renewable energy equipment; valuation; depreciation

HB 2918 changes how renewable energy and storage equipment is valued for property tax purposes in Arizona through 2040. It sets different valuation rules: non-utility-owned equipment is taxed at 100% of its depreciated cost, while utility-owned equipment is taxed at 20% of depreciated cost before January 1, 2027, and 100% after that date. The bill caps depreciation at 90% of the equipment's original cost and explicitly includes all energy storage (both co-located with solar/wind and standalone). This directly affects owners of renewable energy projects, including utilities and private developers, by altering their property tax burden based on ownership type and installation timeline.