A unified cost accounting model for China's solar photovoltaic sector was officially released on July 27, aiming to guide orderly competition with a standardized benchmark. The model establishes a cost calculation framework spanning the full industry chain from polysilicon to modules by unifying calculation scopes, coefficients and models, eliminating inconsistent cost accounting practices across the sector. The move marks a key step for the solar industry to shift from self-discipline initiatives toward institutionalized and standardized management.