fuel

Mr.Mark wrote:
I use both the trip computer and my manual calculations. I also note when I use the genny and the webasto which are not often. For heat, we have two very powerful electric tow kick heaters (in the kitchen area and the rear bath), heated floors and heat pumps.

We can also use the roof airs without running the generator. We have four 3,500 watt inverters and four alternators.

And, so far, I find the trip computer to be very accurate.

Keep in mind that whether you are using the alternators or the generator makes no difference to fuel consumption. They are both robbing power in exactly the same way from your diesel fuel and both drain your fuel tank exactly the same without providing propulsion, they rob MPGs. Electric heating and air conditioning get their power from somewhere and that power is your diesel fuel when you are under way. As you know, there is no such thing as free energy.

The heat pumps probably don't work under 40 degrees so that will kick in your Webasto to heat the floors while you sleep.

I'd also imagine that your generator is set to automatically exercise once a week. Don't forget to count that.