The inverter of luminous is one of the best inverters and it is most seen inverter around us it is very liable you font need any warranty card or anything bexause luminous inverter are the most used and quality of product and we dont need to forget brand ambasssador of luminous is our great master blaster sachin tendulkar but I am quite unhappy wuth my latest and new inverter of luminous because it lags angain and again it cut and start agaian and again and the beep sound ia very irritating for everyone I have 3 inverters and all have same problem of cut and start again sometimes after light gone my televison is also shut dowj and start again