Hey grasshopper, burn has a existing ac synchronous gen as well as AC contractor portable, we discussed in pm, he was looking into converting his gasoline units to nat gas with after market carb kit. I was answering his Q about expense of paralleling AC generators.
gensets are not designed for 24/7/365 use
I've seen thousands installed that run prime power.
Your idea is both plausable and feasable, but initial outlay of capital I believe exceeds burn's budget, he has a very good old 18hp engine Cast iron engine, whats the gen eff of of your DC alternator and approx cost of alternator alone?