For peace of mind, this kit is a must-have when adding additional electronics to your boat (stereo upgrades, light bars, etc.). Allows you to keep one battery isolated for reserve purposes.
Includes BEP Marine Battery 701S Battery Switch, BEP Marine Voltage Sensitive Relay (VSR), GIL Marine Composite Battery Box, and all necessary wiring and hardware
VSR will allow the engines to charge battery #1 until it is topped off at 13.7 VDC, then automatically switch over to battery #2 to charge it
Turn the knob on the battery switch to select using battery #1 by itself, battery #2 by itself, or both batteries together in parallel
You can also switch off battery current altogether
Dealer installation recommended
Marine batteries not included
Fits any single battery boat with room for another group 24 battery