Real Time Electricity Tariff Optimizer Kit with ESP32 + Relay
ESP32 Real-Time Electricity Tariff Optimizer Kit — Schedule Deferrable Loads to Lowest Tariff Periods
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
With real-time electricity tariffs varying throughout the day, shifting energy usage to off-peak hours can slash college hostel or lab power bills. This kit gives you a working load scheduler that fetches live tariff data via Wi-Fi, monitors consumption, and controls relays to run heavy loads only when rates are lowest. Perfect for B.Tech capstone projects, hackathons, or personal energy audits.
What You'll Build
You’ll assemble a wall-mountable tariff-aware load controller with an ESP32 brain, a 0.96-inch OLED display, and a four-channel relay switchboard. It continuously pulls the latest utility pricing from a public API, logs your energy usage to a microSD card, and automatically turns deferrable appliances—like water heaters, EV chargers, or battery banks—on only during the cheapest time windows. No cloud dependency after setup; your rules stay on-device.
What You'll Learn
- Interfacing ESP32 with PZEM-004T energy meter for real-time power monitoring
- Using RTC (DS3231) for accurate timekeeping and tariff window scheduling
- Designing a modular relay control system with fail-safe logic
- Building a complete energy management system with data logging and OLED HMI
Kit Contents
| Component | Quantity |
|---|---|
| ESP32 Dev Board | x1 |
| PZEM-004T | x1 |
| DS3231 RTC | x1 |
| 4-ch Relay Module | x1 |
| MicroSD Module | x1 |
| LM2596 Buck Converter | x1 |
| 0.96in OLED | x1 |
| 100nF Caps | x10 |
| PCB Prototype Board | x2 |
| DIN Rail Enclosure | x1 |
| 12V 3A PSU | x1 |
| Soldering Iron | x1 |
| Solder Wire | x1 |
Why Buy This Kit Instead of Sourcing Parts Separately
| Factor | Sourcing Separately | Compoden Kit |
|---|---|---|
| Compatibility checks | You verify every component’s voltage levels, isolation, and ESP32 compatibility | Pre-tested as a complete tariff optimizer system |
| Build support | Scattered tutorials—no dedicated guide for real-time tariff scheduling | AI companion trained on this exact project, with API integration examples |
| Time to first working build | Days of debugging relay timing, API parsing, and RTC sync | Hours, with step-by-step guidance and tested code snippets |
| Shipping coordination | Multiple sellers, separate deliveries, no guarantee of simultaneous arrival | One shipment from Bengaluru in 3-5 days |
Who This Kit Is For
This kit is built for B.Tech ECE/EEE students tackling final-year projects, Smart India Hackathon teams prototyping smart grid solutions, and hobbyists who want to control electricity costs at their hostel or PG accommodation. It’s also ideal for ATL Tinkering Labs and research labs at IITs, NITs, and VIT exploring demand-side energy management.
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 (accessible via QR) walks you through wiring diagrams, code uploads, and API configuration. If that doesn’t help, we’re available on WhatsApp with human support within 24 hours.
Does this kit require a specific electricity tariff API, and is it included?
The included guide helps you connect to open Indian tariff APIs like those from state electricity boards or generic time-of-day rate feeds. The AI companion also provides sample JSON parsing code for common formats.
Can I control more than four appliances?
Yes, the four-channel relay module handles up to four deferrable loads, but the code and hardware design are modular—you can add another relay module on the I²C or GPIO bus. The AI companion can suggest expansion options.
Is soldering required?
Yes, you’ll assemble the PCB prototype board and solder components like the buck converter and capacitors. The kit includes a soldering iron and solder wire, with detailed video walkthroughs from the AI companion to guide you.
ESP32 fetches live tariff prices via API. Schedules deferrable loads to cheapest periods automatically.
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