Eaton's Cooper Lighting
TCrouse-Hinds High Amperage Combiner Boxes can handle the increased amperage of T-junction cable system inputs from grid-connected PV solar systems. Box's T-junction cable harnesses reduce one positive and one negative string per row to one positive and one negative string for every two rows of panels. Available with disconnects and various surge protection and fusing options, in configurations of up to 20 strings.
Russelectric: Centralized Paralleling Systems
SC Johnson Professional: Alcare Extra with OPTIDOSE
Horton Automatics: BH Slider
Kimball International: Shore
Protimeter: Aquant