The most efficient tilt for photovoltaic panels in Anaheim, California at a latitude of 33.84°:
Your photovoltaic panels need to be angled facing south.
If you're mounting the photovoltaic panels at a stationary angle, such as on your roof, the most efficient angle is 28.8°.
If you're planning to change the angle of your photovoltaic panels twice per year, the most efficient angle is 10.5° in summer months and 48.8° in winter months.
If you're planning to change the angle of your photovoltaic panels each season, the most efficient angle is 6.8° in summer months and 54.1° in winter months, and 30.9° in autumn and spring months.