomalies. A cellular MSP saves time by provisioning and configuring cellular devices for you. You never need to contact individual carriers like Verizon or AT&T because the cellular MSP has established relationships with all major carriers. When you order a router or additional antennas, an MSP like OptConnect includes all peripherals in your kitting. Shipping is fast (often as fast as overnight) and each device includes a lifetime subscription to a management portal that gives you real-time information on all of your devices. These are just a few of many benefits from an MSP.

If you’re not an IoT engineer, a fully managed plan just may save your life — along with the life of your connected devices.

Find out if a fully managed cellular solution is right for you.

From design to deployment, we're with you every step of the way.

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