Doing this projects I have refound various Adafruit parts I picked up with the best of intentions. Some of these were to make a window mounted solar charging unit for charging up some of the devices I use.

So yeah, lets build that as part of this project. When done it should be a way to recharge your PiFold at night for a days worth of solar gathering. Thats the plan at least.

Update - This came together quickly over the morning coffee.

Parts -

• 1 × Duct Tape
• 2 × JST 2 pin cable https://www.adafruit.com/products/261
• 1 × Medium 6V 2W Solar panel - 2.0 Watt - https://www.adafruit.com/products/200
• 1 × USB / DC / Solar Lithium Ion/Polymer charger - https://www.adafruit.com/products/390
• 1 × Lithium Ion Battery Pack - 3.7V 6600mAh - https://www.adafruit.com/products/353
• 1 × PowerBoost 500 Basic - 5V USB Boost @ 500mA - https://www.adafruit.com/product/1903

Instructions -

• Assemble the Solar Charger and solder the output of the solar panel to the Solar Charger (see instructions at https://learn.adafruit.com/usb-dc-and-solar-lipoly-charger?view=all )
• Connect the JST from the battery to the Battery JST connector of the Solar Charger
• Join the wire ends of the 2 JST connectors to make a double headed wire, red to red black to black. Solder and seal the joins.
• Connect one JST of the new wire to the Load connection on the Solar Charger and the other JST to the connection on the Powerboost 500
• Solder a USB connector to the PowerBoost.
• Freestyle duct tape parts to the back of the Solar Panel, positioning USB ports for ease of access and secure for repeated connects/reconnects

This unit can power from the Sun or an external source and can be used to charge most any devuce with a USB charge port.