The scheme, part of the offshore wind test and demonstration leasing programme announced by the Crown Estate in June, aims to encourage investment in a range of projects, accelerate testing of emerging technologies and reduce the cost of energy.
The Crown Estate, which manages the UK's sea bed, has called for expressions of interest in off-grid projects and variations to existing offshore wind projects.
According to the Crown Estate, nearly a third of the initiatives identified by its offshore wind cost reduction taskforce in 2012 do not require a grid connection or a turbine.
Off-grid projects will allow for the testing of processes such as new foundations, cable laying and operations and maintenance procedures, while the second option is aimed at brining together parties that do not have a project with existing leaseholders, to test new technology.
The organisation said: "By leasing specific sites for projects that don't involve a grid connection and a turbine, sites can be smaller, cheaper and easier to consent.
"This should enable the test and demonstration of novel technologies and processes such as new foundations, cable laying and operations and maintenance procedures."
The call for interest in project variations is aimed at applicants without a site that have a defined test and demonstration project, and current site holders who would welcome test projects or be interested in collaborating on joint ventures.