EST-Floattech has developed a nickel-manganese-cobalt (NMC) energy storage system for marine applications. There are two versions of the battery modules with a storage capacity of 5.8 kWh or 10 kWh. The company also plans to offer a variant with lithium iron phosphate (LFP) battery chemistry.
“The new system is suitable for practically any ship use; from propulsion (fully electric, hydrogen-electric, diesel-electric, etc.) to top shaving, auxiliary power and more,” said the company spokesperson. pv magazine. “This battery system covers all marine (niche) markets such as ferries, aquaculture power supply, container ships, inland tankers, motor and sailboats, workboats, crew suppliers, offshore wind support vessels, naval vessels, dredgers and many more.”
The Dutch marine energy storage specialist said the Octopus range includes a battery management system that can be integrated with a range of battery configurations and chemistries. The company currently offers two versions of its NMC battery modules – High Energy and High Power versions. The nominal voltage of the first one is 52 V and the capacity is 192 Ah. The capacity of one battery module is 10 kWh and the dimensions are 709 mm x 582 mm x 248 mm and the weight is 86.5 kg.
“High Energy batteries are designed for long-lasting and large battery installations, making them ideal for medium and large ships that sail electrically and charge at night, for example,” EST-Floattech said.
High Power batteries have short charging and discharging times and can be used in fast charging vessels that make short trips. Their nominal voltage is 52 V and the capacity is 112 Ah. The capacity of one battery module is 5.8 kWh, dimensions 709 mm x 582 mm x 248 mm and weight 82 kg.
Up to nine battery modules can be stacked together. The High Energy system, with three strings connected in parallel and 12 modules per string, reaches a capacity of 360 kWh, while the High Power system has a capacity of 208.8 kWh.
In addition to the fixed configuration, the Octopus series is available as a 10- or 20-foot container solution that can be placed on different types of vessels.
The battery modules are IP65 rated and have a DNV type certificate. EST-Floattech claims they have a lifespan of over 10 years. The company is also developing technology with lithium iron phosphate (LFP) battery chemistry.
“The market is growing due to improved sustainability and regulatory targets,” said Walter van der Pennen, CCO of EST-Floattech. “The energy revolution in maritime transport has really begun, and in recent years there has been an increase in the number of electrically powered ships. As a result, you will see more and more differentiation in the applications that shipowners and shipbuilders need, not only in direct propulsion, but also in different equipment, machinery, peak performance and hotel loads.”
The system was completely developed in Badhoevedorp, the Netherlands.