DNO Approval for Solar: What It Is and Why It Matters

Distribution Network Operator (DNO) approval is a vital safety process that ensures your solar installation integrates seamlessly with the local power grid without destabilizing the neighborhood supply. While standard domestic systems under 3.68kW typically only require a post-installation notification (G98), larger or more complex arrays necessitate prior “G99” permission, which can take four to eight weeks to process. This regulatory step is essential for securing your ability to export surplus energy and qualify for payments, yet it is a technical hurdle that homeowners rarely need to navigate alone.