Buzz
Solar energy feels almost magical. Simply position a large panel under the sun, and it generates electricity out of nowhere, capable of powering your devices. It’s affordable, pays for itself quickly, and is completely sustainable. However, the expense of setting up a solar panel system at home can be daunting—typically around $25,000. Much of this cost comes from labor and additional materials, but the panels themselves are also pricey, costing between $200 and $300 based on wattage and panel type.
These costs might make you consider crafting your own solar panels. The good news is, you absolutely can. If you’re somewhat skilled, have experience with a soldering iron, and grasp basic electrical concepts, you can assemble your own panels. All necessary components are available online or at hardware stores, and the process is fairly simple. However, DIY panels may cost as much or more than pre-made ones, so this isn’t a guaranteed way to save money.
Essential Materials for DIY Solar Panels
Solar panels are remarkably straightforward. You only need a handful of basic components:
Photovoltaic (PV) cells. These silicon-based components absorb sunlight and convert it into electricity. They’re readily available online, so you just need to determine your power needs and buy accordingly. For a budget-friendly option, you can dismantle $1.50 solar lights from dollar stores and harvest their small cells to create a low-cost solar array.
For the truly adventurous, you can craft your own PV cells using copper sheets. However, homemade cells won’t match the durability or efficiency of even the most affordable manufactured ones, so purchasing cells is the better choice for reliable power.
Tabbing wire. This flat wire connects cells into “strings.”
Liquid silicone. Used to seal your PV cell connections. John Burke, chair of the American Solar Energy Society Photovoltaics Division, suggests using DC 184 from Dow, though any clear liquid silicone will suffice.
Solder and soldering iron. If you don’t own these, lead-free solder and an iron are available at any hardware store.
Caulk or glue. Opt for 100% silicone caulk to seal your panel. While strong glue can work in a pinch, it won’t offer the same waterproofing as caulk.
Encapsulation material. After connecting and sealing your cells, further protection is needed. Sealing them between sheets of glass is ideal. Alternatively, a laminating machine can be used to laminate your panel, though it’s less durable than glass.
Multimeter. Though optional, a multimeter tool is recommended to test connections during assembly, ensuring everything is intact and producing the expected wattage.
If the joy of building your own solar panel appeals to you, consider buying a DIY kit that includes all necessary components for assembling a small panel.
Steps to Create Your Own Solar Panels
With all materials gathered, you can start assembling your DIY solar panel:
Arrange your PV cells in a grid pattern. You’ll be creating “strings” of cells—rows of cells connected together. A standard panel setup consists of four strings with nine cells each, totaling 36 cells. Use a ruler and tile spacers to ensure a precise and organized layout for seamless wiring.
Cut your tabbing wire into two lengths that span the entire height of your cell strings.
Connect the cells by soldering the tabbing wire from the front of one PV cell to the back of the next, linking positive to negative. Continue this process until all cells in a string are connected. For multiple strings, solder wires across the top and bottom where the tabs extend to join them together.
Check. Use a multimeter to verify your connections and ensure the expected power output. If issues arise, re-solder as needed.
First sealing with liquid silicone. Mix the silicone and carefully apply it using a soft brush, ensuring the wires remain exposed for future connections. Allow the first layer to dry before applying a second coat.
Final encapsulation. Place your cell strings on a glass sheet, ensuring no contaminants are present. Cover with a second glass sheet, leaving the wires exposed. Seal the edges with caulk for a secure finish.
That’s all there is to it. If everything is connected properly, your panel should generate power when exposed to sunlight. For added durability, consider building a plywood frame to encase the glass panels.
For those looking to enhance their DIY solar panel, consider using sturdier frames, pegboards for precise alignment, and additional upgrades. For a deeper understanding of solar energy and DIY panel construction, download the free PDF To Catch the Sun by Lonny Grafman, an Instructor of Environmental Resources Engineering and Appropriate Technology at Humboldt State University, and Joshua Pearce, a professor at Western University in Ontario.
