TIGO optimisers use a core technology developed and patented by an Australian who understands the harsh nature of our environment. TIGO is a great solution for enhanced shade performance as it works more independently bypassing solar panels that are under the shade and keeping the efficiency of the other panels intact.
A TIGO optimiser is a black box installed with your panels to ensure the shaded panels produce partial energy, while a bypass diode would completely shut down the operation of a shaded grid. In shaded conditions, it creates a bypass tunnel for the current to flow which is equivalent to the impedance caused by the shaded grid and protects the function of a bypass diode by acting before a diode engages.
Hence, TIGO optimisers increase the life of your solar system by not relying entirely on a bypass diode for combating shade issues.