Ok, a couple of issues, anyone that says the MEP-006a is rated at 40KW single phase is making a guess, it may be an educated guess, but it is a guess since these generators were rated 3 phase only at 60KW, and that rating was likely somewhat conservative, as commercial generators powered by the same engine tend to be rated around 75KW. The unknown factor here is in the generator end and at what point it starts being overloaded, and over heating. The next point of concern here is wet stacking, if you don't know about wet stacking look it up, but simply put diesel engines clog up with partly burnt fuel if ran for long periods of time at light load, and should generally operate a substantial percentage of the time at 50% load minimum, and 80+% ideally. So as you might see we are running into a corner case problem here with an engine that can turn a 75KW generator end running at an effective just over 50% load when maxed out at 40KW single phase output. This is in effect an over sized diesel engine on a generator which is a recipe for wet stacking. Next I would like to ask how confident you are in knowing you need 30+KW, and is this worst case or sustained load? I ask because I have a 33KW commercial diesel generator installed at my elderly mother's house, which is a large (3500+ sq ft heated) all electric house with water well, 3 50 gallon water heaters and 1 20 gallon, 3 resistive central electric heaters, etc. and it can allow nearly normal life with only minimal power management concerns (don't have all the heat on in the house, while cooking thanksgiving dinner, and doing laundry). For winter outages it is limited to 2 of the 3 heaters, plus anything else at once, or will run all 3 if water heaters, stove, etc. are off.
Ike
