Luminous Ion 1500 VA Sine Wave Inverter Is one of the best inverter In the market. It is truly a value for money product. I m using This Product from almost two years and I must say it a great product. Charge Durability is same as new. I am not getting any problem from this inverter till now, it consumes very low amount of Distilled water. I have download water only a single time in the first year. Because it consumes very low amount of water that is why it is a user friendly product. and believe me it doesn’t require any maintenance except distilled water. as a whole it can be say as fantastic Product By Luminous. Other feature like Auto Fan, Auto Charge are also remarkable, I have Used Other inverter too But they are not So good in terms of auto features. But in Terms of Luminous Ion 1500 VA Sine Wave Inverter It gives full satisfaction, because all auto features are phenomenal, this long lasting. As conclusion I would say its a very good product. its a full satisfied produst.