Step 1: Prep the Fabric. ... Step 2: Wire the Solar Panels in Parallel. ... Step 3: Solder the Leads to the Panels. ... Step 4: Solder the Buck Converter to the Leads. ... Step 5: Glue the Charger to the Fabric. ... Step 6: Install the Eyelets (Optional) ... Step 7: Test Your DIY Solar Charger. Aug 6, 2020