Is a Portable Seawater Desalination Machine Suitable for Fishing Boats?

Yes — fishing boats are one of the most common applications for portable seawater desalination machines. Fishing vessels stay at sea for days or weeks at a time, and their fresh water tank capacity is limited by route and port calls. A portable seawater desalination machine draws seawater directly from over the side and produces 1–2 tons of fresh water per day, which is enough for the drinking and living water of around 10 crew members on a medium fishing boat — freeing the boat from shore water refills, extending working time at sea, and keeping the catch fresher for longer.

Power Matching: DC24V and DC12V Versions

Fishing boat electrical systems are usually DC24V, while some smaller boats run DC12V. The portable seawater desalination machine is available in both voltage versions, so it can draw power directly from the ship battery without an extra inverter. A dedicated water-making battery is recommended so the unit never drains the starter battery.

Installation Space and Layout

The unit is compact — about 0.5–1 m³ — and can be installed in the engine room, a storage locker, or under the deck. Reserve space for membrane housing replacement and an overboard brine discharge outlet. The seawater intake should be placed away from bilge discharge outlets and muddy water zones, in a clean water layer, and the intake strainer must be kept clear to prevent oil contamination from damaging the membrane elements.

Operating Cost on Board

Electricity consumption is only 3–8 kWh per ton of fresh water, putting the cost at about 5–15 yuan per ton — far below the 50–200 yuan per ton commonly charged for coastal port water supply. The machine is not limited by port schedules, so the crew can make water whenever it is needed, day or night.

Recommended Configurations by Boat Size

For a medium fishing boat (10–20 people), choose the 1–2 ton/day model with DC24V power for full daily living water. For a small fishing boat (3–8 people), a 0.5–1 ton/day model with DC12V or DC24V matching the boat's electrical system is lighter and costs less. Large ocean-going vessels may need multiple units in parallel, or an upgrade to a 4040 membrane system producing 5–10 tons per day.

For maintenance, carry spare PP filter cartridges and seals onboard. During port calls, the manufacturer — WTEYA, with nearly 20 years of desalination experience — can provide on-site service or remote cleaning guidance.

Related FAQs

How Much Water Does a Portable Seawater Desalination Machine Produce Per Day?

Is the Water Quality of Portable Seawater Desalination Good?

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