Solar Panel Voltage Monitor Kit with Arduino Uno — Measure Solar Output & Charge State on an I2C LCD

Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.

Your solar panel is generating power — but how much? This kit turns the panel itself into a live voltage display that you build from scratch. Using a simple voltage divider, the Arduino reads the panel’s output and shows real-time voltage and a charge-state estimate on a bright 16x2 LCD. No prior electronics experience needed, just curiosity about solar energy.

What You'll Build

On a 400-point breadboard, you’ll wire the 6V 2W solar panel to a voltage divider made from the included resistors. The divider steps the 0–6V panel output down to 0–5V so the Arduino Uno can read it safely on an analog pin. An I2C backpack makes the LCD easy to connect with only four wires. Once programmed, the display shows the panel’s live voltage (e.g., “5.42 V”) and a simple label like “CHARGING” or “FULL” based on preset thresholds. Everything plugs together — no soldering.

What You'll Learn

• Wire a voltage divider and calculate resistor ratios to safely measure higher voltages with Arduino
• Read analog values from a solar panel using Arduino’s ADC and convert counts to actual voltage
• Drive a 16x2 LCD through an I2C backpack — minimal wiring, clean data display
• Estimate solar panel charge state for 6V lead-acid/Li-ion batteries based on voltage thresholds

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

Young makers aged 10–15 exploring renewable energy for CBSE science exhibitions or ATL Tinkering Lab projects. It’s a first Arduino build that produces an instantly useful tool — no prior coding required. B.Tech ECE/EEE students can use it as a mini-project to demonstrate IoT or energy monitoring concepts, while hobbyists get a quick, reliable solar voltmeter.

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.