BEP Battery Distribution Cluster f Twin Outboard Engines w Three Battery Banks [717 140A DVSR] Boat Outfitting Trim Tab Accessories The nylon bag features a Mercury Mariner Mercruiser Volvo The nylon bag features a sewn in rigid ring that fits neatly into the deck plate to secure and support extra weight in the bag A user can define whether the generator should be activated by low battery voltage It also allows the starboard engine to charge both the starboard start battery and the house battery when the starboard VSR is engaged It allows the port engine to charge both the port start battery and the house battery when the port VSR is engaged