damn it, ya got me curious...
Search Google using something like cummins generators natural gas or Onan, or other maker. Lots comes up like
these used ones . I'd think there are smaller ones around for the under 100kw market as well.
That rather brings up an important question: How much gas (what rate of flow or max volume per-month) does your contract allow? There should be something about it. If not, ever think of setting up a micro-grid for your area?
For an economics back-of-a-napkin:
You said your rate is $0.07/kWh? Using that and a 300kW load running 24x7 and a standard of 30-day month/12month I get an yearly electric bill of $181,440. If your current area power feed is not setup to give you that, tack on what the Utility or Co-op will charge you to run the power to your location.
Balance that against acquisition, transport, and installation plus maint contract costs of a NG fueled prime-power rated genset over a few years and play with the scenarios. Especially do not forget about the IRS's Section-179 Capital Equipment deduction for small businesses. Good for up to $500k this year
