EV Charging Station Power Monitor Kit with Arduino Uno
Build an EV Charging Station Power Monitor with Arduino Uno – Log kWh & Control RFID Access
Every part needed for a real‑time EV charger energy monitor with RFID access control, pre‑tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3‑5 days.
As EV adoption accelerates across India, fleet operators, university campuses, and smart‑city planners need to track exactly how much energy each charging session draws. This kit lets you build a compact, Arduino Uno‑based monitor that measures 230V AC voltage and current, computes real‑time kWh, and logs every session to a microSD card only when an authorised RFID tag is tapped – just like a commercial charging station.
What You'll Build
You'll assemble a full‑featured power monitor for any single‑phase AC charger (up to 20A). The 16×2 LCD continuously shows voltage, current, and cumulative energy consumption. When an RFID card is presented, a new session begins; the logging stops only when the card is removed. Each entry on the SD card gets an exact timestamp from the DS3231 RTC, so you can analyse usage patterns later. The system runs on a 9V battery or USB, making it easy to demonstrate at science fairs, hackathons, or in your B.Tech project lab.
What You'll Learn
- Interface the ZMPT101B voltage sensor and ACS712 current sensor to safely measure 230V AC signals
- Calculate real power, energy (kWh), and cumulative usage in Arduino code
- Implement RFID‑based access control with the MFRC522 module – grant or deny logging start
- Store time‑stamped session records on a microSD card using the DS3231 RTC and a MicroSD module
Kit Contents
| Component | Quantity |
|---|---|
| Arduino Uno R3 | 1 |
| ACS712 20A | 1 |
| ZMPT101B | 1 |
| MFRC522 RFID | 1 |
| DS3231 RTC | 1 |
| MicroSD Module | 1 |
| 16x2 LCD | 1 |
| I2C Backpack | 1 |
| 10kΩ Resistors | 5 |
| 100nF Caps | 10 |
| PCB Prototype Board | 2 |
| 9V Battery Snap | 1 |
| Soldering Iron | 1 |
| Solder Wire | 1 |
Why Buy This Kit Instead of Sourcing Parts Separately
| Factor | Sourcing Separately | Compoden Kit |
|---|---|---|
| Compatibility checks | You verify every part – especially signal conditioning circuits for ZMPT101B and ACS712 | Pre‑tested as a system; all sensor modules and breakout boards work together out of the box |
| Build support | Forums and scattered tutorials; no one source for RFID + energy logging | AI companion trained on this exact project – guides you from wiring to code flash |
| Time to first working build | Days of debugging voltage dividers, I2C conflicts, and SD card libraries | 4‑5 hours, with step‑by‑step guidance and pre‑tuned calibration values |
| Shipping coordination | Multiple sellers, multiple delays, varying component quality | One shipment from Bengaluru in 3‑5 days; all components packed in a single project box |
Who This Kit Is For
Ideal for CBSE Class 11‑12 students crafting a physics project on electrical measuring instruments, B.Tech ECE/EEE sophomores learning embedded energy metering, and Smart India Hackathon teams prototyping EV charging infrastructure. ATL Tinkering Lab mentors will find it a ready‑made demonstration of IoT and access control. Even NIT/VIT/BITS students can use it as a foundation for scalable energy management systems.
Built and Backed by Compoden
Every Compoden kit ships with an AI build companion trained on this exact project — accessible via a QR code on the box, with WhatsApp and email backup. We’ve spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.
What if I get stuck during the build?
The AI companion walks you through every wiring connection, code upload, and calibration step. If you need a human, WhatsApp us – you’ll typically get a response in under 2 hours with photos or short video clips to help you move forward.
Can I safely monitor a real 230V EV charger?
Yes. The ZMPT101B provides galvanic isolation, and the ACS712 is specified for AC current sensing. We include a detailed safety guide: always connect the sensors before powering the charger, never touch exposed terminals while live, and test first with a low‑power load. With those precautions, it’s perfectly safe for educational and demonstration use.
What RFID tags are compatible, and how many are included?
The MFRC522 module works with 13.56 MHz tags – the kit includes two ISO14443‑A cards/ key fobs. You can program additional tags easily, so you can simulate multi‑user access for hackathon demos or college projects.
How do I retrieve the logged session data?
The microSD card stores plain CSV files with columns: session start time, end time, and total kWh. Remove the card, plug it into any computer, and open the file in Excel or Google Sheets – no special software needed.
ACS712 + ZMPT101B measure EV charging power. RFID gates access. LCD logs kWh per session.
What's in this kit
Choose your assembly option:
- Soldering Kit — 25W soldering iron, 60/40 solder wire, flux, and small perfboard for permanent assembly.
- Breadboard Combo — 800-point full-size breadboard with 65-piece jumper wire pack for solderless prototyping.
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Shipping Information
- Prepaid Orders: ₹75 for orders up to ₹999, FREE shipping above ₹999
- COD Orders: ₹125 shipping + ₹50 COD fee = ₹175 total
- Delivery Timeline: Dispatch in 1-2 days, delivery in 2-7 days depending on location
Returns & Warranty
- 7-Day Return: Manufacturing defects only (approval required)
- Warranty: 7 days from delivery
- Non-Returnable: Batteries, consumables, cut wires, clearance items