Hi saemdu90 I have now been using the camera (without solar) for 4 days and still have 89%.

Exactly. The same for me.
Only my camera is in operation 24/7 but only online a few times a day to "monitor"

Since the purchase, I have charged the camera or the battery initially once and then connected the solar panel. The panel charges even when there is little sunshine. I have therefore never had to charge the camera, which has been in continuous operation since January 25.