Residential energy storage system (Residential ESS) is a device used to store electricity generated by household solar panels or other renewable energy sources. Its main function is to improve the self-sufficiency of households, reduce energy costs, and also serve as an emergency backup power source to provide necessary electricity support in case of emergencies.

So, what are its advantages and disadvantages?

Advantages:

1. Energy saving and emission reduction: Residential ESS can store excess electricity in batteries, which not only reduce the demand for the power grid, but also reduce the use of traditional energy sources such as coal, which is beneficial for reducing carbon emissions.

2. Green environmental protection: promoting the utilization of renewable energy and improving environmental quality.

3. Self sufficiency: Residential ESS can can make the family self-sufficient and no longer completely dependent on the power grid, which increases the energy independence of the family.

4. Reduce electricity bills: By purchasing electricity during off peak hours and using battery stored electricity during peak hours, the family can save the electricity bill to the maximum extent.

5. Emergency backup: In the event of a power outage in the grid, residential ESS can provide backup power to the family and maintain basic electricity needs.

Disadvantages:

1. High cost: The installation cost is relatively high and requires a certain investment.

2. Limited lifespan: The battery has a limited lifespan and needs to be replaced regularly, which may increase system maintenance costs.

3. Installation requires professional skills: Installing residential ESSs requires professional skills and knowledge. Improper installation may cause damage or safety hazards to the building's electrical circuits.

4. Limited capacity: Due to the limited capacity of the battery pack, it is unable to store a large amount of electrical energy, which may result in the inability to meet household electricity needs during high load demands.