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Rolls-Royce launches battery solution for tugs and OSVs

Mon 20 Aug 2018 by Martyn Wingrove

Rolls-Royce launches battery solution for tugs and OSVs
Rolls-Royce is supplying a hybrid system to a tug being built in the US

Rolls-Royce is launching a lithium-ion based energy storage system for use in a variety of marine applications including tugs and offshore support vessels.

Rolls-Royce began offering battery systems for vessels in 2010, but they were all developed by third parties. This month, Rolls-Royce unveiled its own product, SAVe Energy, which was developed in partnership with Color Line, Norled and the Norwegian Coastal Administration Shipping Company.

SAVe Energy is a modular, liquid-cooled battery system that can be scaled according to a vesselís energy and power requirements. It complies with international legislation for low- and zero-emission propulsion systems.

Rolls-Royce said SAVe Energy can be applied to supply and supplement power during several engine operating sequences, including peak shaving and spinning reserve, and can be coupled with most types of propulsion units.

In a hybrid set up, SAVe Energy handles the peak load, while the main power generators relate to the average load, allowing the propulsion units to maintain thrusting capabilities.   

Rolls-Royce executive vice president Andreas Seth said battery systems have become a key component of  power and propulsions systems and that the company will add its new battery system to several ongoing projects. These include the ongoing retrofits of offshore support vessels, upgrade programme for Hurtigrutenís cruise ferries and the advanced fishing vessel recently ordered by Prestfjord.  

A spokeswoman for Rolls-Royce told Tug Technology & Business that SAVe Energy could be used on tugs as part of a hybrid propulsion system that could include gas-fuelled or diesel engines.

She said Rolls-Royce was "in dialogue with potential customers in both the tug and the platform supply vessel market." This is for SAVe Energy that is delivered in a containerised solution that can be mounted on the deck of an existing ship.

Rolls-Royce is supplying hybrid systems for a tug ordered by Baydelta Maritime in the US in 2017.

SAVe Energy is an ESU system (Energy Storage Unit), and was recently class approved by DNV GL. It will be delivered from the Rolls-Royce Power Electric site in Bergen, Norway. Rolls-Royce said that development work on the battery system was partly funded by the Norwegian Research Councilís Energix programme.


Additional reporting by Rebecca Moore and Jamey Bergman.

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