This innovative device switches two battery banks simultaneously with one simple On/Off switch while maintaining battery bank isolation - thus minimizing the risk of a dead starting battery bank.
This switch is suitable for outboard motors and small inboards.

Isolates start and house circuits reducing the chance of fully discharging both batteries
Protects electronics from engine starting sags and spikes
Ignition protected - safe for installation aboard gasoline powered boats
Corrosion-resistant, one-piece, tin-plated, 3/8" copper studs cannot loosen; accepts multiple cables up to 4/0
Rated at IP66 - withstands heavy seas, jets of water
Meets ABYC specifications for mounting on all boats, including aluminum
Case design allows surface or rear panel mounting
Amperages in Table are per circuit