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Due to the large capacity of installed hydroelectric and thermal storage systems and the resilience of the Spanish power grid, the need for Battery Energy Storage Systems (BESS) in Spain has been relatively low. The lack of a clear regulatory framework for BESS has also hindered its development in Spain so far.
The market energy storage in Spain, particularly in relation to the BESS systems (Battery Energy Storage Systems), is undergoing a dynamic and accelerated evolution. This transformation is driven by the growing need to integrate renewable energy sources into the electricity grid, improve supply stability and optimize energy use.
When it comes to installed energy storage capacity in general, Spain is one of the leading countries within Europe (see figure 2). Currently, Spain has 6.3GW of hydroelectric and 1GW of thermal storage capacity installed. In fact, the non-BESS storage capacity in Spain is higher than in any other European country.
Spain's battery storage market is dominated by customer-sited systems. Utility-scale storage remains nascent. Currently, Spain's storage market is mainly composed of small-scale batteries co-located with solar PV. Spain's household electricity prices now stand at over EUR 0.30/kWh on average.
The price is the expected installed capital cost of an energy storage system. Because the capital cost of these systems will vary depending on the power (kW) and energy (kWh) rating of the system, a range of system prices is provided. 2. Evolving System Prices
In 2025, the typical cost of commercial lithium battery energy storage systems, including the battery, battery management system (BMS), inverter (PCS), and installation, ranges from $280 to $580 per kWh. Larger systems (100 kWh or more) can cost between $180 to $300 per kWh. How does battery chemistry affect the cost of energy storage systems?
In 2025, the typical cost of a commercial lithium battery energy storage system, which includes the battery, battery management system (BMS), inverter (PCS), and installation, is in the following range: $280 - $580 per kWh (installed cost), though of course this will vary from region to region depending on economic levels.
In understanding the full cost implications of grid energy storage technologies, the 2024 grid energy storage technology cost and performance assessment pays special attention to operational and maintenance costs. These ongoing expenses can significantly impact the long-term viability and cost-effectiveness of storage solutions.
The 2020 Cost and Performance Assessment provided installed costs for six energy storage technologies: lithium-ion (Li-ion) batteries, lead-acid batteries, vanadium redox flow batteries, pumped storage hydro, compressed-air energy storage, and hydrogen energy storage.
To determine the total project costs for the Li-ion battery technology, for example, we take the product of the capital and C&C costs and its energy capacity (4,000*$372). We then add that value to the product of the PCS and BoP costs and the unit's power capacity (1,000*$388).
The assumptions listed in Table 5.1were adapted from a battery storage project located in the Pacific Northwest. It is believed that these are adequately representative of a typical storage system within the United States. Figure 5.1 shows an example input for an energy storage technology using the parameters described in Section 4.0.
Aquino et al. (2017) placed the value in a tighter range at $340–$450/kWh for a 4 MW/16 MWh Li-ion NMC system and a fully installed cost estimate of between $9.1 million and $12.8 million. They also provide price estimates for LFP and LTO systems at $340–$590/kWh and $500–$850/kWh, respectively.
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