How To Choose The Suitable Energy Storage Battery For The Home Energy Storage System?

The home energy storage system is a solution for home power supply provided by distributed photovoltaic and wind power generation. It can effectively realize energy conversion and storage, solve the problem of imbalance between distributed power generation and load, and improve renewable energy power generation. It will achieve stability and utilization rate, realize "spontaneous self-use" on the user side and save electricity costs.

If you can cooperate with an excellent battery management system to ensure that the life of the home energy storage system can reach more than ten years, it is particularly important to choose the appropriate energy storage battery and type according to the following considerations.

Choose the right battery type

There are many types of batteries. Among them, lead-acid batteries and lithium batteries are currently the most widely used types. However, as the cost of batteries decreases, lithium batteries have become the choice of more people.

Lead-acid batteries are chemical energy storage devices that use lead and lead dioxide as the battery's negative and positive active materials and dilute sulfuric acid as the electrolyte. At present, because of its low initial cost, lead-acid batteries are widely used in projects that require lower charging and discharging frequency, such as backup power supplies for communication base stations.

At the same time, due to the low capacity density of lead-acid batteries, short battery life, high self-discharge rate, and low cycle life, lead-acid batteries have gradually reduced their proportion in energy storage applications and electric vehicles.

Lithium batteries use lithium metal or lithium alloy as the negative electrode material and use non-aqueous electrolyte solutions. They have many advantages such as high energy, long service life, and lightweight. They are widely used in energy storage power systems such as water power, thermal power, wind power, and solar power stations.

Compared with lead-acid batteries, lithium batteries have the advantages of high efficiency, long cycle life, accurate battery data, and high consistency. With the development of battery technology and the rapid decline in cost, lithium batteries have become the mainstream choice in household energy storage projects, and the market share of new chemical batteries has reached more than 95%.

Choose battery capacity according to actual use

The battery design ideas in different application scenarios are different. Normally, there are three common application scenarios: spontaneous self-use (higher electricity costs or no subsidies), peak and valley electricity prices, and backup power sources (the grid is unstable or has important loads).

(1) Spontaneous self-use

Choose to select the battery capacity according to the average daily power consumption (kWh) of the household (the default photovoltaic system has sufficient energy).

(2) Peak and valley electricity price

Calculate the maximum demand value of battery capacity based on the total power consumption during the peak period. Then find an optimal battery power in this interval according to the capacity of the photovoltaic system and the benefit of investment.

(3) Standby power supply

Among them, the total power consumption when off-grid and the estimated time off-grid are the most critical parameters. The required battery capacity is finally determined according to the largest electrical load power and power consumption during the longest continuous power outage period throughout the day.

The household energy storage system designed and manufactured by RENON selects high-quality lithium iron phosphate battery packs and adopts a large battery capacity design, which provides a certain degree of protection in terms of performance and service life. If you want to know more about household energy storage after reading the above, please contact us for a comprehensive solution.

With excellent R&D capabilities, we have become one of the leading manufacturers of lithium battery energy storage systems. We have a number of invention patents and have established a complete quality inspection system to provide customers with high-quality and safe products. We always provide customers with safe, light, and durable green energy products with the most attentive service. If you want to buy our home energy storage system, please contact us immediately!

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