Capacitor energy storage cost per kilowatt-hour

What is the cost per kW of a 250 kW DC capacitor?

Ioxus energy provided details about their 250 kW DC capacitor and stated that the entire system cost is $40,000, corresponding to $160/kW. Given the low specific energy and energy density of ultracapacitors, they are not competitive on a $/kWh basis with battery technologies.

How do ultracapacitors compare to batteries on a \$/kW power level?

On the $/kW power level, ultracapacitors are more competitive with battery technologies due to their high specific power and power density. Given the low specific energy and energy density of ultracapacitors, they are not competitive on a $/kWh basis with battery technologies.

What is the cost of a 1,000 kW power system?

Maxwell provided a cost of $241,000 for a 1,000 kW/7.43 kWh system, while a 1,000 kW/12.39 kWh system cost $401,000 (Garcia 2018). On the $/kW power level, flow batteries are more competitive due to their high specific power and power density.

What is the cost of a 1,000 kW/12.39 kWh system?

A 1,000 kW/12.39 kWh system cost $401,000. Maxwell provided a cost of $241,000 for a 1,000 kW/7.43 kWh system, while a 1,000 kW/12.39 kWh system cost $401,000 (Garcia 2018).

What are the capital costs for battery systems?

Capital costs for all battery systems are presented for battery capital and management systems (expressed in terms of $/kWh). Other costs include balance of plant (BOP) ($/kW), power conversion systems (PCS) ($/kW), and construction and commissioning (C&C) ($/kWh). PCS costs are estimated to be the same across all battery technologies except Li-ion.

What is the lowest annualized cost per kW?

On an annualized basis, Li-ion has the lowest total annualized $/kWh value of any of the battery energy storage technologies at $74/kWh, and ultracapacitors offer the lowest annualized $/kW value of the technologies included.