is communicated to the wind farms for action in terms of battery placement control then returns to block 102 to continue the battery monitoring as their battery capacities degrade over time optimizing and maximizing the useful lifetime of wind farm batteries may provide significant economic benefits batteries typically represent a large capital investment and often represent a large fraction of the overall cost of a wind farm the monetary value of power produced by a wind farm may be enhanced by optimizing battery scheduling because storage capacities are better matched with applications of different functional storage requirements in order to simultaneously optimize battery lifetime and wind farm power economic value the bhsma 72 may be used to allocate batteries to serve in different applications taking into account among other items the degradation in battery capacity to assist with this allocation process sensors may be deployed that measure battery capacity and supply those readings at regular intervals to the bhsma 72 at each appropriate control interval the supervisory controller 60 reallocates the batteries across multiple wind farms or within a wind farm to optimize scheduling based on predicted future functional requirements and projected battery condition with reference to fig7 and 8 in which like reference numerals refer to like features in fig6 and in accordance with an embodiment of the invention wind farm 44 includes both batteries 50 52 but each of the batteries 50 52 serves.