Note: Surveillance Camera System Contrary to popular belief, solar-powered cameras can also generate electricity on rainy or cloudy days because visible light can also pass through rain and clouds. But it goes without saying that solar powered surveillance cameras are less efficient on rainy or cloudy days, so maximum direct sunlight is beneficial for solar powered surveillance cameras to perform at their best. And, since outdoor solar-powered surveillance cameras come with a weatherproof design, you don't need to worry about them on rainy days. In fact, the occasional rain can be a boon - clean the surveillance cameras on your solar panels for free Surveillance Camera Set