ELI5: Explain Like I'm 5

Battery-to-grid

Battery-to-grid is when you use batteries to store extra electricity from your home. Instead of the electricity just being wasted, you can store it in the batteries and then use it later when you need it. It’s like having an extra ‘tank’ of electricity that you can use when you run out. When you need to use it, you can just take the stored electricity from the batteries and put it back into your home.