Warranty Duration and Scope Clarity Study the manufacturer’s warranty policy carefully. A clear and reasonable warranty period is an important factor in measuring the quality of after-sales service. Generally, high-quality manufacturers will provide a warranty period of at least 1 to 3 years. At the same time, the warranty scope should clearly cover key parts such as the cabinet structure and main electrical components of the power distribution cabinet. For example, during the warranty period, if the cabinet is deformed or electrical components are damaged due to material quality or manufacturing process problems, the manufacturer should clearly assume the responsibility of free repair or replacement. The actual implementation of the manufacturer's warranty policy can be judged by asking other customers or checking customer reviews. If the manufacturer can actively fulfill its commitments during the warranty period, deal with issues that meet the warranty conditions in a timely manner and free of charge, and does not shirk responsibility, then the quality of its after-sales service will be relatively high.