In order to ensure 24-hour power output and reduce costs, American hotels have installed multiple energy storage batteries and inverters on each floor, which greatly reduces the hotel's operating costs.
In areas where power is often unstable, the Dawnice battery has been a lifesaver! I purchased a 5kWh wall-mounted battery and have been using it for three months. It charges quickly, discharges steadily, and has easily covered my household power needs. My neighbors are now interested in getting one too.