In the UK, whether you need a Distribution Network Operator (DNO) application for battery storage depends on the size and specifications of your system, as well as its intended use.
For small-scale, domestic battery storage systems that are connected behind the meter and primarily for personal use, you often don’t need to make a formal application to the DNO.
However, if the system is large, intended for commercial use, or if you plan to export a significant amount of electricity back to the grid, you may need to apply for permission.
