RFID

Definition: What is RFID?

Radio-Frequency Identification (RFID) is a wireless, contactless technology that identifies, tracks, and communicates information from a microchip embedded in a transponder to a special reader. It is Radio-Frequency Identification, in which data is transmitted seamlessly without exposure to radio frequency or direct contact. It's a fundamental backbone for contemporary access control, electronic toll collection (ETC), and secure electric vehicle charging authentication.

To grasp RFID, it's useful to consider it as an evolution of the old barcode, but with a twist of non-optical technology. Unlike barcodes that need precise physical alignment and line-of-sight visual scanning, RFID systems are able to capture data without the need to penetrate paper, plastic, or extreme ambient dust or moisture.

Technically, there are two main modes of physical coupling that are used to provide the operation of an RFID: inductive coupling and electromagnetic backscatter coupling. Inductive coupling is used in networks with a short range (near field) where the magnetic field of the reader's antenna is coupled directly to the tag's antenna. For longer-range (far-field) networks, the tag receives the radio frequency wave and changes the impedance of its antenna to return a new signal to the reader.

These interactions operate across globally regulated radio frequency bands. When an authorized card or transponder enters the active interrogation zone, a secure handshake occurs. In the e-mobility landscape, this wireless connection triggers a rapid RFID login process. The charger reads the tag's stored credentials, validates the identifier via local or cloud-based directories, and authorizes power distribution to the vehicle.

How It Works: Deconstructing System Components

An operational RFID ecosystem relies on four fundamental components that operate in a continuous, automated sequence:

RFID Authentication Flow in EV Charging

RFID Reader

Interrogator installed inside the EV charger to read user access cards.

Radio Waves

RFID Tag

User card or token with embedded IC and antenna for authentication.

Ethernet / 4G / Wi-Fi communication via OCPP
Secure session authorization

Middleware & Cloud

ChargeX / RMS validates the RFID identity and enables billing, access control, and monitoring.

RFID Tag (Transponder): It is a part that includes integrated circuit (IC) microchip for storing data and an antenna to generate signals. They are used in commercial applications in rugged key fobs, PVC smart cards or windshield stickers.
RFID Reader (Interrogator): This includes a transmitter/receiver module that sends radio frequency signals, receives the return data payload, and decodes the stored transponder parameters.
RFID Antenna: This element establishes the physical read zone by radiating electromagnetic energy generated by the reader and capturing the returning signals reflected from nearby tags.
Middleware and Backend Software: This layer receives raw data from the reader, filters out duplicate tag reads, and routes the validated credentials to core management systems—such as Exicom’s ChargeX platform or Harmony Connect Remote Monitoring System (RMS)—to complete billing and session management.

Types and Variants: Passive HF vs. Passive UHF RFID

Selecting the correct frequency class is critical for optimizing system performance, reading range, and security parameters across different commercial deployments.

Feature	Passive High-Frequency (HF)	Passive Ultra-High-Frequency (UHF)
Operating Frequency	13.56 MHz	860–960 MHz, typically 865–867 MHz in India
Typical Read Range	2 to 10 cm	Up to 10 to 15 meters
Standard Protocols	ISO/IEC 14443A/B, ISO/IEC 15693	ISO/IEC 18000-6C, EPCglobal Class 1 Gen 2
Security Support	Advanced AES-128 cryptographic encryption	Basic access passwords and tamper-evident disablement
Environmental Sensitivity	Low sensitivity to water and nearby metal	High susceptibility to metallic reflection and liquid absorption
Tag Cost (India)	₹15 to ₹120 per smart card or tag	₹5 to ₹50 per paper label or windshield sticker

RFID examples and use cases

An analysis of the current commercial settings shows that it is imperative to develop an RFID tag that is fundamental to the implementation of automated working and secure logistics networks.

Consumers: The dominant consumer-facing RFID use case centers on contactless transactions. Smart home chargers, such as the Exicom Spin Air, utilize integrated high-frequency readers. This allows residents to tap their key fob or access card to immediately initiate an AC charging cycle, avoiding the delays of using a mobile app in parking structures with poor cellular connectivity.
Businesses: Enterprises use RFID technology for access control and IT asset management. High security cards enable businesses to manage access to high-security data centers, to secure hazardous zones, and to track the precise location of high-value physical resources in real time.
Fleets and Infrastructure Players: In commercial logistics, passive UHF windshield identification is used. At the depot, when a truck arrives, a reader mounted overhead provides automatic class identification, which unlocks the gates and synchronizes with software to distribute the power to a truck and its class in a balanced way, using a modular charger such as the Exicom Harmony Direct 2.0.

Data and Metrics: The Operational Advantage

Deploying automated wireless identification systems delivers measurable efficiency and accuracy improvements compared to manual or optical tracking methods.

Performance Indicator	Manual Entry / Clipboard	Optical Barcode Scanning	Automated RFID Deployment
Data Collection Speed	Very Low (~30 seconds per item)	Low (~2 to 3 seconds per item)	Very High (100s of tags per second)
Line-of-Sight Dependency	Yes (Physical inspection)	Yes (Direct visibility required)	No (Omnidirectional radio reading)
Operational Accuracy	85% to 90% (Prone to human error)	95% to 98% (Affected by label damage)	> 99.5% (Eliminates visual dependency)
Labor Requirement	High manual intervention	High manual sorting and scanning	Fully automated at control gates
TCO over 36 Months	Increases linearly with scale	Moderate ongoing costs	High initial ROI payback in 12–18 months

According to the big-box trials, the amount of time you spend on physical inventory audits can be cut by up to 80% once you switch to RFID systems, which can be recorded in real-time rather than be performed over a period of days.

India Context: Market Adopting and Policy & Costs

RFID technology has moved from niche applications in Indian warehouses to being a mandated infrastructure.

The Breakdown of costs (₹) of a standard high-frequency card used across various public vehicle charging networks (e.g., Tata Power EZ Charge, Zeon, or GOEC) is between ₹300 and ₹370. In terms of equipment, entry-level security access readers are around ₹2,000 each, and industrial-grade long-range fixed UHF tolling antennas are ₹25,000 to ₹1,50,000 per unit.

The Government Policy: The Government of India has announced the adoption of Passive UHF RFID tags on all motor vehicles under the national FASTag programme under the National Electronic Toll Collection (NETC) policy. This policy standardized the 865–867 MHz frequency band, significantly lowering hardware procurement costs across the region.

Market Adoption: National charging equipment is being regulated by the Bureau of Indian Standards (BIS) with the IS 17017 series for interoperability and safety. Public charging stations are increasing beyond 26,000 stations in operation, and operators are using high-frequency RFID cards to enable payment to proceed effortlessly and offline.

Business and Industry Applications

Enterprise Integration Backend

Fleet Operators

High-Throughput Operations

Dynamic load sharing
Automated vehicle logs
Power theft prevention

Charge Point Operators

Public CPO Networks

Offline auth whitelist
Multi-network roaming
Fast tap-and-charge

Enterprises

Corporate Charging Hubs

Facility access control
Consolidated ESG data
Employee billing portal

Fleet Operators

When you use the UHF RFID tags, fleet depots can automatically check in vehicles, unlock secure terminal gates, and monitor vehicle energy consumption. This information can be used to dynamically balance load to prioritize charging the highest priority vehicles first while charging lower priority vehicles at off-peak periods to avoid high costs from grid demand charges.

Charge Point Operators (CPOs)

For CPOs, minimizing session failures is critical to maintaining site loyalty and maximizing infrastructure ROI. Basement parking structures and remote highway corridors often suffer from poor cellular coverage, causing mobile application logins to fail. Standardizing RFID card authentication allows CPOs to offer a reliable backup. Chargers can store encrypted whitelists locally, verifying the user's secure credentials and starting the charging session even when the station is offline.

Enterprises

Corporate RFID readers are used by enterprises to merge access to their facilities and the services provided to the employees. The integration enables workers to use their corporate security badges to open parking gates, enter offices, and turn on EV chargers. The enterprise backend records these transactions, simplifying billing management and providing detailed energy reports for corporate ESG audits.

Challenges and Solutions: Engineering a Secure Network

To ensure reliability at scale, infrastructure operators must address several common physical and digital challenges.

Problem	Technical Solution	Pros	Cons
RF Signal Absorption Metal body panels and liquid-cooled batteries absorb or block radio waves, causing scanning drops.	Install anti-metal UHF tags using specialized ceramic or thick ferrite isolation layers.	Restores transmission quality and read distance on heavy-duty vehicles and metallic structures.	Increases individual tag thickness and raises physical tag production costs.
Card Duplication & Cloning Legacy card architectures such as MIFARE Classic use outdated Crypto1 keys, making them vulnerable to pocket-sized cloning tools.	Migrate to MIFARE DESFire EV3 chips with AES-128 cryptographic hardware encryption.	Enables anti-cloning security through dynamic challenge-response authentication.	Costs more than basic, unencrypted RFID cards.
Interoperability Failures Drivers must carry multiple cards for different charging networks, increasing user friction.	Adopt open eRoaming protocols such as OCPI integrated with clearinghouses like Hubject or Gireve.	Allows users to access multiple networks with one card while simplifying billing settlement.	Requires continuous software maintenance and complex API integration between operators.

Final Thought: Strategic Grid and Infrastructure Integration

As the world moves to electric cars, the security of the grid is becoming a critical need, and digital authentication is moving from being just a nice-to-have to a must-have. To prevent unauthorized energy theft, secure and speedy verification is essential to protect charging stations from this harm, as well as the power grid during a peak hour.

At Exicom, this focus on reliability is central to our hardware and software design. Our AC Spin Air charger series and high-power DC Harmony terminals feature integrated, weather-resistant RFID readers compliant with standard industrial security protocols. Exicom's physical security strength and digital authentication capabilities with offline security support ensure energy infrastructure operators can enjoy superior uptime and expand their networks with confidence into the future.

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Frequently Asked Questions

So what exactly is RFID and how is it being used?

Radio-Frequency Identification (RFID) is a wireless technology that uses electromagnetic waves to identify, track and transfer information between a transponder and a specialized reader. It is used widely in securing corporate access, automated retail stock management, highway toll collection (FASTag) and driver authorization at public and private EV charging terminals.

What RFID is used?

High-Frequency (HF) passive RFID cards and key fobs with frequencies of 13.56 MHz are used in the EV charging industry. MIFARE DESFire EV3 chips with AES-128 cryptographic hardware encryption are used by leading charging networks to avoid card cloning and unauthorized usage.

Which one is better NFC or RFID?

In industrial applications where long range RFID reads are needed and where multiple tags are scanned quickly without line of sight, RFID outperforms the more traditional technology. NFC (a restricted portion of HF RFID with a range of just 4 cm) is more applicable to proximity transactions that take place deliberately, one-to-one and are highly secure, such as chips featuring AES-128 cryptographic hardware encryption to prevent card cloning and unauthorized transactions.

Is Fastag a RFID?

Yes, FASTag is a specialized deployment of passive Ultra-High Frequency (UHF) RFID technology in India. Mounted on vehicle windshields and operating on the 865–867 MHz frequency band, the tag reflects its unique Electronic Product Code (EPC) to overhead plaza antennas, allowing toll payments to be deducted while the vehicle remains in motion.