Also there will be more risk of shade on the wall.
Solar panels south facing wall.
Solar arrays cannot always occupy a customer s rooftop but ground mount systems might not be the only other backup option in these cases.
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.
Solar panels should face south for any home in america to obtain maximum power generation.
4258 kwhrs yr on the roof and 3167 kwhrs yr on the wall.
Updated may 18 2020.
Go west young one.
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.
Wall mounted solar arrays produce less but work in a pinch.
Therefore directions like southwest or southeast are fine.
Here are simulations for roof at 30 degrees facing south and mounted vertically on wall facing south.
Installers have adapted pre existing mounting and racking technology or developed their own to install solar panels on the south facing walls of buildings.
Both options are for 14x300w panels and otherwise identical.
Wall mounted vertical panels are still an energy generating option for solar installers.
However solar panels can be orientated on any roof that faces south of either east or west.
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.