The most efficient tilt for photovoltaic panels in Wichita, Kansas at a latitude of 37.69°:
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 31.7°.
If you're planning to change the angle of your photovoltaic panels twice per year, the most efficient angle is 14.1° in summer months and 52.2° in winter months.
If you're planning to change the angle of your photovoltaic panels each season, the most efficient angle is 10.4° in summer months and 57.5° in winter months, and 34.6° in autumn and spring months.