Valve Regulated Tubular Plate GEL Batteries for Stand-By ApplicationsOPzV batteries are characterized by maintenance-free, long service life, excellent reliable performance even in harsh conditions (high operating temperatures or unstable power network), thus providing a premium, efficient and cost effective energy solution.Optimum design, according to DIN international standards, exclusive use of high quality raw materials, robust construction and state of the art manufacturing processes make this OPzV range the ideal solution for stand-by applications requiring high level of safety and reliability.