I have been using this Luminous Inverter and UPS for the last one year but I am very disappointed with this product.Whenever I switch to the UPS to switch on the desktop, it merely stands upto an hour and for Inverter use it stands no longer than 45 or 50 minutes.I have taken this product to the service centre so many times that the service expenses reached almost the price of the inverter.Even they do not provide warranty on the problems which it faces though the problems did not occur due to misuse of the product.I do not recommend other to buy this inverter.