In a shade system with a bracket supporting a shade storage roll, an anti-reversible power spring apparatus includes at least one biasing system connected with the storage roll wherein the biasing system includes a biasing member with a first end and a second end wherein the first end moves with the storage roll as the storage roll rotates and wherein the second end is held stationary with reference to the storage roll when the storage roll rotates in one direction but not when the storage roll rotates in a second direction. A support for the at least one biasing system is provided wherein the support includes a protrusion that holds the second end against movement when the storage roll is rotated in the one direction but which allows passage of the second end past the protrusion when the storage roll is rotated in the second direction.