This article breaks down the 5 structural and usability problems that keep balcony solar brackets from performing, and what to look for instead. In June 2025, Stiftung Warentest published the results of a systematic evaluation of 8 balcony solar systems sold across Germany. Learn about industry standards, material selection criteria, and real-world case studies that prove why "buying cheap" often costs more. The solar ther materials, with strong corrosion resistance. The verdict was stark: 5. nadequate lubrication system design: The lubrication design of photovoltaic bracket equipment is not perfect, especially when dealing with stainless steel materials, there may be insufficient lubrication, resulting in premature wear or reduced efficiency of the equipment.