TL;DR
If you are planning solar panels or a battery, the DNO application is not just admin, it is one of the most important parts of the project because it determines what size system you are allowed to install, how much you can export, whether you might face connection costs, and how your payback stacks up. This guide explains what a DNO application is in the UK, what your Distribution Network Operator looks at, and why local grid capacity can feel first come first served, so you can avoid expensive design mistakes later.
