I get the point. Being the last hour before sunset, you also benefit from multiple suns off the water making a pure vertical orientation near optimal.
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----- Reply message -----
From: "James Lambden" <james@toolboat.com>
To: <electricboats@yahoogroups.com>
Subject: [Electric Boats] Marine Solar Array makes 3 knots
Date: Sun, Oct 2, 2011 10:42 pm
Tracking array numbers work on averages. The 10 X number was an instant change from horizontal to directly towards the sun. Many times on a boat a horizontally mounted array will be aimed away from the sun, due to the boat's heel.
By being focused directly on the sun, the difference is enormous. Considering being able to do this continuously, as you sail, and you can start seeing the potential benefits.
James
On Oct 2, 2011, at 10:32 PM, Femm wrote:
> I've had people ask me about sizing a solar array for here in the northwest/Puget Sound area and I tell people to figure they are only going to get 50 to 60% of their rated output up here most of the time.
>
> I would like to see a real world test to prove that 10X number! I would be more inclined to think it's more like 10 to 12% real world.
>
> femm
>
> --- On Sun, 10/2/11, Myles Twete <matwete@comcast.net> wrote:
>
> James noted:
>
> "Tracker Expected to be released soon. By Focusing on the sun, power developed is as high as 10 times more than if panels are mounted horizontally"
>
>
>
> Really…10x?
>
>
>
> Would you believe 18%: http://www.civicsolar.com/resource/effect-array-tilt-angle-energy-output
>
>
>
> Array Tilt Angle
> (degrees)
>
> Phoenix, AZ (33 North)
>
> Portland, OR (45 North)
>
> Annual Production
> (kWh)
>
> Delta
> (%)
>
> Annual Production
> (kWh)
>
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