Solar On North Facing Roof

On a north facing roof at 25 7 that would be 5 362.

Solar on north facing roof.

The tilt of the roof matters a great deal. With a 2 12 pitched roof 9 5 tilt the south facing array will produce 1 361 kwh kwp. But on a north facing roof with a shallow pitch say 3 in 12 or 14 production would be 6 234 kwh year or 16 higher though still nearly 25 less than the ideal tilt on a south facing roof. They produce slightly more electricity during the afternoon and slightly less in the morning.

1 alternative mounting location. Generally this isn t the best solution since these panels still won t yield much energy. However the economics of installing solar panels on a roof that does not face the south still usually stack up for the homeowner. This is a good option if the house roof cannot support the panels or there is a building with a better roof angle.

It s possible to mount solar panels so that they oppose the slant of your roof though this solution may not be as aesthetically pleasing as they won t sit flush. I ve taken a close look at the roof angle 23deg and sun angles through the months where we would actually need the heat and am fairly confident in the benefits. Go west young one. That optimal tilt will make you an estimated 7 732 kwh in a year from 5 5 kw of solar panels.

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. While it is technically possible to install solar panels on the north side of your roof they need to be mounted so that they oppose the roof s slant in order to generate electricity. 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. But what if you don t have a suitable south facing roof.

Not great to be sure but probably not as bad as you might expect. A north facing array on that same building will produce 1 145 kwh kwp a difference of 16 compared to the south facing array. Well when it comes to solar panels west is second best. Solar panels that face north west will produce around 5 less electricity overall than north facing panels.

For home it is possible to have solar panels installed on a northwest facing roof but the amount of energy that you generate will be around 1 3rd of what you would generate facing south. The chart below will give you an idea of how the solar pv production reduces depending on your roof orientation and tilt. Their electricity production through the day will be between that of north and facing panels and that of west facing panels. Unfortunately or fortunately depending on how you look at it our only available roof space is north facing due to our pv solar on the south roof.