Gary,

Great question on power needed. The answer is both yes and no.

Simply by the numbers, the 120V unit draws a maximum of 2.4Kw while the 240V unit draws a maximum of 3.7Kw. BUT...there's more to the numbers.

The 120V unit draws all of its power for one of the two 120V legs that support the coach. So, the 240V unit, any 240V unit, will balance their current draw across both legs of 120V coming into the coach. Back to the numbers one last time, the 120V unit can draw up to 20A@120V and the 240V unit can draw up to 15.4A@240V.

Good quality induction cooktops are said to be 40% more efficient than resistive cooktops. That should mean lower current draw for equal cooking time or much faster cooking time. Time will tell. I do know it took forever to boil water with the old cooktop and the new one boils water in what seems like seconds. And that's on the smaller burner. BTW, the smaller burner is 1400 watts, just 200watts more than the 120V unit.

Yes, load shedding should be considered. My winter project is to reconfigure my AC distribution system to include automatic load shedding. Today, my simplistic Hoffman conversion (which is one of the reasons I like Hoffman conversions) leaves load shedding to the user. That's' not the best idea. My system will build upon the Hoffman simplicity and use current sensors and solid state relays. At least that's what I have drawn out right now.