Posted by Ron Rosenfeld on October 11, 2007, 11:02 am
On Thu, 11 Oct 2007 10:40:59 +0100, Eeyore
>Ron Rosenfeld wrote:
>> I would probably be figuring the panels at closer to 50 years,
>By which time they will be producing less output of course.
>> and the batteries at 15 years.
>Depends heavily on battery type and typical regular depth of discharge.
And that was specified.
--ron
Posted by Eeyore on October 11, 2007, 5:01 pm
Ron Rosenfeld wrote:
> Eeyore wrote:
> >Ron Rosenfeld wrote:
> >
> >> I would probably be figuring the panels at closer to 50 years,
> >
> >By which time they will be producing less output of course.
> >
> >> and the batteries at 15 years.
> >
> >Depends heavily on battery type and typical regular depth of discharge.
> And that was specified.
One can never be too careful about this kind of thing. Especially with
batteries.
Graham
Posted by Eeyore on October 11, 2007, 9:39 am
Ben wrote:
> Thank you Ron for your very thorough and thoughtful reply. This gives me
> the information I was after. Just using a *rough* calculation I come up
> with the following total cost at an annual rate:
> Panels: $,000 / 25 year life = $20 per year
> Batteries: $,000 / 10 year life = $00 per year
> Inverter + Misc wiring, etc: $,000 / 25 year life = $20 per year
> ---------------------------------------------------------------
> Total Cost Per Year = $,040
That assume you can borrow (or have access to) money at 0% interest.
Graham
Posted by Roderick on October 9, 2007, 7:43 pm
I think you can see from the previous answer that this is an expensive
proposition, and nothing I will say below changes that basic
conclusion. No matter what, grid power is going to be cheaper if you
can get it, especially over a timeframe of 5 years.
You might be able to skimp on the energy calculation in the winter.
If it's going to be cold out, anyway, the refrigerator may not draw
much power, depending on where it's located.
If this is a noncritical application, you can also get by with a
smaller system. For example, if it's just cold drinking water, if
there are too many cloudy days, and the water isn't briskly cold, so
what?
Posted by BobG on October 9, 2007, 8:27 pm
This isn't that barn with a deepfreeze that's keeping some guy's head
frozen for sometime in the future is it?
XML site map
>> I would probably be figuring the panels at closer to 50 years,
>By which time they will be producing less output of course.
>> and the batteries at 15 years.
>Depends heavily on battery type and typical regular depth of discharge.