I got this to use with my indoor solar system, it pretty much cane pre-wiredSo just hook up 12v to it and you have a switched 12volt outlet, two usb charging ports,And volt meter to monitor, voltage level.
Works good and is sturdy.
Pros
High-Quality Materials: GOOACC uses only high-quality materials in the construction of their products, and this 4-in-1 Charger and Power Outlet Panel is no exception. It is made with durable materials that are built to withstand the wear and tear of everyday use
Cons
The LED display does not show the charging status of individual devices