What you are doing is optimizing your energy production for maximum savings with your utility company.
Direction to point solar panels.
The traditional advice is to position solar panels to be south facing.
While the angle of your solar panels is important a more important factor in your energy production is going to be the direction your panels face.
The most optimum direction to face your solar panels is somewhere between south and west.
Locating the best direction to point your solar panels can be accomplished very quickly.
This means that your solar panels will be put in a unique direction specifically to maximize energy production between this time range.
Solar south or geographic south.
This is the simplest and fastest way to position a solar panel for the best output.
However there is a difference between magnetic south and true south that must be considered.
To correct the compass reading your solar installer will calculate the magnetic declination of your site.
The direction solar panels should face is true south a k a.
You could use tools if you wanted to but you can just as quickly figure it out with none at all.
True south can also be calculated at noon when shadows from vertical objects run north south.
For the best results solar panels should be oriented towards the south.
Usually this is the best direction because solar panels will receive direct light throughout the day.
This is because the sun is always in the southern half of the sky in the northern hemisphere.
In the northern hemisphere the general rule for solar panel placement is solar panels should face true south and in the southern true north.
Build a simple solar pointer and at solar noon you can point your panel t.
This is because for those of us living in the northern hemisphere the sun is always along the southern part of the sky as we complete our yearly orbit around it.
When you point your solar panels west you are not maximizing the total amount of energy that is produced.
It is at this location that your panels will receive the maximum sunlight throughout the day.