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Photovoltaic plants appear as an option for a more environmentally friendly centralized generation. Solar-tracking is used for efficiency gain presenting better performance than fixed tilted plants. However, the system suffers generation and protection problems without the use of backtracking algorithms. Shading conditions can prejudice the energy generation and cause diode failure. This paper studies the influence of backtracking for protection and generation. For protection, it is shown that the bypass diode takes time to activate, generating hotspots. For efficiency, the production and plant size gains are highlighted.