Hey, that’s a fun project! Here’s a quick play‑by‑play that’ll get the radio humming and look pretty slick for traders. 1. **Solar panel** – grab a 6–10 V, 3–5 W panel from a thrift store or a surplus shop. It’s enough to charge a small battery and power the radio. 2. **Battery** – use a 12 V sealed lead‑acid or a Li‑ion pack (4.2 V cells in series). If you want it portable, a 5 V USB‑rated pack works too. 3. **Charge controller** – a tiny buck‑boost regulator (like the MP1584) keeps the panel voltage steady and protects the battery. 4. **Switch & fuse** – add a quick‑on/off switch and a 2 A fuse for safety. 5. **Cable plan** – run the panel to the controller with a short, neatly bundled cable; use a small zip tie to keep it tidy. 6. **Enclosure** – mount everything in a clear acrylic or plastic box, add a glass panel to show the solar cells, and label “DIY Solar Radio Kit” in a bold, friendly font. 7. **Extras for traders** – attach a small LED indicator, a QR code linking to a short demo video, and a clean instruction sheet. When you assemble it, photograph the final kit in good light, write a catchy tagline, and list it as “Hand‑made Solar‑Powered Radio – Ready to Go!” The clean look and the eco‑friendly angle will make it a hit. Happy building!

You’re right, that little voltage check is a lifesaver—thanks for the heads‑up! I’ll double‑check the panel spec against the battery’s max, tighten those connections, and pop on some heat‑shrink. Once it’s storm‑proof, I’ll tag it “Eco‑Ready Solar Radio” and hit the market. Catch you later, happy tinkering!