I connected the solar panel to my ieGeek ZS-GX3S camera. I checked the camera battery at about 14:00 today and it was at 100%. At 22:00 the battery was at 85%. The last recorded motion detection was 3 days ago. I therefore suspect that when there is insufficient sunlight the solar panel is draining the camera battery.
I hope to be proven wrong.

I have 3 ieGeek cameras watching the front of my home which I have to take down to recharge periodically. I thought I would give the solar panels a go. After fitting they were showing as charging straight away, even though the sun was dipping behind the house. Only just fitted though, so time will tell, but so far very pleased.

great cameras and solar panels very easy to set up and install and due to the compact size easy to put in a place where they don't notice

We were very sceptical as we are not south facing. How wrong we were. This is a perfect product for keeping our camera topped up in North West Lake District, UK.

I have 3 cameras and 2 panels.
One camera is well away from the others and has its own solar panel. therefore I never have to worry about charging.
The other 2 camaras are close to each other, covering different directions. I have mounted the solar panel where, thanks to the long lead, I am able to swap cameras when need be.
Thoroughly recommend the whole system!