Lianlock - 7.5 kv
Runs 5 energy savers, 1 fan, refrigerator, deep freezer (waves) and 1.5 ton split a/c unit all together
Otherwise refrigerator, deep freezer (waves) and 1.5 ton split a/c unit plus TV
Or 2 energy savers, refrigerator, deep freezer (waves) and water pump running simultaneously..
doesn't break a sweat 
Runs on Gas/Petrol
Costs about Rs.310 per month on a 1 liter motor oil change for maintenance. I swap the spark plug every 2 months too. Nothing else, I can think of at this time. Cost me around Rs. 70,000 a year ago. Brand new.
If you can afford something better then go for a used Briggs & Stratton. Those American machines are built tough to last a lifetime.