Anker 531 Solar Panel is a 200W Solar Panel specially designed with 767 Power Stations. It has only one XT-60 port; there is no USB output port.
With a voltage of 48V and a current of 4.17A, the 531 Solar Panel is only compatible with 767 Power Stations. 200W refers to the power of solar panel power is not equal to the actual power of the output ports. There will be some power loss when solar energy is transferred into electrical energy, so the actual power of the output ports will be less than the power of the solar panel.
The 531 Solar Panels are IP67 rated, so they can still function in the rain, but the panels’ performances depend on how much sunlight is available. However, the XT-60 port is not waterproof.