SLOVENIA PHOTOVOLTAIC AND WIND POWER GENERATION SYSTEMS
Major commercial projects now deploy clusters of 15+ systems creating storage networks with 80+MWh capacity at costs below $270/kWh for large-scale industrial applications.
When the energy storage system lifetime is of 10 years, and the cost is equal to or more than 375 $/kWh, the optimization configuration capacity is 0 MWh, which means no energy storage installation. The annual revenue of the simulated wind-storage system is 12.78 million dollars, which is purely from the sale of wind generation.
The revenue of wind-storage system is composed of wind generation revenue, energy storage income and its cost. With the TOU price, the revenue of the wind-storage system is determined by the total generated electricity and energy storage performance.
Overall, big projects can approach the low end of wind's cost range (often cited around $1 million per MW globally, roughly €0.9M/MW, in best cases). According to a Polish energy analysis, a wind farm has an average cost of PLN 5–6 million per MW (€1.1–€1.3M/MW) in 2025, compared to PLN 2.8–3.5M/MW for a solar farm.
The energy storage plant cost is set as 150, 225, 300, 375 and 450$/kWh respectively. The energy storage plant's optimum capacity of for a wind generation is calculated considering energy arbitrage, so is the annual benefit of wind-storage coupled system with the optimal capacity.
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