The MK OPzV series battery is designed for deep-cycle applications and is ideally suited for backup power systems, renewable energy storage, and off-grid installations. “OPzV” stands for “Ortsfest (fixed) PanZerplatte (tubular plate) Verschlossen (sealed),” reflecting its sealed and maintenance-free design. These batteries feature tubular gel electrolyte technology that provides excellent cycle performance and high tolerance to deep discharge.