Abstract: A transportable power supply unit is disclosed comprising a load carrying support and an electrical storage arrangement on the support. At least two solar panels are mounted on the load carrying support, each of which is interchangeable between a retracted configuration and a deployed configuration. The load carrying support comprises a base and a rectangular support frame projecting up above the base having four sides. In some forms the unit further includes a post mounted on the base that is extendible between a collapsed configuration for transport and an extended configuration projecting above the support frame. A security camera may be mounted on an upper end of the post.