2.3 kva can't run your AC. Get atleast 5 kva, and that too a good brand like honda, otherwise it will ruin your AC. Or get a 5 kva china or korean with atleast 3kva surge protector (servo motor control). In short, running your AC on generator isn't cheap!
You can also have a 3-5kva solar system, but that only for day time.
Also measure your room before buying 1 ton AC. Its only suitable for 12*12 sunny room or 12*14 shaded room.