But first: If you don't want to bother with all the technical details, you can just use our solar panel tilt angle calculator to calculate the best solar panel angle for your location or zip code. The most common answer to this question is to set the angle of your solar panels equal to your latitude. So, if your latitude is 30°, you'd set your. Here's a list of the optimal solar panel tilt angles for 50 of the most populated zip codes in the United States. Full list: Best Solar Panel Angle by Zip Code If you don't see your zip code on. The best direction for solar panels is true south in the northern hemisphere and true north in the southern hemisphere. The direction you face your solar panels is also called their azimuth.