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Posted by Giga2 on April 5, 2011, 4:03 pm
 


Don't you need to take account of the residual value as well tho?



Posted by Falcon on April 5, 2011, 8:48 pm
 

Good point. What will be the residual value of 25 year old solar panels?
Will an item guaranteed for five years by the manufacturer actually last
that long? I would imagine your guess is as good as mine :-)

--
Falcon:
fide, sed cui vide. (L)


Posted by Giga2 on April 6, 2011, 7:59 am
 

5 year guarantee is MASSIVE! After all its pretty much a solid-state
component with no moving parts AND it is modular. I can't see any particular
reason they wouldn't last for 50 years (but there may be?). The main thing
that will undercut residuals is perhaps similar to computer technology. The
new stuff will be so cheap and a lot better making older models almost
worthless. However it will already be installed and essentially doing the
required job so should still have a reasonable value to any new owner of the
property.



Posted by Dawlish on April 6, 2011, 8:16 am
 On Apr 6, 8:59am, "Giga2" <"Giga2" <just(removetheseandaddmatthe
end)ho...@yahoo.co> wrote:

I agree. I have a Casio HS-7 solar powered calculator. I got it when I
started teaching in 1980. It's battered, but it still works perfectly
today (and actually in lower light intensities than a more recent
one). It's working **31 years** after being bought and I see no reason
why it won't work in another 31 years time. I think it will see me
out. I know it is not the same as rooftop solar panels, but it does
illustrate that this kind of solid-state technology can be extremely
reliable.

Posted by Tom P on April 6, 2011, 6:56 pm
 On 04/06/2011 10:16 AM, Dawlish wrote:

I find the discussion about ROI, guarantees etc etc fascinating... I
wonder how many of the people poo-pooing PV panels here pay as much
attention to the TCO of their new cars costing 2-3 times as much as a
roof full of PV panels, not to mention whether the car will still be
working in 25 years time  and how much it will still be worth?

And yes, the panels have a guaranteed profile for performance over 10 years.


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