Marine Grade Waterproof Medium Voltage VFD | SUNSIN Marine Inverters

Medium & High Voltage VFD Solutions for Marine Industry

Marine Grade Medium & High Voltage VFD Solutions for Ships & Offshore

Common inverter corrosion failure on ship
  • Salt fog, high humidity and marine atmosphere cause severe corrosion to standard inverters
  • Ship sailing vibration & wave impact lead to VFD loose connection and unexpected tripping
  • Marine grid is weak and sensitive, ordinary inverters generate severe harmonic interference
  • Propulsion and large pump loads bring frequent torque impact and overload conditions
  • Limited cabin space requires compact, high-power density drive equipment
  • Traditional fixed-speed marine equipment wastes massive auxiliary power energy

Core Advantages

Exclusive marine grade technical strengths of SUNSIN offshore dedicated VFDs

Salt-Fog Anti-Corrosion Design

Marine-grade coating, fully sealed cabinet and anti-salt-fog protection, long-term operation in coastal and ocean atmospheric environment.

High Vibration & Shock Resistance

Reinforced internal structure and anti-loose wiring design, adapts to continuous ship vibration and wave impact loads.

Low Harmonic Three-Level Topology

Improve marine power quality, avoid interference with navigation, communication and precision marine instruments.

Marine Heavy-Duty Overload Capacity

Strong torque output and 200% overload capability, suitable for propulsion and large marine impact loads.

Main Application Scenarios

Full chain drive solutions for all marine and offshore equipment

SUNSIN marine VFDs cover vessel auxiliary systems, main propulsion and offshore platform equipment, providing fully seaworthy, corrosion-resistant and energy-saving variable frequency drive solutions for the entire marine industry chain.

Marine Main & Auxiliary Propulsion System

Marine Main & Auxiliary Propulsion System

Smooth torque control for electric propulsion thrusters, improving navigation stability and fuel efficiency.

Bilge & Ballast Water Pumps

Bilge & Ballast Water Pumps

PID constant pressure control, adaptive flow adjustment for ship drainage and ballast management.

Cabin Ventilation & Exhaust Fans

Cabin Ventilation & Exhaust Fans

Dynamic air volume regulation to reduce auxiliary power consumption and optimize cabin air environment.

Offshore Platform Water Injection Pumps

Offshore Platform Water Injection Pumps

Heavy-duty medium voltage drive for high-power oilfield platform process equipment.

Marine Cranes & Lifting Machinery

Marine Cranes & Lifting Machinery

Four-quadrant stable speed control to handle frequent lifting impact loads.

Heat Exchange & Cooling Water Systems

Heat Exchange & Cooling Water Systems

Energy-saving speed regulation for ship central cooling and HVAC circulation pumps.

Recommended Products

Matched marine waterproof anti-corrosion VFD models for different offshore & ship equipment

MV3000 Marine-Grade Three-Level VFD

MV3000 Marine-Grade Three-Level VFD

Suitable for ship main propulsion & offshore high-power equipment

MV2000 Shockproof Medium Voltage VFD

MV2000 Shockproof Medium Voltage VFD

Offshore platform water injection & large pump drives

LV800 Salt-Corrosion Resistant VFD

LV800 Salt-Corrosion Resistant VFD

Cabin fans, small pumps and auxiliary machinery

Four-Quadrant Regenerative Marine VFD

Four-Quadrant Regenerative Marine VFD

Marine crane and frequent feedback loads

Frequently Asked Questions

Long-tail questions about marine waterproof anti-corrosion medium voltage VFD solutions

Q1: Can marine grade VFD work stably in long-term salt fog offshore environment?
A: Yes. Our VFD adopts special marine anti-salt-fog coating and fully sealed cabinet, passing strict salt spray test, suitable for long-term ocean and coastal operation.
Q2: Will marine VFD cause harmonic interference to ship navigation instruments?
A: Three-level low harmonic topology effectively suppresses harmonic distortion, protecting communication, radar and precision marine equipment from interference.
Q3: Is the drive resistant to continuous ship vibration during sailing?
A: Reinforced internal frame and anti-loose wiring structure, designed to withstand long-term wave vibration and mechanical shock at sea.
Q4: Can medium voltage marine VFD be used for vessel main propulsion thrusters?
A: MV3000 three-level marine dedicated series is specially developed for ship main propulsion systems with strong low-speed torque and heavy overload capacity.
Q5: Do you offer four-quadrant regenerative type for marine lifting cranes?
A: We supply four-quadrant regenerative marine VFD, which can stably handle frequent lifting and feedback energy loads of marine cranes.
Q6: Are marine VFDs certified for ship and offshore platform projects?
A: Our marine series can provide complete marine inspection certification documents for shipyard and offshore tender bidding.

Custom Marine VFD Solution



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