Solar Battery UTL 40AH Solar Inverter Battery To know about the advantages, we should focus on the advanced design specifications of this inverter battery. It has a unique tubular gauntlet /Nat positive plate design, which offers cyclic stability, longer life, and higher capacity than flat plate batteries. It is made using superior active material & special grid alloy that help the battery to recover fast from deep discharge. Float vent plugs are provided for electrolyte level indication. The battery is covered with HDPE material caps which enhances the overall battery life. It is a C10 rated solar battery designed for better performance.