I have just bought the 800 va luminous inverter and it has made my life heaven. They are so efficient that you cant even make out whether the power is there or not. I live in a 2 bhk apartment in sagarpur, west Delhi, an area marred by frequent power cuts. Life was hell earlier. Thanks to this excellent product from Luminous, my appliances are working perfectly despite frequent power cuts. I would recommend it to every body.