On 25-Oct-17 3:27 PM, James Wilkinson Sword wrote:
On Wed, 25 Oct 2017 21:16:41 +0100, dpb wrote:

On 25-Oct-17 2:58 PM, James Wilkinson Sword wrote:
...

There would be no heat let in as the IR would be turned into
electricity.

Only if the conversion were 100% effective...

Whatever the %, you're just changing one gain for another. Unless of
course your house is too warm.

Well, of course, but the PV conversion will be yet another net loss if
actually do need the heat as its conversion is not reversible and
certainly the usage isn't altho if went into resistance heating the loss
wouldn't be huge...

The question would be whether there really were sufficient PV generation
to actually be a noticeable fraction of other usage that could be
replaced. One would kinda' doubt it just from the geometry and all, but
I've not tried to do any sort of guesstimate given there's absolutely no
data with the blurb to even try to estimate what the incident energy
intensity might be in the portions of the spectrum targeted.

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