Supercapacitors: the economics?
The costs of supercapacitors are tabulated in this data-file, with a typical system storing 15-seconds of electricity, for a capex cost around
The market sizing and forecasts are revenue-based (USD Million/Billion), with 2024 as the base year. The global supercapacitors market size was estimated at USD 2.94 billion in 2024 and is predicted to increase from USD 3.45 billion in 2025 to approximately USD 14.74 billion by 2034, expanding at a CAGR of 17.50% from 2025 to 2034.
The capex costs of supercapacitors are contrasted with the costs of lithium ion batteries and the costs of flywheels in the chart below. A typical supercapacitor stores about 15 seconds of energy, for a capex cost of $10,000/kWh, but just $40/kW of power.
The supercapacitors market is valued at USD 0.54 billion in 2025 and is projected to double to USD 1.09 billion by 2030.
In 2023, the average supercapacitor energy storage system ranged between $3,000-$5,000 per kWh – significantly higher than traditional batteries. But why does this gap exist, and when will it close? Unlike batteries that rely on chemical reactions, supercapacitors store energy electrostatically.
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