I recently acquired a 12kw three-phase Onan propane generator, like new, given to me basically. Is there a way to convert three-phase into single phase for use in a normal residential home, without swapping-out the gen head? My instincts tell me the answer is going to be, "step down transformer" or converter of some sort. But I was hoping there may be another way or either hoping to have it confirmed that I am on the right track with the transformer (sic) train of thought, pardon the pun. Viewing available diagrams, I see no way to do it via a simple wiring conversion. Any suggestions or advice is greatly appreciated in advance men. Thank you.