When your home battery is empty, it means there is no stored energy available in the battery. In this case, your home will likely rely on other energy sources, such as the power grid, solar panels, or another form of energy generation. Here are some possible scenarios:

1. Back to the power grid: If your home battery is empty, your house will likely receive electricity from the public power grid again. Your electricity consumption will be supplemented by the grid, just as before the installation of the home battery.

2. Solar panels: If you have solar panels installed, your house will rely on the energy being generated by the solar panels at that time. During sunny hours, the energy will be directly routed from the solar panels to your home. If there is no direct energy generation (for instance, at night or on cloudy days), your home will switch to the power grid.

3. Additional energy sources: Besides the power grid and solar panels, your house can also utilize other energy sources, such as a generator or wind turbines, if you have them installed. These sources can supplement the energy needs of your home when the home battery is empty.

It is important to keep a close eye on the energy balance in your home and ensure that you have enough energy sources to meet your needs, especially when the home battery is empty. A well-integrated energy system can help guarantee a reliable and uninterrupted power supply.