Hybrid battery solutions for PSVs

'Island Crusader'Kongsberg Maritime will convert Island Offshore’s ‘Island Crusader’ to hybrid operation. Photo: Gunder Tande Sandersen

Kongsberg Maritime has been contracted by Island Offshore to supply turnkey hybrid battery solutions for three of the firm’s UT 776 CD-design Platform Supply Vessels (PSVs) to improve efficiency as well as reduce maintenance and emissions.

Two of the ships, Island Crusader and Island Contender, previously operated with a combination of Bergen LNG engines and Bergen Diesel engines, while the Island Commander deploys four diesels.

Combining conventional LNG or diesel engines with Kongsberg’s DNV GL-validated SAVe Energy battery system produces instant benefits, said the company. The batteries allow for fewer engines to be running, thus improving efficiency by increasing the load on the remaining engines while also instantly delivering power on demand: ideal in the context of low-load operations such as Dynamic Positioning. Fuel consumption and running costs will also be reduced through conversion of the vessels to closed bus-tie operation.

“The operational, financial and ecological benefits of hybridisation based on our lithium-ion SAVe Energy modular energy storage system speak for themselves,” said Gaute Aasen Augestad, Regional Sales Manager (EMEA), Kongsberg Maritime. “Applying this concept to the PSV market sets an important precedent for the industry, and we’re pleased to have been entrusted with delivering this integrated technology package for these Island Offshore vessels.”

The solution opted for by Island Offshore will operate via a single feed from the ESS (Energy Storage System) to the main switchboard – with manual changeover that will enable the operators to balance out running hours on generators – and a 600kW dual shore connection. Kongsberg Maritime’s 8m/26ft ESS 896kWh deckhouse will encompass a standard, type-approved, liquid-cooled container solution with air-cooled SAVe Energy batteries.

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