Household Energy Storage: Market Trends and Applications

Household energy storage, also known as home energy storage, differs from large-scale and industrial-commercial systems, with AC output under 20kW and stored power up to 30kWh. It typically integrates with distributed photovoltaic generation to form a home solar-plus-storage system, providing primary power in underdeveloped grid areas, backup for critical loads like data centers, and replacing lead-acid batteries in communication base stations. Portable units serve outdoor activities and emergency rescue. The European energy crisis, rising electricity prices, the Russo-Ukrainian War, and frequent large-scale blackouts due to weak overseas grids drive demand. Global household storage installed capacity grew 56% year-on-year in 2021, with Europe, the US, Japan, and Australia dominating 90% of the market. Policies like tax exemptions and subsidies in Italy, Germany, and the US further boost adoption. Key applications include peak cutting, valley filling, and emergency power supply.