Causes of electrolysis corrosion:
1. Batteries on vessels within 150 meters and the seabed create electrolysis 24 hours every day, permanently. They are by far the greatest source of electrolysis. SeaBis and Process of Elimination instructions, will protect your vessel from electrolysis corrosion.
2. Shore mains AC connection creating a DC path between boats, is only present while at least two vessels are actually plugged into shore mains and the SeaBis System not used. When SeaBis System is applied the hull, engine and all wet metal are open circuit (in home terms the electrical plus is puled out of the wall socket). No electrolysis can occur.