Solar arrays cannot always occupy a customer s rooftop but ground mount systems might not be the only other backup option in these cases.
Solar panels south facing wall.
Both options are for 14x300w panels and otherwise identical.
Although this is more unusual some people choose to mount panels on a south facing wall.
If you have space in your yard the panels can also be mounted on the ground.
Updated may 18 2020.
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.
Therefore directions like southwest or southeast are fine.
Also there will be more risk of shade on the wall.
Wall mounted solar arrays produce less but work in a pinch.
This is less expensive and also gives easy access to the panels if you need to clean them brush off snow or do any other maintenance.
However solar panels can be orientated on any roof that faces south of either east or west.
Here are simulations for roof at 30 degrees facing south and mounted vertically on wall facing south.
Wall mounted vertical panels are still an energy generating option for solar installers.
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.
4258 kwhrs yr on the roof and 3167 kwhrs yr on the wall.
Go west young one.