Hi Roadrunner255
When it says prewired for solar, it means that the wires have already been run and are ready to be connected to the solar panel(s) and controller that you must buy before it operates. They usually run the wires into an overhead cabinet and will have some form of sticker telling you that it is prewired with the wires made available to connect up. There should be wires from the roof and wires from your batteries to connect to the controller you provide. You will also have to mount your solar panel somewhere on the roof.
Paul
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