Hybrid Solar Rain Shingle Energy Test

ISEF Category: Energy: Sustainable Materials and Design

Subcategory: Other  ·  Difficulty: Intermediate  ·  Setup: School Lab  ·  Time: 1 to 2 Months

The Hook

Rain usually feels like a problem for solar panels. This project flips that idea. You build a roof shingle prototype that tries to collect energy from both sunlight and raindrops. Then you compare how much power it makes under sun only, rain only, and mixed weather.

What Is It?

A hybrid solar-TENG shingle combines two ways to harvest energy. The solar part turns light into electricity. The TENG part, which stands for triboelectric nanogenerator, turns repeated contact and separation from raindrops or vibration into electrical charge.

Think of it like a roof that wears two hats. One hat catches sunlight. The other catches motion from rain. Your job is not to prove the device works in a perfect lab. Your job is to test when each part helps, when they interfere with each other, and whether the combined setup gives you more useful energy than one system alone.

This makes a good student project because you can change one weather condition at a time and measure output. You can compare dry sun, wet sun, light rain, and heavier rain. You can also test how roof angle, surface texture, or water flow changes the result.

Why This Is a Good Topic

This topic works well because you can measure real energy output, compare clear conditions, and ask a clean engineering question. It connects to renewable energy and building design, which makes the project easy to explain. You can learn how to plan controls, collect repeatable data, and judge whether a dual-purpose design beats a single-purpose one.

Research Questions

• How does adding a TENG layer change total energy output compared with a solar-only shingle under mixed sun and rain conditions?
• What is the effect of roof angle on the energy yield of a hybrid solar-TENG shingle?
• Does surface texture on the rain-collecting layer change electrical output from simulated rainfall?
• To what extent does intermittent rain reduce solar output, and can the TENG layer offset that loss?
• Which weather pattern, sun only, rain only, or alternating sun and rain, produces the highest net energy per unit area?
• How does water runoff rate affect the electrical signal from the TENG layer?

Basic Materials

• Small solar cell or mini solar panel.
• Simple triboelectric test surface materials such as plastic film, aluminum tape, and foam sheet.
• Multimeter with data logging if available.
• Adjustable tabletop stand or cardboard rig for changing angle.
• LED lamp or other steady light source.
• Spray bottle or watering can for simulating rain.
• Ruler or measuring tape.
• Digital kitchen scale for keeping sample builds similar in mass.
• Notebook or spreadsheet for recording trials.
• Smartphone camera for documenting setup and surface conditions.

Advanced Materials

• Small solar cell or mini solar panel with known electrical specs.
• Triboelectric nanogenerator materials such as PTFE film, copper tape, aluminum foil, and dielectric backing sheets.
• Oscilloscope or high-impedance voltage probe.
• Source meter or electrometer if available.
• Rain simulator nozzle or drip setup with repeatable flow control.
• Pyranometer or light meter for tracking illumination.
• Adjustable mounting frame with angle markings.
• Load resistors for building output curves.
• Data acquisition system.
• Environmental sensor for humidity and temperature.

Software & Tools

• Google Sheets: Organizes trial data, graphs output, and compares conditions.
• Excel: Builds charts and helps calculate averages, variation, and percent change.
• ImageJ: Measures shingle surface area, droplet spread, and runoff coverage from photos.
• Python: Cleans repeated trials and helps plot energy yield over time.
• GeoGebra: Helps you model angle changes and compare geometric setup options.

Experiment Steps

1. Define the one output you will compare first, such as voltage, current, or power per area.
2. Design a fair side-by-side test between solar-only and hybrid versions of the shingle.
3. Choose the weather variables you will change, such as light level, rain pattern, roof angle, or surface texture.
4. Plan controls that keep the frame, sample size, and measurement method the same across trials.
5. Build a repeatable data table so you can convert raw readings into energy yield and percent gain.
6. Decide which graphs and statistics will show whether the hybrid design truly adds value.

Common Pitfalls

• Measuring solar output while the lamp distance changes, which makes one trial look better only because it got more light.
• Letting water pool on the surface, which can block the solar cell and hide the TENG effect.
• Comparing different shingle sizes without normalizing by area, which makes the larger sample seem stronger for the wrong reason.
• Using a multimeter that cannot capture fast TENG pulses, which causes you to miss the real signal.
• Testing only one rain pattern, which makes it hard to tell whether the design works across different weather conditions.

What Makes This Competitive

A stronger version of this project does more than compare two prototypes. It tests a clear hypothesis, uses normalized output values, and includes enough repeated trials to show real trends. You can also raise the level by checking whether the hybrid system still works after wear, angle changes, or different rain patterns. Careful controls and honest energy accounting matter more than flashy parts.

Project Variations

• Test how different roof angles change hybrid energy yield during simulated storms.
• Compare smooth and textured surface layers to see which one boosts rain-driven charge generation.
• Analyze whether the hybrid shingle performs better on cloudy days with intermittent light than a solar-only panel.

Learn More

• NASA Earth Observatory: Look for articles on solar energy, weather, and surface radiation to understand how sunlight changes with cloud cover.
• NOAA National Weather Service: Use weather and precipitation resources to connect your setup to real rain patterns.
• NREL Publications and data: Search for review articles and reports on solar panel performance and weather effects.
• PubMed: Search for review articles on triboelectric nanogenerators and energy harvesting from droplets and vibration.
• MIT OpenCourseWare: Search materials science and energy courses for free background on semiconductors, surfaces, and power conversion.