This invert doing good job for my dairy farm I have 20 animal in my dairy farm .i am using this invert since 5years I am not facing any problem while using this inverter .it run 5hours with 5 tube light after full charging .and two fan.i am happy about this product .i am recommendjng this product for other .i have got waranty for 5 years .zero maintainace company agent come to my dairy farm and fill acid water in all points every 4 three months with free of cost .luminus univerter one of trusted company in india .good battery and qualty is batter they are using