ESP32 Controller to Shift Loads to Cheapest Tariffs Kit
Build an ESP32 Controller to Shift Loads to Cheapest Tariffs
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Take charge of your electricity bill with a device that watches both solar generation and household consumption, then shifts heavy loads to the cheapest time slots. You'll code an ESP32 brain that reads dual PZEM-004T sensors, syncs with a real-time clock, and drives a relay module to automate EV charging and water heating. This is a real-world grid-edge intelligence system you can install inside a DIN rail enclosure.
What You'll Build
You'll assemble and program a controller that monitors grid and solar power simultaneously using two PZEM-004T modules and two INA219 sensors. An OLED display shows live energy data while a MicroSD card logs every reading. The DS3231 RTC keeps time accurate to the second, so your algorithms can compare current tariff slabs and decide when to activate the 4-channel relay-moving your EV charger or geyser to off-peak windows automatically.
What You'll Learn
- Dual-channel energy monitoring using PZEM-004T modules and INA219 sensors
- Implementing time-of-use tariff logic on ESP32 with RTC synchronization
- Relay control for appliance load shifting based on algorithmic decisions
- Data logging to MicroSD and real-time display on OLED for energy analytics
Kit Contents
| Component | Quantity |
|---|---|
| ESP32 Dev Board | 1 |
| PZEM-004T | 2 |
| INA219 | 2 |
| DS3231 RTC | 1 |
| MicroSD Module | 1 |
| 4-ch Relay Module | 1 |
| LM2596 Buck Converter | 1 |
| 0.96in OLED | 1 |
| 100nF Caps | 10 |
| PCB Prototype Board | 3 |
| DIN Rail Enclosure | 1 |
| 12V 3A PSU | 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 | Pre-tested as a system |
| Build support | Forums and scattered tutorials | AI companion trained on this exact project |
| Time to first working build | Days of debugging | Hours, with step-by-step guidance |
| Shipping coordination | Multiple sellers, multiple delays | One shipment from Bengaluru in 3-5 days |
Who This Kit Is For
B.Tech ECE and EEE final-year students prototyping demand-side management for Indian time-of-day tariffs will find a complete research platform here. Participants in Smart India Hackathon and ATL Tinkering Labs can rapidly demonstrate grid-edge load shifting. Hobbyists from IIT/NIT/VIT/BITS working on home energy management systems will also appreciate the pre-tested sensor integration and ready-to-adapt algorithm code.
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?
Your kit includes a QR code to an AI companion trained on this exact project. You can also reach us on WhatsApp for human assistance within 12 hours.
Can this controller work with Indian time-of-day tariffs?
Yes. The DS3231 RTC keeps accurate time, and the ESP32 can be programmed with the latest tariff slabs from your electricity board (e.g., peak, off-peak, normal). We provide example code for Indian ToD structures.
What if I want to add more loads like a second EV charger?
The 4-channel relay module leaves room for expansion. The ESP32 has enough GPIOs to handle additional sensors and relays; you can scale the system using the included prototype boards.
Do I need prior experience with ESP32?
This is an advanced kit. You should be comfortable with Arduino IDE, I2C communication, and soldering. If you're new to ESP32, we recommend starting with our beginner kits, but our AI companion will guide you through each step.
ESP32 monitors load and PV simultaneously. Algorithms shift EV charging and hot water to cheapest tariff windows.
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.
Other projects you can build
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