Panels are the visible part of a solar installation. Much of the important work happens at the consumer unit, at the meter and in the arrangements with the local network, and none of it can be skipped.
The consumer unit
The solar supply is connected to the property through the consumer unit, so its condition matters. The installer needs to know whether it has space for the extra protective device, whether it has the protection the current regulations expect, and whether it is in a fit state to carry on being used. In some properties it can stay as it is; in others it has to be improved or replaced before the system is connected. This is decided by looking at it, not assumed.
Metering
Electricity going into and out of the property is measured. Depending on how the system is set up, that may include a generation meter and a smart meter that records what you send to the grid. If you want to be paid for exported electricity, your supplier’s terms apply, for example under the Smart Export Guarantee, and they can include requirements about how the system is installed and documented. It is worth checking these before you decide on a supplier or a tariff.
The network operator
Every solar system that connects to the network has to be reported to the local distribution network operator. Smaller systems are typically notified after installation. Larger ones need the operator’s approval first, and in some areas the local network has limited spare capacity, which can affect what is allowed. Which route applies depends on the size of the system, so it should be established early, not discovered at the end.
Isolation and labelling
The wiring regulations expect the system to be capable of being isolated, with the isolators and the main parts of the installation clearly labelled. The labels matter later: anyone working on the property’s electrics, or attending an emergency, needs to be able to see that there is solar on the premises and how to switch it off.
Planning something like this?
Send a photo of your consumer unit and electricity meter with your enquiry, and tell us if you plan to use a particular export tariff. You can read more on the electrical connections & integration page.