Maintain your inverter battery with ease using the Inverterdicator Battery Water Level Float-in Cap Set, specially designed for compatible Luminous inverter batteries. This set of 6 float indicator caps helps monitor the electrolyte water level, making battery maintenance simpler and more convenient. Each cap features a built-in water level float indicator that provides a visual indication of the electrolyte level, helping you identify when distilled water needs to be refilled. The integrated fume filtration system helps minimize acid fumes and reduces electrolyte splashes during battery operation, promoting cleaner and safer maintenance. Made from durable, high-quality materials, these caps are easy to install and fit compatible battery cells securely. They are ideal for replacing worn-out or damaged battery caps and ensuring efficient battery upkeep.