A grid connection must be arranged with your local Distribution Network Operator (DNO) company. Network capacity is scarce in certain parts of the country and should be assessed and reserved as early as possible, to prevent delays to a project.
The costs of grid connection are site-specific, but the main variables influencing cost are: connection voltage; physical location and access to the network; network capacity and availability; upgrade requirement, if any; and generation technology.
As a generator "embedded" in the distribution network, you will gain certain "embedded benefits", which bring financial rewards including: Distribution and Transmission transport Losses; Distribution and Transmission Use of System charges; and Balancing Services Use of System charges.
The engineering recommendations that govern the connection of new generation vary mainly depending on the size of installation. The connection process is almost standard across the whole UK although each DNO may have slightly different forms to complete.
The general procedure is: initial connection enquiry; connection application and design; construction, and testing and commissioning.
The costs vary between DNOs and also depending on the connection voltage. Design fees vary between a few hundred pounds for small low voltage connections to several thousand for connections to the 33 kV network.
The DNO then has a 3 month period to design and cost an appropriate connection. The DNO will also identify the contestable and non-contestable works.
Once the design is complete, contracts are signed. In addition, Use of System Agreements will have to be signed for the export of electricity to the network.