We hear this all the time. A potential customer walks up to our booth at a show or visits our crew at an install and says those dreaded words, "I don't have a south facing roof so I can't do solar."
STOP RIGHT THERE.
Yes you can!
Here is an example of a solar installation with very little south facing roof coverage. The cool part of this solar install is that it makes much more than the household uses each day. We filled up what we could on the south slope then made up the difference on the other East and West slopes.
Would this customer need this many panels if they could do all south facing panels? Of course not however we still achieved our goal with a projected 110% coverage of the customers electrical bill by adding East and West facing panels.
What is the difference in power production of panels on an east and west slope vs a southern sloped roof you wonder? It's not as drastic a difference as you may think.
Here is the output on the first row of south facing panels on this install at 1:16 CST in a full sunlight day with not a cloud in the sky.
And here is the east facing panels output at that same time.
So don't let a non south facing roof deter you from at least looking into your options to go green with solar. Even an East or West facing roof can still produce decent power output. It's never going to be the same amount of power as a south roof slope but the power produced is still green and not as low output as you may think.