Abstract: Assemblies for supporting energy storage equipment, and more particularly, pre-fabricated, above-ground, affixed, ventilated or non-ventilated, power feeder chassis assemblies for large-scale electrical energy storage equipment, comprising a frame unit with certain features that make it capable of supporting energy storage equipment and a cable feeder with certain features that connect destination equipment to the electrical energy storage equipment. Various features of the assembly are described. Also described are methods of manufacturing the same, some of which are directed to methods of pre-fabrication, mass manufacture and transportability. Also described are methods of installing the same, some of which are directed to methods of laying out in grid patterns for large-scale projects.