Import request for Diesel Generators Bulgaria

For a client of ours we are searching for diesel generators with the following parameters:
-Diesel Generator with - 50 kW
- Standby Power - with Automatic Transfer Switch (when electricity goes down to turn on the genset, and when it comes back - turns off the genset)
- Silenced, with Canopy
- Will work no more than 200-300 hours a year
- It's for standby power - cheaper chinese engine and alternator.