4000W Marine Inverter

LCD Screen

One glance at the front LCD tells you how the system is running. It reports DC input voltage, output frequency, phase voltage, phase current, mains bypass voltage, accumulated output energy (kWh), time, internal temperature, and any active fault. Status LEDs and a five-button keypad handle navigation, and a separate Start Switch keeps power-up a deliberate action.

Front and Rear Views

From a top-down angle, the chassis shows its airflow design: a wide field of perforated holes on the front panel, and further openings on the rear panel next to the breakers and cable entries. Air drawn by the internal fan passes over the transformer and power components before leaving the enclosure, which helps a 4 kW load stay within safe temperatures through long runs. Do not cover either side, and give the unit breathing room from walls and bulkheads.

Metal Enclosure

A rigid, painted metal case wraps the electronics. Its sturdy, long-lasting construction gives excellent impact and vibration resistance, a real advantage when engines, waves, and docking bumps shake the hull. Rack ears and carry handles simplify mounting and removal. The unit is rated IP20, so place it inside a dry, well-ventilated compartment.

Features

1. Pure Sine Wave Output: Distortion below 3% on linear loads keeps sensitive electronics, chargers, and appliances running smoothly.
2. Isolation Transformer Design: A low-frequency transformer separates the AC output from the battery bank and improves resistance to interference and shock loads.
3. DSP Control: A DSP28335 chip regulates the output quickly and accurately, with conversion efficiency above 92%.
4. Surge Capacity for Motor Loads: The 6 kW, 5-second overload reserve and soft-start function help when pumps, fans, or compressors start.
5. Layered Protection: Reverse polarity, under/over-voltage, over-current, short circuit, and overheating are covered, and faults appear on the LCD.
6. Configurable Output: Select 110/120/220/230/240V, 50 or 60 Hz, and an optional RS485 interface to suit the vessel.

Use Cases

• Electric Ferries and Water Taxis: Supplies lighting, ticketing equipment, and passenger-cabin systems from a high-voltage traction or house battery bank.
• Large Yachts and Catamarans: Handles air conditioning, galley appliances, and entertainment systems together without relying on a generator.
• Floating Cabins and Houseboats: Delivers a steady AC supply for refrigeration, cooking, and everyday living when shore power is unavailable.
• Patrol and Research Vessels: Power instruments, communication gear, and onboard workstations that need stable, low-distortion AC.

Application Scenarios

Yachts and Sailboats

Solar Energy Marine Systems

Marine Navigation & Communication Systems

Deep-sea Fishing Vessels

Q1: Should I choose the 4000W or the 3000W marine inverter?

Add up the AC loads that may run at the same time and pick the model that leaves some margin. If air conditioning, a cooktop, and other appliances overlap, 4000W is the safer choice. The 3000W model suits lighter loads on a 96V battery bank.

Q2: What DC supply does the 4000W model require?

It is built for a 120V DC input, drawing about 33 A at full load, from a lithium or lead-acid bank. If your vessel uses a different bank voltage, contact us before ordering to discuss other input options.

Q3: Can it run an air conditioner or other compressor load?

Usually yes, if the load is sized sensibly. The inverter can deliver 150% of rated power for 5 seconds and includes soft-start, but compressors differ in starting current. Check the nameplate and, for hard-starting units, keep the running load well below 4000W.

Q4: Where should the inverter be installed on a boat?

Mount it in a dry, ventilated indoor compartment, away from bilge spray and direct sunlight. The enclosure is IP20 rated, so it is vibration-resistant but not splash-proof, and the front and rear ventilation openings must stay clear.

Q5: What is the RS485 option for?

RS485 is an optional communication interface for connecting the inverter to a monitoring or control system on board. If you do not need remote communication, select N/A when ordering.