J Series genset is the good genset brand among gensets manufactured from China. And it's sound proof system is good quality too.It's quality is high even though it is China Brand.Diesel Generators work by using diesel as fuel. It simply generate electricity by converting mechanical energy to electrical energy by using Diesel engine and alternators. Warranty - 1,000 working hours or 12 months from the date of delivery whichever comes first. ( During warranty period Customer need to use our recommended maintenance parts) In warranty period - Free Service Charges for regular maintenance during warranty period.