If that is the case ,then all the places lying in that latitude should have the same climatic conditions.The earth rotates like a top, so the angle varies from place to place.
The advisable thing to minimize the technological costs is to fix the solar azimuth and to carry out a study on the influence by the variation of the inclination angle of solar collector (monthly, annually, seasonally). The latter has more influence on the amount of radiation collected than the azimuth when change latitude.
With fixed-azimuth systems, the panels or other solar collectors are almost always oriented towards the equator (0° azimuth in the northern hemisphere, 180° azimuth in the southern hemisphere).