Deep Cycle Flooded Battery

Deep-cycle flooded batteries are the most popular type in use today for renewable energy systems. Although flooded batteries are available in flat and tubular plate versions this technical brief will concentrate on the flat plate type since this is the most widely used. The term “flooded” is used because this type of battery contains an excess of electrolyte fluid so that the plates are completely submerged. The electrolyte level should be above the tops of plates which serves as a reservoir to make sure that water loss during charging does not lower the level below the plate tops and cause damage.