Energy storage batteries are necessary in home solar power generation systems. Here are some of the main reasons:

1. Energy independence: Solar power systems can provide clean, renewable electricity to homes by converting solar energy into electricity. However, solar power generation is unstable because it is affected by sunlight intensity, weather conditions and seasonal changes. Energy storage batteries can store excess solar energy for use when solar energy is unavailable or insufficient, making the home self-sufficient.

2. Savings on electricity bills: Energy storage batteries allow households to store solar energy during periods of high electricity prices, such as peak electricity prices, and use the stored energy when electricity prices are lower or solar energy is unavailable. This optimizes energy use and reduces household electricity bills.

3. Grid failure backup: In traditional solar power generation systems, when the grid fails, the system will also stop working to ensure safety. However, if a home has an energy storage battery system installed, it can continue to provide power to the home when the power grid fails, improving the home's power supply reliability and emergency backup capabilities.

4. Smooth power fluctuations: Solar power systems are affected by changes in sunlight, causing fluctuations in power output. Energy storage batteries can smooth these power fluctuations, provide stable power output and reduce dependence on the grid.

5. Environmentally friendly: Energy storage batteries can help households reduce dependence on traditional power grids and reduce the use of fossil fuels, thereby reducing greenhouse gas emissions and reducing negative impacts on the environment.