If you want to use several FREDDYs in different directions, you need several inverters. With FREDDY, the current flow changes with the strength of the light. The more light that falls on FREDDY, the more electricity flows. A special Maximum Power Point Tracker (MPPT) in the inverter regulates the voltage (volts) and the current (amps) to maximum power (watts). If several FREDDYs are aligned in different directions on the same controller, they receive different amounts of light and have different current flows. Now the controller can no longer get the maximum power out of the solar modules. Source: https://www.veichi.org/solutions/related-articles/what-is-mppt.html