The home energy storage system uses solar power generation devices on the roof, household wind generators to generate energy, and low-cost power sources in the social power supply system to store affluent electricity in the energy storage system for use during peak hours. It can not only be used as an emergency power supply, It can save electricity expenses for the family. In addition to being used for home use, it can also be used for field operations, emergency power outages, and general household appliances, computers, lighting, and communication equipment.
Analysis of the Status Quo of the Home Energy Storage System Industry
The global household energy storage market size in 2020 is 7.5 billion U.S. dollars, and the Chinese market is 1.337 billion U.S. dollars, equivalent to 8.651 billion yuan. In 2027, it is expected to reach 26.4 billion U.S. dollars and 4.6 billion U.S. dollars respectively. In Germany, regardless of cities or villages, photovoltaic panels can be seen everywhere on the roofs and exterior walls of buildings. In the basement of these buildings, there is often a device the size of a refrigerator - a home battery energy storage system. The installed capacity of this type of system is generally below 10 kilowatts, which can meet most of the power needs of ordinary households.
Smart home energy storage system mainly refers to the energy storage system installed on residential buildings. Its operation mode includes independent operation, supporting operation with small wind turbines, rooftop photovoltaic and other renewable energy power generation equipment, and household heat storage equipment. Smart home energy storage system Applications include: electricity bill management, electricity cost control, power supply reliability, access to distributed renewable energy, and electric vehicle energy storage applications.
The smart home energy storage system adopts an integrated home appliance design, is exquisite and beautiful, and is easy to install. It can supply electricity for residences, public facilities, and small factories. Adopting the design concept of integrated micro-grid, it can operate in off-grid and grid-connected dual modes, and can realize seamless switching of operation modes, which greatly improves the reliability of power supply; it is equipped with a flexible and efficient management system, which can be based on grid, load, energy storage and Adjust the operation strategy of electricity price to realize the optimization of system operation and the maximization of user benefits.
According to the "2022-2027 Global Household Energy Storage System Industry Market Status Survey and Investment Prospect Forecast Analysis Report" released by Zhongyan Puhua Industry Research Institute:
The smart home energy storage system is similar to a micro energy storage power station, and its operation is not affected by the pressure of the city's power supply. During the off-peak time of electricity consumption, the lithium-ion battery pack in the home energy storage system can charge itself for backup power peak or power outage. In addition to being used as an emergency power supply, the smart home energy storage system can also save household electricity costs because it can balance the electricity load.
According to data, in 2018, China's household energy storage supply scale was 7.899 billion yuan. In 2019, China's household energy storage supply scale was 8.961 billion yuan. In 2020, China's household energy storage supply scale was 10.483 billion yuan, a year-on-year growth rate of 16.98%.
The basic task of energy storage systems is to overcome temporal or local differences between energy supply and demand. This difference is caused by a sudden change in energy demand, that is, there is a peak load problem. The energy storage method can play a role of adjustment or buffer when the load change rate increases. At present, due to the cost of energy storage equipment and other reasons, large-scale energy storage has not yet been popularized, and there are relatively many distributed energy storage projects.
With the active response of power generation groups in various places, the number of renewable energy allocation lithium battery energy storage projects has increased sharply. At the same time, the household energy storage market in Europe and the United States has maintained a sustained and rapid growth trend. MW-level centralized wind and solar power station energy storage facilities have accelerated, stimulating a large number of domestic energy storage exports. my country's home energy storage lithium battery shipments continue to grow, reaching 5.5GWh by 2021, a year-on-year increase of 83.3%.
According to the latest data from the German Energy Storage Association, in terms of households, more than 300,000 households in Germany have installed battery energy storage systems, with an average installed capacity of about 8.5 kilowatts. By the end of 2020, nearly 70% of household solar power generation installations in Germany have been equipped with battery energy storage facilities, and the installed capacity of German household energy storage systems is about 2.3 GW.
As the cost of home storage continues to decrease, Wood Mac expects the economics and market growth of home storage to continue to improve. However, the UK and France are far from reaching this economic tipping point for home storage systems. Both countries are hampered by the cost of home storage (measured per kWh) and unfavorable or undeveloped storage frameworks that will not achieve grid parity until 2024, but home storage is expected anyway will increase deployment.
Benefiting from the continuous decline in battery costs and the stimulation of government policies, my country's energy storage batteries will achieve a new installed capacity of 5.8GWh in 2021 on the basis of the newly installed capacity of 0.3GWh put into operation in 2017. While COVID-19 has affected most of the world's economies, it has had less of an impact on home energy storage. According to statistics, China's home storage lithium battery shipments will reach 5.5GWh in 2021, a year-on-year increase of 83%.
Investment Prospect Forecast of Home Energy Storage System Industry
Home energy storage systems are currently divided into two types, one is grid-connected home energy storage systems, and the other is off-grid home energy storage systems. The grid-connected home energy storage system consists of five parts, including: solar cell array, grid-connected inverter, BMS management system, battery pack, and AC load. The system adopts hybrid power supply of photovoltaic and energy storage system. When the mains is normal, the photovoltaic grid-connected system and the mains supply power to the load; when the mains is cut off, the energy storage system and the photovoltaic grid-connected system jointly supply power.
The "Guiding Opinions on Accelerating the Development of New Energy Storage" issued by the National Development and Reform Commission and the Energy Administration proposes that by 2025, the transformation of new energy storage from the initial stage of commercialization to large-scale development will be realized, and the installed capacity will reach more than 30 million kilowatts. , to realize the comprehensive market-oriented development of new energy storage.