AIDA Cruises is working toward powering its vessels partially off of battery power.
The Costa Group subsidiary has signed a corresponding agreement with Norway's Corvus energy to install lithium-ion battery storage systems onboard one ship next year.
The Michael Thamm-led company said the end game is to place them eventually on its entire fleet of 13 ships.
"Our goal is the emissions-neutral ship operation," he said in a statement.
"The electrification of our ships is another important milestone on this path."
Germany-based AIDA said it expects to put "this innovative technology on a large cruiseship" in a few months has yet to decide which vessel that would be.
The company did not also say how much of the ship's power would come from the batteries or when it plans to have them on all of its vessels.
The initiative is part of a "Green Cruising Strategy" through which the owner in late 2018 launched 6,600-berth AidaNova (built 2018), the world's first cruiseship running entirely off of LNG.
AIDA expects to have two more vessels operating solely off of LNG by 2023.
It also plans to have 12 of out of 14 ships able to receive shore power where available by early 2020.
Its 2,174-berth AIDAsol (built 2011) has used electricity from an on-shore power plant in Hamburg-Altona since 2017, the company said.
AIDA is also exploring CO2-free production of liquefied gas from renewable resources through a "Power to Gas" project.
It plans to test a fuel cell onboard an AIDA ship by 2021 in cooperation with Meyer Werft shipyard and other partners.
