Basically a voltage sensing relay that will produce a good outcome for healthy battery banks but isolates batteries that fall below about 11.5V. A clever product.
• Continuous rating: 140A
• Cut in voltage: 13.7VDC
• Cut off voltage: 12.8V
• Dimensions: 67(L) x 67(W) x 53(H)mm
See TEA784 for a wiring kit version