The Crown Estate said the system gives developers the opportunity to anonymously share project data, including system downtime, repairs, weather conditions and crew transfers.
The UK seabed manager said the programme can increase investor confidence and help reduce costs.
Sparta was launched in January 2014 with a year-long pilot phase. The Crown Estate and the Offshore Renewable Energy Catapult (ORE Catapult) invested £850,000 (€1 million) in the database.
Project developers and operators Centrica, Dong Energy, EDF, E.on, RWE Innogy, ScottishPower Renewables, SSE, Statkraft, Statoil and Vattenfall have all signed up to Sparta.
The programme allows operators to share "robust and reliable benchmarked data".
According to the Crown Estate, data for more than half the UK's installed offshore capacity is being submitted to the system.
"This insight allows owner/operators to benchmark their own performance, enabling them to focus on specific areas for improvement and identify measures to boost availability, reliability and the performance of turbines," the Crown Estate said.