SELMA SEES Ship Energy Efficiency System uses VFD Variable Frequency Drives to optimize engine room fans, cooling sea water pumps, and low temperature fresh water pumps, delivering measurable fuel saving and CO₂ emission reduction. This advanced solution supports IMO CII compliance, enabling effective ship decarbonization and reliable auxiliary machinery energy optimization.

SELMA delivers an advanced SEES ship energy efficiency system with VFD Variable Frequency Drives, designed for IMO CII compliance energy saving system and proven vessel decarbonization technology for shipping. Our solution ensures measurable ship CO₂ emission reduction system, acting as a reliable fuel saving system for ship engine room. With intelligent control, SELMA enables ship energy optimization with VFD Variable Frequency Drives, seamless marine VFD retrofit fans and pumps, and optimized cooling sea water pumps VFD Variable Frequency Drives control, low temperature fresh water pumps optimization VFD Variable Frequency Drives, plus ship engine room fans energy saving solution. These functions maximize vessel auxiliary systems energy efficiency and deliver effective ship fuel consumption reduction technology.
This complete ship automation for emission reduction VFD Variable Frequency Drives enhances vessel energy management and decarbonization while serving as the most trusted ship compliance system for IMO CII and EEXI VFD Variable Frequency Drives. It integrates energy efficient control for ship auxiliary machinery VFD Variable Frequency Drives with marine variable frequency drives energy optimization, achieving substantial ship generator load reduction with VFD Variable Frequency Drives system. Supporting sustainable shipping technology fuel saving, SELMA also provides ship energy monitoring and optimization system and a robust decarbonization solution for ship pumps and fans.
The result is a powerful vessel fuel efficiency and CO₂ reduction system VFD Variable Frequency Drives, with intelligent VFD Variable Frequency Drives control for ship engine room, advanced energy saving technology for marine cooling pumps, and a complete ship auxiliary machinery decarbonization solution. With proven ROI as a vessel energy efficiency ROI 12 months payback, operators secure compliance through marine automation system for CII compliance, ship power optimization with VFD Variable Frequency Drives technology, and the industry’s most advanced ship decarbonization and emission control VFD Variable Frequency Drives.

SELMA SEES Ship Energy Efficiency System is the world’s first type approved system by American Bureau of Shipping (ABS) implementing innovative management control of auxiliary machinery.
SELMA SEES Ship Energy Efficiency System is a PLC/SCADA platform interfaced with the appropriate sensors and transducers installed on existing engine room plant machinery.

SELMA SEES Ship Energy Efficiency System is a PLC/SCADA platform interfaced with the appropriate sensors and transducers installed on existing engine room plant machinery.
SELMA SEES is using advanced control algorithms and procedures to optimise the performance of auxiliary machinery according to the dynamically calculated ideal level of operation.


SELMA specialized engineers review the existing auxiliary machinery and perform an expertise study of specific intervention with VFD (Variable Frequency Drives) on the power plant in order to implement the SEES installation during drydock or even during seagoing condition without affecting ship operation.

SEES is a promising method/application in order to reduce a vessel’s fuel consumption by optimizing its power balance and in parallel by adapting the operation of the actual power requirements.
A widely adopted practice onboard a modern vessel is the operation of its Main Engine (M/E) by slow at speeds lower than its specified MCR (Maximum Capacity Ratio). A side effect of this technique is the operation of the vessel’s Diesel Generators with increased SFOC (Specific Fuel Oil Consumption), especially during sea going operation, since Engine Room Motors operation are not compliant with the original load balance study and PMS settings.
As a result of slow steaming practice, the requirements of M/E and auxiliary machinery regarding combustion air and cooling water flow are much lower when compared to capacities required at maximum MCR.





SEES is a unique system based on advanced control techniques in order to improve E/R Power balance and reduce D/G Fuel Consumption.
SEES, as an energy saving solution, is based on the air balance and heat dissipation calculations for slow steaming M/E operation, according to each vessel’s unique operating profile. The parameter adjustment for the control algorithm depends on both performance and safety requirements.


SEES onboard measurements presented considerable energy and fuel savings, as well as impressive mitigation of emission factors (CO2/SO2/NOx), while power balance improvement allows the use of only one D/G in sea going operation, resulting in additional performance boost.
VFD Control algorithm improves system dynamics regardless of the controlled plant as per ship particulars, ensuring safety and reliability.

Power balance is improved; leading to significant economic and operational benefits as well as emission factor reduction is achieved, verifying that the vessel can be greatly benefited by the proposed energy efficiency upgrade.

SEES VFD Ship Energy Efficiency System