How much does electricity cost per kW?

According to the International Renewable Energy Agency (IRENA 2012), the cost per kW for electrical and mechanical equipment decreases with increasing power. It is estimated to be $570/kW for a 4 MW system, $485/kW for a 48 MW system, and $245/kW for a 500 MW system. There appears to be an inflection point at ~ 50 MW.

What is the cost of a power system?

The cost of a power system can vary. According to a Department of Energy report, the cost of control and communication (C&C) for the system is predicted to be between $150–$180/kW. In comparison, PowerTech Systems (2015) estimated a cost of $183/kW for a 100-kWh system.

Why is discharged electricity more expensive than pure electricity?

For all technologies which use only electricity in the discharging process (as opposed to dCAES systems, which use also gas), the cost of discharged electricity is therefore higher than the cost of pure electricity storage plus the cost of charged electricity. The overall efficiency of the plant needs to be taken into account as well.

What are the units of energy and power costs?

For each technology, unit energy and power costs were obtained from literature and/or vendors. Battery costs were available from vendors, supplemented by literature, in terms of $/kWh, while ultracapacitor costs provided by vendors were in both $/kW and $/kWh.

What are energy related costs?

Energy related costs include all the costs undertaken to build energy storage banks or reservoirs, expressed per unit of stored or delivered energy (€/kWh). In this manner, cost of PCS and storage device are decoupled to estimate the contribution of each part more explicitly in TCC calculations.

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.