Wall-mounted batteries, also known as home energy storage systems, are rechargeable batteries that are designed to store excess energy generated by solar panels or other renewable energy sources for use at a later time. They are mounted on a wall in a building and are connected to the power grid and the renewable energy generator.

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 applications：

1. Backup power: In the event of a power outage, wall-mounted batteries can provide backup power to critical appliances and systems until power is restored.

2. Load shifting: By storing excess energy during low-demand periods, wall-mounted batteries can be programmed to release the stored energy during high-demand periods, reducing peak-time energy costs.

3. Grid stabilization: Wall-mounted batteries can help to stabilize the grid by providing stored energy during periods of peak demand or power outages.

4. Time-of-use optimization: By storing energy during low-cost periods and releasing it during high-cost periods, wall-mounted batteries can help to optimize energy costs for homeowners and building owners.

key function：

The function of wall-mounted batteries is to store the excess energy generated by a solar panel or other renewable energy generator during the day, which can then be used to power a home or building at night or during periods of low sunlight. By using stored energy, building owners and homeowners can reduce their reliance on the grid and lower their electricity bills.