Connect SmartHome 5W Solar Panel for Battery Powered Security Camera $19 (Was $29) + Delivery ($0 C&C) @ The Good Guys

USB-C connector, includes Micro USB adapter. Bought few of this during Black Friday sale for an Eufy system, easy to setup, just need to select power source to turn off the charge indicator.

Bunnings has rain gutter mounting brackets, you can find cheaper online if you need more than a couple.

Single mount: https://www.bunnings.com.au/orion-security-camera-mount-clam…
2-in-1 mount: https://www.bunnings.com.au/orion-security-camera-mount-2-in…