Plugging in a solar panel feels like a one-person job. It isn't, quite. There's one phone call or form you have to complete, and it's not optional.
What is a DNO?
A DNO is a distribution network operator. It's the company that owns and runs the electricity wires and cables in your area. It's not the same as your energy supplier, the company that bills you. Your DNO is set by where you live, not by who you choose.
Do I really have to tell them?
Yes. Every compliant plug-in solar product must carry a statement: telling your DNO about connection and disconnection is required. It must also link to instructions on how to do it. This sits in UK law and the product spec together, not as a suggestion.
When do I need to notify them?
Twice, not once. You tell your DNO when you connect the device. You tell them again if you ever disconnect it for good. That way your DNO always has an accurate picture of what's feeding into the grid on your street.
Is this the same as the kit being "approved"?
No, and this trips people up. A maker must register a plug-in solar device on the ENA Type Test Register before selling it. That's about the product itself. Telling your DNO is a separate step you do yourself, about your own connection. Both steps are required.
The quick version
- Telling your DNO is required, not a suggestion.
- You must tell your DNO on connection and again on disconnection.
- It's separate from the kit's own ENA register listing.