Thanks Bill
Quick update.
I'll be making a video clip of this but so far i have tested the Power Pot against a standard al pot of the same size on a boil test.
The idea was to see how much less efficient the Power Pot is (because of the extra bottom plate not because I want to rubbish it...)
I boiled 1 L in 8:40 sec , same water some output took 12:40 for the PP to come to a boil.
Next I tried the power output/charging bit and here it has become very obvious that it works well with cold water not so much once it gets up towards hot/boiling.
So it can be (in my mind) a workable solution for snow melting on a long afternoon/night if you have plenty of wood particularly in a hut or something like that.
Franco