Smart Dual Battery 140A Isolator (VSR Voltage Sensitive Relay) for Auto/Boat/RV

12V 140A smart isolator with Cut-In:13.4V, Cut-Out:12.9V
Easy 3 wire connection at the battery. No need to bypass existing alternator wiring
The smart isolator has no voltage drop. Conventional diode isolators incur a minimum of 0.6 volt drop
Compact 2.5 inch by 2.5 inch by 2 inch size - No large heat sink
Easy to install anywhere - Water and dust resistant