Key Takeaways

• Total electricity cost with solar and storage is projected at USD 76/MWh.
• Levelized cost of storage (LCOS) is estimated at USD 65/MWh, influenced by lower equipment prices and improved financing.
• Integrating solar with storage offers a sustainable path for countries with rising energy demands, particularly in regions with strong solar resources.

Understanding Cost Dynamics in Solar Energy

Recent analysis from Ember reveals that converting inexpensive daytime solar power into a more usable format leads to a projected electricity cost of USD 76/MWh. This figure is determined by the European and global markets, particularly focusing on recent auctions in Italy, Saudi Arabia, and India, with a robust emphasis on expert insights.

To develop long-duration utility-scale battery energy storage systems (BESS) outside of China and the United States, an average total capital expenditure (capex) of around USD 125/kWh is necessary. This total includes USD 75/kWh for importing core equipment from China and USD 50/kWh for installation and connections.

The analysis also highlights a levelized cost of storage (LCOS) of USD 65/MWh, which reflects the cost of transferring electricity from peak daytime generation to evening use. This low LCOS stems from cheaper battery technologies, longer lifespans, increased efficiencies, and reduced financing costs, primarily due to clearer revenue strategies like auction systems.

To utilize 50% of daytime solar energy during nighttime, an additional USD 33/MWh is added to the solar cost, based on the International Renewable Energy Agency (IRENA)’s projected average solar price of USD 43/MWh for 2024. However, achieving a fully dispatchable solar energy system requires overbuilding solar generation capacity and enhancing battery storage to ensure coverage during cloudy periods and seasonal lows.

Kostantsa Rangelova, a Global Electricity Analyst at Ember, notes that a significant drop in battery equipment costs—over 40% in 2024 alone—indicates a shift in economic feasibility for solar power. Rangelova emphasizes that solar energy is evolving from being a source of cheap daytime electricity to a reliable, anytime dispatchable energy source, which could fundamentally change energy dynamics in regions with increasing energy demands.

The analysis also references the International Energy Agency (IEA)’s World Energy Outlook, projecting that 80% of global energy demand growth in the coming decade will occur in regions with favorable solar conditions. For these areas, combining solar power with storage represents the most cost-effective strategy to meet emerging energy needs, enhance energy security, and reduce reliance on imported fossil fuels.

This transition to dispatchable solar power, costing USD 76/MWh, proves to be more economical and quicker than constructing new gas power plants, particularly for countries depending on expensive liquified natural gas (LNG) imports. Furthermore, the implementation of BESS is anticipated to stimulate the development of clean industries. Notably, even when importing core BESS components, around 40% of total project value remains within local economies through various engineering and construction activities.

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