Let's watch this test case

> Also, the technologies you referenced both require waste heat in
> order to produce power. For a solar array, that waste heat will be
> used when it's created. That will do you little good in the middle
> of the night. The fuel cell is optimum for the PV system, because it
> is in fact a battery.
>
> In the end, I don't think that a device of this type is a sufficient
> substitute for a fuel cell. You're still stuck, my friend.

The concept is that PV (or wind right now in Denmark's case) produces
hydrogen during the day from water + electricity, and then the hydrogen
is burned at night to create high temperature heat and electricty is
produced using these MEMS stirling-like engines (or whatever) from that
heat at 60-80% conversion efficiency. So, the fuel cell generation of
electricity is replaced by the MEMS + Hydrogen burning (perhaps at a
slightly lower conversion efficiency, admitted).

--Paul Fernhout