Answer Posted / electrical testing engineer

Generators are also rated in KVA. In our general terms we use terms 30KW machine but actually technical rating of any generator is in KVA.
All equipment which can supply the power are rated in KVA, because their O/P power will depend on the load type you connect with it. 45 MVA machine can give as high as 36 MW power if you improve the PF or other machines are pumping enough reactive power in the network. Thus generator Watt will vary depending on the load same as the transformers. transformers too can operate on varying degree of the MW loads depending on the load connected.
Only electrical loads such as motor, heaters are mentioned in KW.

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