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The four happy founders of Grenland Energy have recently landed their first fully commercial agreement: the supply of a battery system for on-board cranes.

Grenland Energy has, together with their owner Kongsberg Maritime developed a system which recovers the energy generated from the cranes when lowering its load and storing it for the next time when lifting the load, in the same way as electric cars recharge their batteries when braking. The energy recovered is stored in batteries and the benefit is reduced fuel consumption and emission, as well as lower maintenance cost.

Grieg Star will now install the battery system in one of their 10 L-class vessels, with a supporting grant from ENOVA of 1.15 million NOK. If the project turns out to be a success, 10 more ships are queuing up for their turn.

Two world records
Just before Christmas, technology company Grenland Energy got Kongsberg Maritime on board as co-owner, and now this cooperation has yielded results. The agreement with Grieg Star will set two new world records – this will be the world’s first large scale high power battery pack onboard a maritime vessel and it will also be the first time batteries are used as energy storage in connection with crane operation on board of a vessel.

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Picture: Grieg Star

Reduced fuel consumption and emissions
In addition to reduced CO2 emissions, this technology will contribute to improved local air quality in harbor areas by reducing SOx, NOx and particles emissions. Such a battery system will eliminate a CO2 emission corresponding to more than 100 cars, NOx emissions of 5000 diesel cars and particle emissions of 7000 diesel cars annually within the installation’s lifetime. As a bonus, the crane operation will become more efficient resulting in reduced mooring time.

Everything in Porsgrunn
The work is getting serious now for Grenland Energy which has developed and will be producing it’s batteries in Herøya Industrial site in Porsgrunn, Norway. Already end of this year, the batteries will be delivered to Grieg Star for testing on the first vessel. The battery consists of three cabinets adding up to a total weight of approx. 1.5 tons. It has a total capacity of 67 kWh and can be charged with up to 430 kW while recovering energy from lowering a load.

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