Household energy storage systems are becoming increasingly important for stability during power outages, reducing electricity bills through peak-valley pricing, and supporting clean energy use. These systems store excess renewable energy and supply power during high-demand or outage periods, saving costs and promoting sustainability. As adoption grows, ensuring the systems are safe, smart, and efficient is crucial for their integration as common household appliances.
Why We need to use the Household energy storage system
In today's era of rapid technological change and accelerated energy transition, home energy storage battery systems are quietly entering the public's field of vision and gradually becoming the focus of attention of many families. Have you ever had a power outage on a hot summer day, with your air conditioner at home out of service and your refrigerator at risk of spoilage, and you have no choice but to endure the scorching heat and anxiously wait for the power to be restored? Are you aware of the rising numbers on your monthly electricity bills and are eager to find ways to save energy and money? The home energy storage battery system may be the key to solving these problems.
In recent years, with the acceleration of the global energy structure transition to renewable energy, clean energy such as solar energy and wind energy has become more and more widely used in the field of household electricity. However, these clean energy sources are limited by natural conditions and have the problem of unstable power generation, such as solar energy is only available during the day, and wind energy is uncertain, which makes the demand for household energy storage increasingly urgent. At the same time, in order to promote the development of green energy and reduce the pressure on power grids, governments around the world have introduced encouraging policies to inject strong impetus into the home energy storage battery system market.
According to data from market research institutions, the global home energy storage system market has shown rapid growth in the past few years. In 2023, the global home energy storage system market sales reached $8.74 billion and is expected to soar to $49.86 billion in 2029, growing at a CAGR of 33.68%. In some developed countries in Europe and the United States, the penetration rate of home energy storage systems is steadily increasing. Taking Germany as an example, as a leader in European household energy storage, a large number of households in China have installed energy storage equipment, which not only effectively improves the energy self-sufficiency rate, but also makes a significant contribution to alleviating the peak pressure of the power grid. In the United States, due to factors such as fluctuating energy prices and the increased risk of power outages due to frequent natural disasters, more and more households are choosing to equip energy storage battery systems to ensure the stability and security of power supply.
What is the Household Energy Storage System
(1) The composition of the system is revealed
The home energy storage battery system is like a delicate and complex "energy cube", which is composed of multiple core components working together.
As the "heart" of energy storage, the battery shoulders the important task of storing and releasing electrical energy. At present, lithium-ion batteries have become the mainstream choice of home energy storage batteries due to their significant advantages such as high energy density, long cycle life, and low self-discharge rate. Tesla's Powerwall, for example, uses lithium-ion battery technology to provide stable and reliable power support for homes. However, lead-acid batteries have not completely withdrawn from the market, because of their low cost, they are still used in some cost-sensitive home scenarios with relatively small energy storage needs.
The inverter is the "smart brain" of the system, which is responsible for converting the direct current output of the battery into alternating current to adapt to the electricity demand of various household appliances. It can not only realize the two-way conversion of direct current and alternating current, but also has the function of intelligent control, which can flexibly allocate electric energy according to factors such as household electricity load and power grid status. Some of the advanced inverters also incorporate Maximum Power Tracking (MPPT) technology, which allows PV cells to operate near the maximum power point at all times, maximizing power generation efficiency.
The battery management system (BMS) is the "personal bodyguard" of the battery, keeping an eye on the key parameters of the battery such as voltage, current, and temperature. Once the battery is overcharged, over discharged, overheated, etc., the BMS will immediately activate the protection mechanism to ensure the safety and life of the battery. At the same time, it can also make the performance of each cell in the battery pack consistent through equalization technology, so as to avoid the overall performance of the battery pack degrading due to cell differences.
The energy management system (EMS) is like the "commander" of the system, coordinating all aspects of power generation, energy storage, and electricity consumption. It can formulate the optimal energy dispatch strategy based on real-time electricity prices, household electricity consumption habits, renewable energy generation forecasts and other information. For example, during the trough period of electricity prices, command the energy storage system to charge; During peak electricity consumption or power outage, arrange the discharge of energy storage batteries to ensure the stability of household power supply and reduce electricity costs.
(2) The Working Theory of Household Energy Storage System
The working principle of the home energy storage battery system is like an exquisite "energy ball", and all links are closely coordinated and seamless.
On a sunny day, if solar panels are installed in your home, the PV modules will eagerly absorb the sun's rays and convert them into direct current. On the one hand, this part of the direct current flows directly to the inverter, and after being converted into alternating current by the inverter, it supplies power to the electrical equipment running at home to meet the daily electricity demand; On the other hand, the excess DC is fed to the energy storage battery, which is carefully managed by the battery management system, which stores the electrical energy in the form of chemical energy for later use.
When night falls, or when solar power "strikes" in rainy weather, energy storage batteries step up. According to the instructions of the energy management system, the battery management system controls the discharge of the battery in an orderly manner, converts the stored chemical energy into direct current, and then converts it into alternating current through the inverter, so as to continuously supply power to lighting, TV, refrigerator and other electrical appliances at home, ensuring that family life is not affected.
In the trough period of power consumption in the power grid, the electricity price is often more favorable, and the energy management system will issue instructions to let the energy storage battery turn on the charging mode and absorb a large amount of low-cost electricity; When the peak of electricity consumption comes, the electricity price soars, and the energy storage battery is discharged in a timely manner, using the electric energy stored in the battery to supply power to the family, avoiding the high electricity bill and effectively saving electricity costs. In the unfortunate event of a power outage, the energy storage battery system can switch to the emergency power supply mode in an instant, becoming the "power guard" of the family, ensuring the normal operation of key electrical appliances and maintaining the order of life.
What is the advantage when we use the household energy storage system
(1) Ensure the stability of electricity consumption
In daily life, power outages always come unexpectedly and cause us a lot of inconvenience. During the peak hours of electricity consumption in summer, the power grid is overloaded, and in order to ensure the safety of the power grid, some areas have to be switched off and curtailed, and the air conditioning and electric fans at home stop abruptly, and the heat is unbearable; When severe weather such as storms and heavy snowfalls rage, transmission lines are extremely vulnerable, resulting in widespread power outages, refrigerators unable to refrigerate, food at risk of spoilage, lack of lighting, and life in total darkness.
The home energy storage battery system is like a reliable "power guard", which can be quickly activated in the event of a sudden power failure and seamlessly switch to the emergency power supply mode. It can continuously power refrigerators and freezers to ensure that food is as fresh as new; Keep the lighting fixtures bright and dispel the fear of darkness; Enabling medical equipment to function properly and escort family members with special needs; It can also maintain the work of the network router to ensure smooth external communication, so that you can keep abreast of external information and ask for help during power outages. With it, no matter how the outside power fluctuates, life at home is always in order.
(2) Save electricity bills
Nowadays, the peak-to-valley electricity price policy is widely implemented in various places, opening up a new way for households to save energy and money. In one city, for example, the price of electricity is as high as 0.8 yuan per kilowatt-hour during peak hours, while the price is as low as 0.3 yuan per kilowatt-hour during valley hours, with a significant price difference. The home energy storage battery system is like a shrewd "electricity steward", well versed in the way of peak and valley electricity prices.
During the valley power period at night, when the electricity price is at a low level, the system automatically turns on the charging mode to absorb and store a large amount of cheap electricity; During peak hours during the day, when electricity prices soar, the system discharges electricity with precision, using stored electricity to power homes and reducing the use of high-priced electricity. Assuming that an ordinary household consumes 10 kWh of peak electricity and 5 kWh of valley electricity per day, after installing an energy storage system, storing 5 kWh of valley electricity and using it during peak hours, the daily electricity bill can save 2.5 yuan, which is 912.5 yuan in a year. Over the long term, the savings in electricity bills are considerable, which has reduced the burden on the family economy a lot.
(3) Contribute to clean energy
As the global attention to climate change continues to increase, it has become a top priority to reduce carbon emissions and move towards clean energy. Home energy storage battery systems play a key role in this process, becoming the "green engine" of the home energy transition.
When used in conjunction with renewable energy generation equipment such as solar panels and wind turbines, it can properly store the excess electricity generated by these clean energy sources. During the day, the sun is abundant, and the solar panels are important and the remaining part of the power generated is absorbed by energy storage batteries in addition to meeting the immediate electricity demand; At night or on rainy days, when solar power generation is insufficient, energy storage batteries will release electricity to ensure the stability of household electricity. As a result, households are significantly less dependent on traditional thermal power, reducing emissions of carbon dioxide, sulfur dioxide and other pollutants from the combustion of fossil fuels. This not only contributes to mitigating global warming and improving air quality, but also makes family life greener, low-carbon and more sustainable.
Conclusion
The Household Energy Storage system is a good tech for the people’s life and nowadays this products has been known by more and more people in the word, but what essential is we must keep the 100% safety for the system, because it will be like a kind of normal appliances into homes in the future, along with widespread use, we must make it 100% safe, smart, simple, and efficient.
