If you've ever used a badge to open a door or scan into a gym, you've probably already used RFID — even if you didn’t know it!
In this article, we’ll explain what RFID is, and what kind of cards or tokens you can use to start a charging session with your EV charging station at home.
📡What is RFID?
RFID stands for Radio-Frequency Identification. It’s a wireless technology that lets two devices communicate using radio waves—typically a card, key fob, or tag and a reader (like the one on your charging station).
When you tap your RFID badge or card on the charging station, the system reads the ID of the tag and allows (or blocks) access based on your configuration.
It’s a secure, fast, and convenient way to start and stop charging—especially at home, where you may want to limit access to family members or trusted users only.
🎯Not All RFID Cards Are the Same
RFID technology comes in different types and frequencies, which is important when it comes to compatibility.
Here are the main differences:
| Type | Frequency | Common Use Cases | Compatible with EV charging stations? |
| LF (Low Frequency) | 125 kHz | Older door access systems | ❌ Not typically compatible |
| HF (High Frequency) | 13.56 MHz | Public transport cards, modern badges, most EV RFID tags | ✅ Yes – this is the most common standard |
| UHF (Ultra High Frequency) | 860–960 MHz | Inventory tracking, logistics | ❌ Not used for EV charging |
Most EV chargers, including those from Smappee, use 13.56 MHz High Frequency RFID, following the ISO/IEC 14443 or ISO/IEC 15693 standards.
If you’re buying your own RFID tags or cards, make sure they are 13.56 MHz and NFC-compatible — this is a good sign they will work.
🧾 Can I Use Any RFID Card or Token?
Not quite. Here’s what’s important:
As mentioned above, the charging station supports standard RFID cards and tags (usually using 13.56 MHz, ISO/IEC 14443).
Only compatible cards/tokens that have been authorised manually through the charging station interface or app (like the Smappee Dashboard or mobile app) will be accepted.
Only RFID tags that have a fixed unique ID will be accepted.
That means:
✅ You can use the card that came with your charging station when it is authorised.
✅ You may use other compatible RFID cards, if the system is set to recognize them
❌ Bank cards, contactless payment cards, or badges for other systems will not usually work unless they use compatible RFID tech and are approved in the system
❌ Devices that do not have a fixed unique ID such as a cellphone will not be accepted.
Each RFID tag has a unique ID. Your charger only responds to cards it has been told to trust.
🏠 Why Use RFID at Home?
Even for residential use, RFID provides a lot of benefits:
✅ Control who can charge at your station (ideal for shared driveways or guest parking)
✅ Keep charging sessions separate by user (for tracking or reimbursement)
✅ Avoid unauthorized use of your energy
✅ Link charging sessions to individual drivers or vehicles (great for families or co-owners)
Question | Answer |
What is RFID? | A secure, wireless way to start a charge with a tag or card |
Which frequency is used? | Most EV stations use 13.56 MHz (high frequency) |
Can I use any card? | Only cards using the right RFID standard and added to the system |
Is RFID useful at home? | Yes — for control, tracking, and preventing unauthorized use |