24 V DC watermakers for solar-powered boats.
Two constraints at once: solar-powered boats typically need about 66 litres a day, and a 24 V DC system has to make them inside what that electrical setup can deliver. These are the 11 systems that satisfy both.
Why 24 V DC. The same DC logic as 12 V but with half the current for a given draw, so thinner cable and less voltage drop over a long run to the machinery space. On solar-powered boats: A 400 W panel yields roughly 1,600 Wh on a clear Queensland day, and the fridge is taking a large share before the watermaker sees anything.
24 V DC systems for solar-powered boats
Ordered by what solar-powered boats optimise for. Run time and energy below are for 66 litres a day.
| System | Power | Output L/hr | Draw W | Wh per litre | Price |
|---|---|---|---|---|---|
| Zen 30 Schenker | 12/24V DC | 30 | 110 | 3.7 | $6,300 |
| Zen 100 Schenker | 12/24/48V DC or AC | 100 | 400 | 4.0 | $9,600 |
| Ventura 150 Deluxe Spectra | 12/24V DC | 24 | 108 | 4.5 | $6,000 |
| Ventura 150 Connect Spectra | 12/24V DC | 24 | 108 | 4.5 | $7,400 |
| Newport 400C Spectra | 12/24/48V DC | 64 | 288 | 4.5 | $14,500 |
| Zen 50 Schenker | 12/24V DC | 50 | 240 | 4.8 | $7,800 |
| D100 DUO Dessalatorreported | 12/24V DC | 100 | 700 | 7.0 | on request |
| D60 Freedom Dessalatorreported | 12/24V DC | 60 | 550 | 9.2 | on request |
| D60 DUO Dessalatorreported | 12/24V DC | 60 | 550 | 9.2 | on request |
| Portable 24VDC 55L Rainman | 24V DC | 45–61 | 600 | 11.3 | $4,898 |
| Modular 24VDC 55L Rainman | 24V DC | 45–61 | 600 | 11.3 | $5,053 |
5 further systems suit solar-powered boats but do not run on 24 V DC — see the full shortlist.
Common questions
- What is the best 24 V DC watermaker for solar-powered boats?
- Schenker Zen 30 leads this shortlist at 3.7 watt-hours per litre: 2.2 hours and 242 Wh to make 66 litres. "Best" here means best on the numbers for this combination — the ordering is by what solar-powered boats optimise for, and it does not account for what your dealer can actually service.
- How much 24 V DC power does a watermaker need on solar-powered boats?
- For 66 litres a day, the leader here draws about 242 watt-hours, or roughly 20 amp-hours from a 12 V bank. The spread across this shortlist is wide: compare the Wh/L column rather than the wattage, because a thirstier system that runs for less time can still cost more energy overall.
- Why are only 11 systems listed?
- Because two filters are applied, not one. 16 systems in our table suit solar-powered boats on output and configuration; 11 of those run on 24 V DC. The remaining 5 are on the full solar-powered boats shortlist and are worth a look if your electrical setup is not fixed.
Change one constraint
How this shortlist is built. 66 litres a day is 3 aboard at 22 litres each — a planning figure for this kind of boat, not a measurement of yours. From the systems that suit solar-powered boats, this page keeps only those the manufacturer rates for 24 V DC. Watt-hours per litre is rated draw divided by rated output. Methodology.