>As to all this discussion of solar cells... Who ever said I meant solar
>cells?  I said some form of solar collector.  That could be planes of
>mirrors and a boiler, which, AFAIK is more efficient, and takes less energy
>to build.

Most southern countries use solar for warm water and pool heating as a
standard. Water heaters are mounted on the roof and have a 2m^2 panel
attached, also an electrical heater. This country is full of them. For
normal consumption the heater does not run at all for 9 months per year.

Peter

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