Testing generic 6w solar panel on Eufycam

Hello all,

I have the original Eufycam and I am trying to add solar panels to keep the battery charged. Can someone please tell me the specs required of a solar panel to make this work? Not just the now released Eufy Solar Panel.

I have tried with a generic 6w panel that through the Eufy app shows that a panel is connected and that it is charging with the battery status bar. However even in full sun the battery percentage does not increase for the camera. The setting in the app to switch to solar has also been changed. All firmware is up to date.

Thanks in advance