Use for adding more wire terminations or for isolating or grounding multiple positive / negative circuits. Usable in any system, on or off grid - not just Outback Power systems. Also good for RV and marine. All TBB models have three #1/0 to 14 AWG and eight #6 to 14 AWG screw type compression terminals, which means no ring lugs required. Available with black, blue, white and red insulators. The Battery Bus is .25" (7 mm) thick tin plated copper and can be mounted on the back plate of any enclosure.