I have Luminous ecowatt 850 in my house and I love its design and and colour and it back up is also good it give around 6 or 7 hour back up when I use all rooms fans and lights and television also its is enough for every house now im happy from my new inverter. It have 2 year warranty and have many features like eco mode in this mode its shows us that every thing is going on is good means no overload is going on and overload feature is also there whis show us that there in somewhere the overloading is going on. And it low battery function is also there which tell us about battery is low and water function is also there by this we dont have to check water every weak it automatically show us that water is low so we have to fill it