I installed the solar panel and connected the cam v4 but it won’t power on.
What battery did you include in your system to provide power to Cam v4? Wyze Solar Panel alone is not compatible with Cam v4, and I’m unaware of any solar panel system that could be used to provide continuous power to any camera like this without some sort of battery to store and discharge power to the camera device. Solar Panel’s product page says this near the top:
Requires Wyze Cam Outdoor v1/v2 or Wyze Battery Cam Pro. This device will NOT function as an individual or standalone product or with other Wyze Cams.
See also Wyze Cam Accessory Compatibility.