The cost of an energy storage system varies considerably depending on its scale, technology, application scenario, and configuration. Currently, the equipment procurement cost of mainstream electrochemical energy storage systems has entered the "0.5 yuan/Wh" era. However, the comprehensive cost throughout the entire lifecycle needs to be evaluated from multiple dimensions, including construction, operation and maintenance, and revenue.
The following are the cost breakdown and reference prices for different types of energy storage systems:
Cost Estimation by System Scale
Residential/Small-scale Energy Storage Systems (10kWh level)
Suitable for residential or small-scale commercial scenarios, such as off-grid PV + energy storage:
Equipment Cost: Approximately 50,000~80,000 RMB
Includes lithium batteries (lithium iron phosphate), inverters, controllers, distribution boxes, etc.
Based on a 10kWh capacity, the unit price is approximately 0.5~0.8 RMB/Wh.
Real-world example: A 3kW PV + 10kWh lithium battery system has a total investment of approximately 107,000 RMB (including wiring, installation, etc.), with a net expenditure of approximately 84,000 RMB after deducting the cost of recycled old batteries.
Industrial and Commercial Energy Storage (1MW/2MWh~4MWh level)
Main application scenarios, used for peak-valley arbitrage and demand management:
Core Equipment Cost: Approximately 0.5 RMB/Wh
The equipment purchase price for a 1MW/4MWh system (4000kWh) is approximately... 2 million RMB
Supporting and Engineering Costs:
Temperature Control/Fire Protection: 200,000-400,000 RMB
Civil Engineering and Installation: 100,000-200,000 RMB
Grid Connection: 200,000-800,000 RMB (depending on voltage level)
Design and Supervision: 60,000-100,000 RMB
Total Comprehensive Cost: 2.5-3.4 million RMB (1MW/4MWh system)
Large-Scale Energy Storage Power Station (Hundreds of MWh Level)
Suitable for New Energy Distribution and Storage, Grid-Side Peak Shaving:
System Integration Price: Domestically reduced from 1.4 RMB/Wh to 0.6-0.7 RMB/Wh (2024)
Levelized Cost of Electricity (LCOS): Generally between 0.30-0.40 RMB/kWh (calculated based on 3000 cycles and 80% depth of discharge)
