[quote=varaahan]
To run a 7.5 HO motor , a 15 KVA genset is sufficient.[/quote]
Actually, even 15 KVA is high. 10 KVA (8 KW) genset should be sufficient for RUNNING your motor. At 75% capacity, it would deliver 6 KW which is more than sufficient for the 7.5 HP (5.63 KW) motor.
Having said that, that’s for running. STARTING the motor requires higher capacity genset then running it. Capacity of genset required to start the motor can be calculated with this handy tool. It depends upon whether the motor is single-phase or three-phase and whether the start method is Direct On Line (DOL) or Star Delta - something you may need to check from TEXMO.