Systems, assemblies, and methods for operating a marine motor are provided herein. An example motor system includes a motor, a battery, and a processor. The processor is configured to receive a user input indicating a desired speed, determine a charge level of the battery, determine an optimized speed or propulsion of the marine motor based on the desired speed and the determined charge level of the battery, and transmit a signal to the motor to operate accordingly. The processor may generate a correction factor based on at least one of the determined charge level of the battery, a boat speed profile curve, and a boat travel distance curve; and determine the optimized speed or propulsion by applying the correction factor to the desired speed. Thus, an eco-mode can be provided to help maintain a high level of battery charge while still enabling desired use.

A method for managing an energy system having one or more renewable energy sources, one or more energy storage devices, one or more loads, and a grid connection for connecting at least temporarily to an external energy distribution grid is disclosed. The method generates a prediction of energy demand of the loads using historical energy demand data, and a prediction of renewable energy availability from the renewable energy sources using weather forecast data. An amount of energy to be obtained from the distribution grid is determined in dependence on the prediction of renewable energy availability and the prediction of energy demand. An energy conservation strategy is generated using the predictions and determined energy amount, and energy supplied to one or more of the energy storage devices and/or one or more of the loads is adjusted automatically according to the energy conservation strategy.

An arrangement for power distribution on a vessel, having: a first DC bus operating at a first medium voltage; at least one second DC bus operating at a second medium voltage and having no direct connection with the first DC bus; a first AC bus operating at a low voltage; a first inverter coupled between the first DC bus and the first AC bus for allowing power flow from the first DC bus to the first AC bus in a first operation mode; a second AC bus operating at the low voltage; a second inverter coupled between the second DC bus and the second AC bus for allowing power flow from the second DC bus to the second AC bus in the first operation mode; a low voltage connection system for selectively connecting or disconnecting the first AC bus and the second AC bus.

A system for power distribution including a first connection and a second connection each connected respectively to be a first multi connector cable and a second multi connector cable; said second multi connector cable being split into a set of two distinct wires with each distinct wire including a circuit protector, wherein each of the first multi connector cable and the second multi connector cable are ultimately connected respectively to a third connection and a fourth connection, and a fifth connection and a sixth connection.

A mobile offshore drilling unit includes a plurality of electric thrusters to dynamically position the drilling unit, and a microgrid electric power generation system for providing power to the plurality of electric thrusters, the microgrid electric power generation system including at least one combustion generator electrically coupled to a main electric power bus and at least one thruster electric power system, the thruster electric power system including a thruster electric power bus, an additional electric power bus connected to the thruster electric power bus via an interface device, and a circuit breaker electrically coupling the additional electric power bus to a main electric power bus for isolating the thruster electric power bus from the main electric power bus in case of loss of power on the main electric power bus.

A method of controlling power transfer in a power system including a main bus, having a first and second bus sections, the first bus section connectable to the second bus section, first and second power generating units connectable to the first and second bus sections, a first and second drive systems connectable to the first and second bus sections, a central energy storage system, and a control system. The first and second drive systems include first and second bi-directional power converters connectable to the central energy storage system, and wherein the control system is arranged to control the first bi-directional power converter to transfer power from the first drive system to the central energy storage system, and to control the second bi-directional power converter to transfer power from the central energy storage system to the second drive system.

A power generation grid for a vessel, rig or platform includes a primary energy source located above the waterline and a plurality of DC sub-assemblies, located below the waterline. Each DC sub-assembly has a DC bus, a DC/DC converter adapted to couple the DC bus to a DC energy source; an AC/DC converter adapted to couple the DC bus to an AC energy source; a DC/AC converter adapted to couple the DC bus to a corresponding load, and a first switch adapted to couple the DC bus to a DC bus of another DC sub-assembly.

A variable speed genset system is provided. The variable speed genset system may include a plurality of gensets, a switch assembly coupling one or more of the gensets to a common bus, a power electronics circuit selectively coupling the switch assembly to the common bus, and a controller in electrical communication with the gensets, the switch assembly and the power electronics circuit. The controller may be configured to designate any one or more of the gensets to operate as variable speed gensets and one or more of the remaining gensets to operate as constant speed gensets, engage the switch assembly to couple the variable speed genset to the power electronics circuit, and engage the switch assembly to couple the constant speed gensets to the common bus.

There are provided a method and a device for feeding electric power to a vehicle, etc. installed with a solar photovoltaic power generation panel employing a multi-junction solar cell in a non-contact manner by irradiating light to the solar photovoltaic power generation panel. In the method, light containing a wavelength component absorbed by each of all solar cell layers laminated in a multi-junction solar cell of the vehicle, etc. is projected from a light-projecting device to the light receiving surface of the multi-junction solar cell; and electric power generated by the irradiation of light from the multi-junction solar cell is taken out. The device includes structures for emitting light containing a wavelength component absorbed by each solar cell layer laminated in the multi-junction solar cell, and for irradiating the light to a light receiving surface of the multi-junction solar cell.

Provided are a marine testbed and a marine test method for providing marine verification and securing a track record of an eco-friendly propulsion system for a ship, wherein the marine testbed and the marine test method test and evaluate applicability of a hybrid propulsion system to the ship and facilitate securing of a track record, the hybrid propulsion system utilizing a battery, a fuel cell, a zero-carbon fuel engine, a zero-carbon fuel mixed-combustion engine, and a heterogeneous eco-friendly alternative fuel for the ship which are essential for developing an eco-friendly ship.