Studies on East/West vs South facing panel in North America?

RememberTheMagic

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Sep 26, 2021
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So assuming for sake of argument your only option was to put panels on a 3-degree roof pitched East-West where the east pitch is 10’ off the ground, sloping westward to 9 foot (almost flat roof); also knowing that in this area southern-facing panels get good light from 10 am-4 pm before the trees start shading in the summer and 11 am-3 pm in the winter.

The question is this…. Am I going to lose 35% or more putting these panels on an east-west roof pitch laying almost flat (or slightly facing westward), or will the difference between this and southern facing panels will be more like 10% ?
 

Ampster

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You could use PVWatts to simulate those two scenerios. PvWatts requires input about location that can affect results. Shading is another issue that requires someone to go on your roof with a device to plot the output. PVWatts could tell you how much production would occur in the late afternoons to test your assumption.
 

BIGFOOT

Here comes the sun....
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Jun 15, 2021
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FL SWAMPS
You could use PVWatts to simulate those two scenerios. PvWatts requires input about location that can affect results. Shading is another issue that requires someone to go on your roof with a device to plot the output. PVWatts could tell you how much production would occur in the late afternoons to test your assumption.
Is that an APP or website?
 

Ampster

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