Many years ago I built the first modern earth-sheltered home in North Dakota.
I was driving a 3/4 ton Chev pickup with a 350 ci engine,
and burned nothing but the ethanol I produced for free in my solar powered still.
I was able to get spoiled grain from local farmers
by offering to clean out the moldy grain
from the edges and bottoms of their storage silos.
I never tasted a drop, because of the moldy grains I was fermenting,
but the 350 drank it without a hick-up.
Contrary to popular opinion I made no modifications to the truck at all;
no timing adjustments, no larger jets, nothing.

I have looked at methayne reactors for heat production in a greenhouse during the winter. Why couldn't the above stated power be used to heat a burner system, or gas stove inside a home or green house? It doesn't take much to run a burner. Same idea as the reactor, but the fuel can come from more options. Where do I find out how to build a solar still?