12V & 24V DC Marine Watermakers | Open Ocean Watermakers

Power

Made for boats with large solar arrays.

An ideal fit for boats that run on DC power only.

Renewables

Solar and wind ready

Suits boats with 1000 watts or more of solar, turning peak daytime sun straight into fresh water.

Engine

Alternator and generator

Make water while motoring, while running the engine to charge batteries, or from a generator-powered battery charger.

Install

Pre-assembled

Pump and motor come pre-wired and mounted on an aluminium base plate. You connect the main power and run two wires to the control panel switch.

70 L/h

Output

56 A

Draw at 12V, about 700W

28 A

Draw at 24V

12 / 24V

Both configurations available

What's Included

The standard kit, and what you can add.

12V DC High-Output pump and brushless motor on its aluminium base plate

Standard kit

Control panel, for cabin or service-area mounting
Stainless steel high-pressure pump and boost pump
Brushless motor with weatherproof controller, adapted from electric vehicle technology
Pre-filtration assembly, with an extra 5-micron seawater filter
Carbon fibre, 2000 psi membrane pressure vessel with high-flow membranes
High-pressure hose with chafe-resistant sheathing
Manual flush system and pressure relief valve
Pickling solution for long-term storage
Complete installation and instruction manual

Options

Automatic flush

Flushes the system for 2 minutes every 7 days while the boat is unattended.

Extra 20-micron pre-filter

For silty or murky coastal water.

Surface mount brackets

Stand-off brackets for mounting the control panel and sample/tank valve panel without rear access.

Offshore spares kit

Spare filters, key O-rings and an emergency high-pressure hose repair fitting.

Every system has a 12-month warranty, plus 5 years on the carbon fibre pressure housings and end caps. See all options and upgrades →

Specifications

The numbers.

From our September 2026 data sheet.

Output	70 L/h
Rated at	Seawater at 25 °C and 35,000 ppm salinity, at 800-850 psi
Motor	1 hp brushless DC motor with a weatherproof controller, in 12V or 24V
Current draw	About 56 A at 12.5V (about 700 W). About 28 A at 24V.
Wiring	Wired directly to the 12V DC breaker panel on an 80 A supply
Solar	Suits boats with 1000 W or more of solar.
Example day	Two hours of running makes about 140 litres and uses about 112 Ah at 12V.
Water quality	About 120 ppm total dissolved solids with a new membrane, rising to about 300-400 ppm as the membrane reaches 3-4 years old.
Membrane vessel	Carbon fibre, rated to 2000 psi. Each vessel is 90 mm x 1190 mm and holds one 2.5" x 40" membrane.
Pump and motor	340 x 540 x 220 mm (W x L x H), pre-mounted on an aluminium base plate
Other components	Control panel 275 x 185 mm (H x W); sample/tank valve panel 130 x 75 mm; 12V boost pump 100 x 100 x 70 mm; seawater filter 400 x 320 x 130 mm; charcoal flush filter 400 x 370 x 130 mm (H x W x D)
Suits boats	Boats that run on DC power only
Warranty	12 months, plus 5 years on the carbon fibre pressure housings and end caps
Price	From NZ$14,960 + GST

Downloads

Specifications and manuals.

PDFData sheetQuencher 12V DC High-Output PDFQuick start guideQuencher 12V DC PDFInstallation and user manualQuencher 12V DC High-Output

Gallery

12V installs.

The first photo shows the current High-Output pump and brushless motor. The others are earlier 12V systems, included to show typical layouts. Click any photo to see it larger.