Solar panel efficency
in [Design]
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From: John Fields on 31 May 2010 09:02 On Mon, 31 May 2010 22:52:38 +1000, Sylvia Else <sylvia(a)not.here.invalid> wrote: >On 31/05/2010 10:43 PM, John Fields wrote: >> On Mon, 31 May 2010 22:25:27 +1000, Sylvia Else >> <sylvia(a)not.here.invalid> wrote: >> >>> On 31/05/2010 1:54 PM, Robert Baer wrote: >> >>>> No real estate restrictions but do not need much panel area to light a >>>> small room. >>> >>> I'd just open the curtains myself. >> >> --- >> Where I live, sometimes it gets dark outside. >> > >Yes, but I find that solar panels don't work too well then anyway. --- Ah. Then, you're advocating placing an array indoors and insolating it through a window by opening the curtains?
From: Martin Brown on 31 May 2010 09:11 On 31/05/2010 13:43, John Fields wrote: > On Mon, 31 May 2010 22:25:27 +1000, Sylvia Else > <sylvia(a)not.here.invalid> wrote: > >> On 31/05/2010 1:54 PM, Robert Baer wrote: > >>> No real estate restrictions but do not need much panel area to light a >>> small room. >> >> I'd just open the curtains myself. > > --- > Where I live, sometimes it gets dark outside. But he only asked about maximum solar panel efficiency with cost no object that does not include either a charge controller or batteries - which is pretty funny for someone on a wet string internet connection. A half decent solar panel comes out at around $800 /m^2 plus installation and unless you are getting some special "green" generation rate is hopelessly uneconomic. German market is distorted this way. Even off grid it is pretty marginal and there are cheaper ways of generating modest amounts of power. The only advantage I can see for PV is no moving parts and unattended operation. The economics may be different when we can screen or inkjet print PV arrays from organic dyes at modest efficiency and plausible stability in bright sunlight. So far that remains a pipe dream Regards, Martin Brown
From: Sylvia Else on 31 May 2010 09:50 On 31/05/2010 11:02 PM, John Fields wrote: > On Mon, 31 May 2010 22:52:38 +1000, Sylvia Else > <sylvia(a)not.here.invalid> wrote: > >> On 31/05/2010 10:43 PM, John Fields wrote: >>> On Mon, 31 May 2010 22:25:27 +1000, Sylvia Else >>> <sylvia(a)not.here.invalid> wrote: >>> >>>> On 31/05/2010 1:54 PM, Robert Baer wrote: >>> >>>>> No real estate restrictions but do not need much panel area to light a >>>>> small room. >>>> >>>> I'd just open the curtains myself. >>> >>> --- >>> Where I live, sometimes it gets dark outside. >>> >> >> Yes, but I find that solar panels don't work too well then anyway. > > --- > Ah. > > Then, you're advocating placing an array indoors and insolating it > through a window by opening the curtains? > And then running an electric light (LED of course) off it. Yes. Sylvia.
From: Sylvia Else on 31 May 2010 09:55 On 31/05/2010 11:11 PM, Martin Brown wrote: > On 31/05/2010 13:43, John Fields wrote: >> On Mon, 31 May 2010 22:25:27 +1000, Sylvia Else >> <sylvia(a)not.here.invalid> wrote: >> >>> On 31/05/2010 1:54 PM, Robert Baer wrote: >> >>>> No real estate restrictions but do not need much panel area to light a >>>> small room. >>> >>> I'd just open the curtains myself. >> >> --- >> Where I live, sometimes it gets dark outside. > > But he only asked about maximum solar panel efficiency with cost no > object that does not include either a charge controller or batteries - > which is pretty funny for someone on a wet string internet connection. I suppose the OP can legitimately observe that the question he asked is capable of an answer. But, yes, it was a very strange question. > A half decent solar panel comes out at around $800 /m^2 plus > installation and unless you are getting some special "green" generation > rate is hopelessly uneconomic. Even more so if you pay the proper market price for the using the grid as a supplier of last resort. Sylvia.
From: Spehro Pefhany on 31 May 2010 10:02
On Mon, 31 May 2010 23:50:47 +1000, Sylvia Else <sylvia(a)not.here.invalid> wrote: >On 31/05/2010 11:02 PM, John Fields wrote: >> On Mon, 31 May 2010 22:52:38 +1000, Sylvia Else >> <sylvia(a)not.here.invalid> wrote: >> >>> On 31/05/2010 10:43 PM, John Fields wrote: >>>> On Mon, 31 May 2010 22:25:27 +1000, Sylvia Else >>>> <sylvia(a)not.here.invalid> wrote: >>>> >>>>> On 31/05/2010 1:54 PM, Robert Baer wrote: >>>> >>>>>> No real estate restrictions but do not need much panel area to light a >>>>>> small room. >>>>> >>>>> I'd just open the curtains myself. >>>> >>>> --- >>>> Where I live, sometimes it gets dark outside. >>>> >>> >>> Yes, but I find that solar panels don't work too well then anyway. >> >> --- >> Ah. >> >> Then, you're advocating placing an array indoors and insolating it >> through a window by opening the curtains? >> > >And then running an electric light (LED of course) off it. > >Yes. > >Sylvia. It might almost sort-of make sense if you wanted some particular color of light exclusively. |