Hi, can I get back with you in about an hour or two, I have to step into a meeting right now.
I am checking with an associate of my that is well versed in this subject. I will get back with you soon.
30 kw is definitely a large generator.http://www.bergquistinc.com/sites/default/files/academy_guides/Handbook.pdf
Page 8 has a really good table. Bergquist is an industry supplier.I found a 30kw generator that would use 317,625 BTU/hr at 50% load and 490,050 BTU/hr at 100% load. A 250 gallon ASME tank can only provide 216,800 BTU/hr at 20 degrees Fahrenheit.
They correct, the tank would not support that large of a generator.
Do you have the exact model of generator?
If you feel you have received a satisfactory answer to your question, click the Rating button that is appropriate. Experts are credited for each adequately Rated answer they provide. If you have additional questions, please let me know. Thanks
There is a weblink to the Handbook in my previous response, take a look and let me know if you need anything else.
If you have that document printed out, you should be fine.
Good Luck with your case!