A 13-year-old student from Massachusetts has developed an innovative solar-tracking system that could offer a low-cost way to improve solar panel performance. Jason Chang, a seventh-grade student at Worcester Academy, designed a device costing less than $25 that reportedly generated around 20% more electricity than a conventional fixed solar panel during outdoor testing.
What makes the invention particularly interesting is that it does not rely on electric motors or an external electrical supply to move the panel. Instead, it uses gravity, water-filled containers, magnets, pulleys and a seesaw-style wooden structure to adjust the panel’s position as the Sun moves across the sky.
Chang’s project began with a simple household problem: repeatedly repositioning solar-powered Christmas decorations to ensure they received enough sunlight. Rather than continuing to move the decorations manually, he started exploring whether a solar panel could change its own position throughout the day.
His work demonstrates how a practical problem can lead to an engineering experiment with wider applications. It also highlights the role young innovators can play in exploring affordable approaches to renewable energy.
Key Highlights of Jason Chang’s Solar Tracker
- Inventor: Jason Chang, a 13-year-old student from Massachusetts, United States.
- School: Worcester Academy.
- Reported cost: Less than $25.
- Reported performance: Around 20% more electricity than a conventional fixed panel during outdoor testing.
- Main mechanism: Gravity, water containers, magnets and pulleys.
- External electricity required for tracking: None, according to reports about the prototype.
- Inspiration: A problem involving the positioning of solar-powered Christmas decorations.
- Recognition: Chang was named a National STEM Champion and selected to present his invention in Washington, D.C.
Who Is Jason Chang?
Jason Chang is a young inventor and seventh-grade student at Worcester Academy in Massachusetts. He attracted attention for developing a solar-tracking mechanism designed to improve how a solar panel receives sunlight without relying on a motorised system.
His project combines mechanical engineering principles with an everyday energy problem. Instead of using sensors, electronic controllers and motors to move the panel, Chang explored how changes in weight could produce the required movement.
The project also earned him recognition as a National STEM Champion in 2026. According to reporting by the Worcester Telegram & Gazette, Chang was among 55 students selected nationally for the recognition, with two students from Central Massachusetts included in the group.
His achievement highlights how school-level science, technology, engineering and mathematics projects can encourage students to investigate practical challenges and develop working prototypes.
How Did the Idea for the Solar Tracker Begin?
Chang’s invention reportedly began with his family’s solar-powered Christmas decorations.
His mother frequently asked him to reposition the outdoor decorations so their small solar panels would receive direct sunlight. The repeated task led him to consider whether the panels could adjust their own position automatically.
Rather than building a conventional motorised tracker, Chang explored a different question: could gravity and a carefully controlled change in weight move the panel without requiring electrical power?
He developed a mechanism that uses containers of water to gradually change the balance of a seesaw-like support. As the weight changes, the panel tilts to follow the Sun’s changing position.
The approach turns a simple physical principle into a functional tracking system. It also avoids the need for an electric motor to perform the panel’s movement.
How Does Jason Chang’s Solar Tracker Work?
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The system uses a mechanical arrangement to change the angle of a small solar panel over the course of the day. Its main components include a wooden support, magnets, pulleys, water containers and a small bucket connected to the mechanism.
Here’s how the reported design works.
1. A seesaw-style support holds the solar panel
The panel sits on a wooden support that can tilt. Magnets help weigh down one end, establishing an initial balance that positions the panel towards the eastern morning Sun.
This arrangement allows the panel to change its angle without a conventional motor.
2. Water containers control the timing
Three containers are labelled for morning, midday and afternoon. Thin plastic tubes connect these containers to a small bucket attached to the rear of the panel.
Each container releases water at a different stage of the day.
According to reporting on the project, the morning container begins dripping at approximately 8 a.m. When it empties, a pulley arrangement triggers the midday container. The afternoon container is activated later.
These timings were part of the reported prototype’s design; they should not be assumed to work identically at every location or during every season.
3. Increasing weight changes the panel’s balance
As water enters the bucket, the bucket becomes heavier. The changing weight alters the balance between the bucket and the magnets.
This causes the panel to tilt gradually, helping it remain better aligned with the Sun as the day progresses.
4. Gravity provides the movement
The mechanism uses gravity and changing water weight to create movement. Unlike a conventional motorised tracker, it does not need an external electrical supply to power the tracking action.
The panel itself still converts sunlight into electricity in the normal way. The innovation is the method used to reposition it.
5. Water can be reused
Reports on the invention indicate that the water can be recycled rather than discarded. Reusing the water could help keep the mechanism economical, although a practical installation would still need to manage evaporation, leakage and maintenance.
The design shows how mechanical engineering can provide an alternative to electronic control systems for certain small-scale applications.
How Much Does the Solar Tracker Cost?
One of the most notable features of Chang’s invention is its reported cost of less than $25.
Conventional motorised solar trackers can require motors, sensors, controllers, wiring and additional mounting components. Those parts can increase the initial cost and create extra maintenance requirements.
Chang’s prototype instead uses relatively simple materials, including wood, magnets, pulleys, containers and tubing.
The low reported cost makes the project interesting for educational demonstrations and experiments involving small solar panels.
However, the figure should be understood as the reported cost of the prototype, not the confirmed price of a commercially available product. A full installation would need to account for panel size, structural strength, weather resistance, installation labour and long-term durability.
A design that is inexpensive to build as a school project may require additional engineering before it can be used reliably outdoors over many years.
Did the Solar Tracker Increase Electricity Output by 20%?
Reports on Chang’s project state that the prototype generated approximately 20% more electricity than a conventional fixed solar panel during outdoor testing.
The underlying idea is straightforward: solar panels generally capture more energy when sunlight strikes their surface at a favourable angle. As the Sun moves across the sky, a fixed panel’s orientation becomes less favourable at different times of day.
A solar tracker changes the panel’s position to maintain better alignment with incoming sunlight.
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The reported improvement is encouraging, but the exact result depends on how the system is tested.
Important factors include:
- Weather conditions: Cloud cover and changing sunlight can influence measured output.
- Panel orientation: The starting angle of the fixed panel affects the comparison.
- Location and season: The Sun’s path changes with latitude and time of year.
- Tracking accuracy: The mechanism must move the panel at suitable times.
- Measurement method: A reliable comparison needs consistent measurements of energy generated over the same period.
The reported 20% improvement is therefore a result from the prototype’s testing, not a guarantee that every solar installation using a similar mechanism would produce the same gain.
Further testing would be needed to establish its performance across different climates, panel sizes and operating conditions.
How Is This Different From Conventional Solar Trackers?
Most active solar trackers use motors and a control system to move solar panels as the Sun changes position. Depending on the design, they may use light sensors, electronic controllers or calculated solar-position data.
Chang’s prototype follows a passive mechanical approach. It relies on gravity and timed water release to change the panel’s balance.
| Feature | Chang’s reported prototype | Conventional motorised tracker |
|---|---|---|
| Tracking movement | Gravity and changing water weight | Electric motors |
| External electricity for movement | Not required by the reported mechanism | Usually required |
| Main components | Wood, magnets, pulleys, containers and tubing | Motors, controls, sensors or position systems |
| Reported prototype cost | Under $25 | Varies considerably by system |
| Tracking control | Water release and mechanical balance | Electronic or programmed control, depending on design |
| Commercial readiness | Prototype requiring further evaluation | Available in a range of established designs |
This comparison does not mean a passive tracker will always outperform an active one. Motorised systems can provide precise and continuous adjustment, while a timed water mechanism may be less accurate under changing weather or different seasonal conditions.
The main attraction of Chang’s design is its potential simplicity and low cost.
Could This Invention Help Rural and Off-Grid Communities?
Affordable solar technology is particularly relevant to households, farms and communities where electricity access is limited or where the cost of installing and maintaining equipment is a major concern.
A passive solar tracker could be useful in some small-scale applications if it proves reliable and practical outside controlled demonstrations.
Lower tracking energy requirements
Because the reported mechanism does not need an electric motor, it avoids the electricity consumption associated with powering a motorised tracking system.
The panel still generates electricity as usual, but the movement mechanism relies on gravity and water.
Potentially lower component costs
Wooden supports, containers, pulleys and magnets may be relatively inexpensive and easy to source. That could make the design attractive for educational projects or experimental off-grid applications.
Educational opportunities
The project combines physics, renewable energy and mechanical design in a tangible way. Students can investigate balance, gravity, sunlight angles and energy generation through practical experiments.
Important limitations
Before the system could be recommended for widespread use, it would need to demonstrate dependable operation under real outdoor conditions.
Wind, rain, temperature changes, corrosion, water loss and mechanical wear could all affect performance. The support structure would also need to withstand the forces acting on the panel.
The reported prototype is an example of a promising engineering idea, not yet proof of a ready-to-deploy solution for every off-grid household.
Why Solar Tracking Matters for Renewable Energy
Solar panels convert sunlight into electrical energy, but the amount captured depends partly on how sunlight reaches the panel.
A fixed panel has a set orientation. Although it can be positioned to receive sunlight effectively over a typical day or season, the Sun’s apparent position changes continuously.
A tracking system attempts to improve alignment by moving the panel.
The benefits depend on the system and location. Tracking may increase energy generation, but the additional output must be weighed against installation costs, maintenance and the reliability of moving parts.
For a small panel, a low-cost passive tracker may be worth exploring. For a large solar installation, engineers must consider structural loads, land requirements, maintenance and the overall economics of the system.
Chang’s project illustrates how the same general goal can be approached through a different engineering design.
What Makes Jason Chang’s Project Important for Young Innovators?
Chang’s invention offers a useful example of how innovation can begin with an everyday inconvenience rather than an expensive laboratory or a complicated piece of equipment.
His approach involved identifying a problem, investigating a possible solution and testing a physical mechanism. It also brought together several STEM concepts, including mechanical balance, gravity, energy conversion and experimental measurement.
The reported recognition as a National STEM Champion gives the project wider visibility and creates an opportunity for other students to explore engineering and renewable energy.
For young inventors, one important lesson is that an idea should be tested against measurable results. A working prototype is a valuable first step, but repeatable experiments and careful evaluation are necessary before a design can be considered reliable.
Chang’s solar tracker demonstrates the value of this process: start with a real problem, develop a simple mechanism and use testing to determine whether it works as intended.
Frequently Asked Questions (FAQs)
1. Who is Jason Chang?
Jason Chang is a 13-year-old student at Worcester Academy in Massachusetts who developed a low-cost solar-tracking system using gravity and water.
2. How much did Jason Chang’s solar tracker cost?
The prototype was reported to cost less than $25. This is the reported cost of the project, not a confirmed retail price for a commercial product.
3. How much more electricity did the solar tracker generate?
Reports state that it generated approximately 20% more electricity than a conventional fixed solar panel during outdoor testing. The result may vary with weather, location, panel orientation and testing conditions.
4. Does the solar tracker use electric motors?
No. The reported design uses gravity, water-filled containers, magnets and pulleys to change the panel’s position without a motor powering the movement.
5. How does water help the panel follow the Sun?
Water drips into a bucket connected to the panel’s support. As the bucket becomes heavier, the balance changes and the panel tilts gradually.
6. Can the design be used for large solar farms?
That has not been established by the reported prototype. Larger systems would require engineering work to evaluate structural strength, tracking accuracy, weather resistance, maintenance and overall cost.
7. Why are solar trackers used?
Solar trackers adjust panel orientation to improve alignment with sunlight. Depending on the system and location, this can increase the amount of energy a panel generates compared with a fixed installation.
8. What recognition did Jason Chang receive?
Chang was named a National STEM Champion in 2026 and selected to present his invention in Washington, D.C., according to reporting about the project.
Conclusion
Jason Chang’s solar tracker demonstrates how a simple engineering concept can address a practical renewable-energy challenge. By using gravity, water, magnets and pulleys, the 13-year-old Massachusetts student developed a prototype that reportedly cost less than $25 and generated around 20% more electricity than a fixed solar panel during outdoor testing.
The design is notable because it does not require an electric motor to reposition the panel. Instead, it uses a change in weight to alter the panel’s angle as the day progresses.
Although further testing would be needed to establish its long-term reliability and suitability for larger installations, the project offers an engaging example of low-cost engineering and student innovation.
For aspiring inventors, Chang’s work is a reminder that meaningful ideas can emerge from everyday problems—and that experimentation, careful measurement and persistence are essential steps in turning those ideas into practical solutions.
