This is because it s based on the average position of the sun over your property.
Optimal sun angle for solar panels.
Optimum angle differs during winter months.
To get the best out of your photovoltaic panels you need to angle them towards the sun.
For example if you are seeking to maximise solar generation during winter months be it for an off grid system or higher energy consumption levels you would ideally want to angle your panels at a greater tilt for maximum exposure to the low winter sun.
Depending on where you live the best angle at which you should install solar panels will change.
Solar panel angle by zip code.
Calculating the optimal solar panel angle.
Here two simple methods for calculating approximate solar panel angle according to your latitude.
The ideal angle for your solar panels can vary depending on your solar objectives.
Calculating the ideal angle for your solar panels is not that difficult.
The angle of your solar array is an important factor in maximizing your energy production.
On the contrary in the countries of the southern hemisphere such as south africa and australia the best orientation is true north.
As a rule of thumb solar panels should be more vertical during winter to gain most of the low winter sun and more tilted during summer to maximize the output.
As a general rule of thumb keep in mind that the panels need to be more vertical during winter to face the lower sun directly and more tilted towards the ground during summer to face the higher sun.
This solar angle calculator tells you the optimum angle to get the best out of your system.