Home Energy Storage System Cost Proportion Analysis
Description
The following is a cost analysis of each component of a Home energy storage system in US dollars, combined with the latest global market trends in 2025.
1.Cost proportion and price of Key components (USD)
1.1 Battery pack (40% -60%)
Technical selection:The mainstream household energy storage adopts lithium iron phosphate batteries (LFP),By 2025, the cost of batteries in the Chinese market has dropped to $56-84/kWh, a decrease of 30% compared to 2023.
Capacity impact:The battery cost for a 10kWh system is approximately $560-840,while for a 20kWh system it is approximately $1120-1680 without BMS and accessories.
Comparison reference:The cost of ternary lithium batteries is about 70-98 US dollars/kWh, but the household scenario is more inclined towards LFP.
1.2 2. Inverter (20% -30%)
Off grid inverters:5kW models are priced at approximately $420-700, while 10kW models are priced at approximately $840-1400 (6000-10000 yuan).
Hybrid inverter (supporting photovoltaic grid connection):5kW models cost about 700-1120 US dollars, 10kW models cost about 1400-2100 US dollars , and the efficiency can reach over 97%.
Cost proportion:The cost of a 10kWh system inverter is approximately $280-630, accounting for 20% -30%.
2.3 Charging controller (5% -10%)
MPPT controller :The 10A/12V model costs approximately $28-42 , while the 30A/48V model costs approximately $70-112.
Integrated controller:Some inverters are already built-in and do not require additional procurement.
Cost proportion:The cost of a 10kWh system charging controller is approximately 70-140 US dollars.
2.4 Battery Management System (BMS) (5% -10%)
Built into the battery pack, the cost of a 10kWh system is approximately $140-280, depending on the size of the current.
Cost proportion: The BMS cost of a 10kWh system is approximately $70-280, depending on the complexity of the system.
2.5 Monitoring system (5% -10%)
Basic monitoring: including smart meters and data acquisition modules, with a cost of approximately 70-140 US dollars.
Advanced monitoring: supports remote control and energy management, with a cost of approximately $210-420.
Cost proportion: The monitoring cost of a 10kWh system is approximately 70-280 US dollars.
2. Auxiliary components and installation costs
2.1 Installation materials (5% -10%)
Cables and Circuit Breakers: A 10kWh system costs approximately $140-280 ($1000-2000), including copper core cables ($7/meter) and DC circuit breakers ($28/unit).
Bracket and trunking: Approximately $70-140 ($500-1000), depending on the installation method (wall mounted or floor mounted).
2.2 Labor cost (10% -20%)
Installation cost: Approximately 420-840 US dollars for a 10kWh system, including equipment debugging and grid connection, depending on different charging standards in different regions.
2.3 Other expenses
Grid connection cost: Approximately 70-140 US dollars for meter replacement and grid connection.
Taxes and transportation: accounting for approximately 5% -8% of the total cost.
3.Typical System Cost Case (10kWh)
| Parts | Cost Range（USD） |
Proportion |
|---|---|---|
| LFP Battery（10kWh） | 560-840 | 40%-60% |
| Hybrid Inverter（5kW） | 700-1,120 | 20%-30% |
| Charger Controller | 70-140 | 5%-10% |
| BMS | 70-280 | 5%-10% |
| Monitor System | 70-280 | 5%-10% |
| Installation Materials | 140-280 | 5%-10% |
| Labor Costs | 420-840 | 10%-20% |
| Sum | 2,030-3,780 | 100% |
4.Conclusion
Based on the above analysis, the cost structure of household energy storage systems in US dollars has been clearly presented. Users can choose the appropriate configuration according to their own needs and budget, while paying attention to technological iteration and policy dynamics to achieve optimal investment returns.