Built-in power supplies

What would it be like to have excess electricity and use it when needed? It sounds like a great prospect! And it could be even better, because you can also resell it! This is possible thanks to your own energy storage, which is why more and more people are thinking about it. In times when electricity costs are rising rapidly and the market itself is unpredictable, this is indeed a good option. Increasing environmental awareness also plays a role here. Let's find out how you can legally resell energy from an energy storage facility? What conditions must be met?