Ask Lapierre what the start surge amps are. You want at least 50% more than that + what everything else will be using if they are all one when the RO tries to start. Then the generator should be rated at that wattage as a steady run, not just the surge amps or watts. A brown voltage (temporarily too low) during startup is the biggest cause of electric motor pre-mature failures.
Dave Klish, I recently ordered a 2x6 wood fired evaporator from A&A Sheet Metal which I will be converting to oil fired
Now have solar, 2x6 finish pan, 5 bank 7x7 filter press, large water jacketed bottler, and tankless water heater.
Recently bought another Gingerich RO, this one was a 125, but a second membrane was added thus is a 250, like I had.
After running a 2x3, a 2x6, 3x8 tapping from 79 taps up to 1320 all woodfired, now I'm going to a 2x6 oil fired and a 200-425 taps.