But what if you don t have a suitable south facing roof.
Solar efficiency roof orientation.
Therefore directions like southwest or southeast are fine.
Small variations away from these ideals will not result in a significant difference in the power output of your solar energy system which is why the natural tilt angle of your roof is usually fine and keeping that tilt frames can add significantly to the cost of your system putting a damper on the value of the solar power it produces.
Each situation is unique in terms of roof angle property layout and power consumption.
One solution is to compensate by increasing the solar collector area either using more panels or larger collectors.
The effect of orientation on solar output the direction solar panels should ideally face for optimum sun exposure varies depending on location.
Even with this decrease in performance solar panels will produce enough electricity to save you hundreds of dollars a year.
Why orientation matters with rooftop solar in general solar panels that are oriented directly east or directly west will produce about 20 percent less electricity than if they were facing south.
For the best results solar panels should be oriented towards the south.
The ideal orientation for a solar panel array is due north and the ideal tilt angle is the angle of your latitude e g.
There are two types of solar panel mounting options.
However solar panels can be orientated on any roof that faces south of either east or west.
Other orientation options while the general consensus in the solar power industry is that either west or south is the best direction for solar panels to face these two options don t necessarily address the needs of every individual solar user.
Solar panels facing east or west won t get as much light as those on a southern facing roof.
Go west young one.
This is because the sun is always in the southern half of the sky in the northern hemisphere.
Fixed or tracking solar panels.
If your roof faces east west rather than north south you have a few options.
An ideal south facing roof here is pitched at 7 12 39ish degrees and the north side of that roof will produce less than half as much electricity.
About 30 degrees in sydney and perth.
In fact all southern hemisphere locations should ideally position panels in a northerly direction.
Fixed panels are stationary and remain at the same pitch throughout the day and year.
In the northern hemisphere the sun crosses the sky a little to the south which means putting solar panels on a south facing roof is the best way for homeowners to capture the most solar energy.
Panels mounted on a standard pitch roof facing east or west will produce approximately 15 less output than panels mounted on a south facing roof of a standard pitch.
Well when it comes to solar panels west is second best.
For australia solar power yields are higher when panels face north.
As most roofs are not flat your solar contractor will factor the pitch of your roof into the equation.
Adding modules on the north side of the roof will not add much bang for the customer s solar buck and would qualify as solar malpractice in my book.
