I. Working Principles and Core Values of Home Energy Storage Systems

Home energy storage systems typically consist of a battery pack, inverter, battery management system (BMS), and intelligent monitoring system. Their core function is to store electricity and release it when needed.

When combined with a photovoltaic system, they can store electricity generated by solar panels during the day and supply it at night or on cloudy days. In areas with time-of-use electricity pricing, they can charge during low-price periods and discharge during peak periods, thereby saving on electricity costs.

II. How to Choose the Right Energy Storage System Capacity

Choosing the right energy storage system capacity is a critical decision, determined based on a household's actual electricity usage:

Small-medium capacity (1-5kW): Suitable for households with daily electricity consumption below 10kWh, primarily providing emergency backup power for basic lighting, refrigerators, mobile phone charging, and other needs. These systems are compact and flexible to install.

Medium-high capacity (5-10kW): Suitable for a family of three with an average daily electricity consumption of 10-20kWh. They can run medium-power appliances like air conditioners and water heaters for several hours. This is the current mainstream choice.

Large capacity (10-20kW): Suitable for large apartments, villas, or households with multiple appliances, with an average daily electricity consumption exceeding 20kWh,

ensuring the normal operation of all appliances during a power outage.

It is recommended that the energy storage capacity cover 30%-50% of a household's daily electricity consumption. You can estimate the required system power by calculating the total power consumption of all appliances used during peak hours.

III. Battery Technology: Lithium Iron Phosphate Becomes Mainstream

Currently, home energy storage systems primarily utilize the following battery technologies:

Lithium iron phosphate (LFP) batteries: These have become the mainstream technology for home energy storage, typically boasting a cycle life exceeding 3,000 cycles, high thermal stability, and excellent safety, resisting runaway even at high temperatures. They offer energy densities up to 120 Wh/kg and volumetric energy density up to 210 Wh/L.

Lead-carbon batteries: These offer excellent low-temperature performance (dischargeable down to -20°C), but have low energy density and are suitable for cold northern regions.

Sodium-ion batteries: These are an emerging technology with low cost, but their cycling stability still needs to be verified.

Lithium iron phosphate batteries, due to their safety and long lifespan, have become the preferred technology for home energy storage.

IV. System Composition and Key Technical Parameters

A complete home energy storage system consists of the following core components:

Battery Pack: Energy storage unit, typically using a 51.2V voltage level.

Inverter: Responsible for converting DC to AC power. Grid-connected systems also require grid monitoring and safety isolation.

BMS: Battery Management System: Monitors battery status and provides protection against overcharge, over-discharge, and temperature fluctuations.

Smart Monitoring System: Displays real-time data such as voltage, temperature, and SOC (State of Charge) via a mobile app or local display.

Safety Protection: Three-Level Protection Mechanism

A high-quality home energy storage system should feature multiple safety features:

Cell-level: Each cell is equipped with a temperature sensor, which triggers active balancing when an abnormality occurs.

Module-level: Dual protection with fuses and relays automatically isolates faulty modules.

System-level: A perfluorohexanone fire extinguishing device is installed, with a response time of ≤30 seconds.

Choosing products certified by CE, IEC62619, and UN38.3 offers greater assurance.

Conclusion

In summary, choosing the JTHOUSE SOALR home energy storage system is a wise choice. The 20kW system, powered by lithium iron phosphate technology, is currently an ideal choice for villas and large homes, while small and medium-capacity systems are suitable for ordinary households.

In the future, as technology advances and costs decrease, home energy storage systems will evolve from single storage devices to intelligent energy hubs, providing core support for building zero-carbon homes.