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I thought Conchy and Tookewl are one person anyway.
And Cam: TOOKEWL never said WITHOUT ADJUSTMENT - just without adjustment each hour.
As I read it I understood it like "few times a day would be good enough".
Simple math: sinus value of the sun attack angle to the paness is one of the the factors reducing the output. This means (look at sin curve values) that adjusting few times a day will give you 80 to 95 percent of what you could get if you would be adjusting all the time.
Sin(90)=1 this means 100% of sun rays hits the solar panel
sin(80)=0.99 this means 99% of sun rays hits the solar panel
sin(70)=0.94 this means 94% of sun rays hits the solar panel
sin(60)=0.87
sin(50)=0.76 would be 76%, but at this angle the protective glass starts mirroring some rays away
sin(40)=0.54
sin(30)=0.5
sin(20)=0.34
sin(10)=0.17 this means only 17% would hit the surface, but most is refleced away ba the glass.
So, 30 degree off sun (which is 2 hours) is not a big loss. If you adjust to get 90 degrees in two hours than you must adjust every 4 hours and get more than 95% theorethical gain.
But please: this in math, not real life. Real life includes: clouds, boat swinging at anchor, shaddows from masts, booms, trees etc, forgeting to adjust, dust on panels, ....
Last edited by tomaz_423; 03-20-2007 at 11:45 AM.
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