I highly recommend OES Power gensets if you want quality at an affordable price. I recently bought their 2 kW gasoline generator (without gas kit) from Metro for Rs.37000/=. After a lot of market research, I finally found a brand that is manufacturing quality generators and also provides excellent after sales support.
It includes a 1 year parts and labor warranty as well as free first 2 tuneups (oil change and general checkup) at 25 hrs and 80 hrs.
Compared to similar power Chinese models costing Rs. 32k , the OES Power generator overall build quality is visibly better. Also, Chinese ones come with zero warranty for that price.
For their 1 year warranty to be claimable, they require an OES auhorized technician to commission the generator for first use. I also asked them to install a gas kit for me. So for Rs.3000/=, an OES tech came and installed the gas kit, put in the motor oil and got it up and running on both petrol and natural gas.
The service techs recommend the generator be run on petrol for the first 30 hours, after which it can be run on natural gas.