That's my first thought. My head scratching begins with being in the woods without clear view of the sky, wondering if it will get enough light. Digging the finger nails in deeper, in reading your recent post, it might be able to limit power draw to still make it work.
I bought 2000mAH Li-Po's. How important is it to use Adafruit's panels with their chargers/batteries?
Next question on the PIR, though, even with the jumper, it started firing continuously with no stopping for 2 hrs until I just pulled power, even under a black cloth. I'm really lost. I put the jumper on for "H" - repeating. Guess I don't understand the two modes.