Senvion's vice-president of corporate communications and marketing, Immo von Fallois, revealed the plans at the AWEA Windpower 2017 event (23-25 May) in California.
He told reporters that Senvion is planning to reveal the, as yet, unnamed turbine in London, and stopped short on giving any further details.
"It's not ready now, but we know when we will deliver and we have all the facts and figures," he said.
"We're coming with a very big turbine," Fallois added.
Senvion is set to become the first major OEM to confirm plans for a 10MW-plus turbine. Joint venture MHI Vestas currently has the largest know offshore wind turbine, offering a 9MW version of its V164 machine to the market.
Senvion itself offers a 6.2MW turbine with a 152-metre rotor, which received its first order in September 2016 for the 203MW Trianel Borkum II project.
GE, the other player in offshore wind still offers its 6MW Haliade turbine, installed at the US' first offshore wind project, the 30MW Block Island site.