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Sizing calculator

What fits your boat, and what it costs to run.

Same dataset as the table, plus your crew and your power. DC systems must fit inside the daily energy you can spare; AC systems need a generator or shore power; petrol needs fuel.

Your boat
Your power
40L
water per day
280L
per trip, no tanks
2,400Wh
usable bank at 50%
21 systems fit
14 don't fit your power
Zen 30
Schenker · 12/24V DC
Fits inside your spare energy
Run time, of 24 h1.3 h
Energy, of 1,500 Wh spare147 Wh
6%
of usable bank
$6,300
indicative
Zen 100
Schenker · 12/24/48V DC or AC
Fits inside your spare energy
Run time, of 24 h0.4 h
Energy, of 1,500 Wh spare160 Wh
7%
of usable bank
$9,600
indicative
Ventura 150 Deluxe
Spectra · 12/24V DC
Fits inside your spare energy
Run time, of 24 h1.7 h
Energy, of 1,500 Wh spare180 Wh
8%
of usable bank
$6,000
indicative
Ventura 150 Connect
Spectra · 12/24V DC
Fits inside your spare energy
Run time, of 24 h1.7 h
Energy, of 1,500 Wh spare180 Wh
8%
of usable bank
$7,400
indicative
Newport 400C
Spectra · 12/24/48V DC
Fits inside your spare energy
Run time, of 24 h0.6 h
Energy, of 1,500 Wh spare180 Wh
8%
of usable bank
$14,500
indicative
Zen 50
Schenker · 12/24V DC
Fits inside your spare energy
Run time, of 24 h0.8 h
Energy, of 1,500 Wh spare192 Wh
8%
of usable bank
$7,800
indicative
D100 DUO
Dessalator · 12/24V DC
Fits inside your spare energy
Run time, of 24 h0.4 h
Energy, of 1,500 Wh spare280 Wh
12%
of usable bank
on request
indicative
D60 Freedom
Dessalator · 12/24V DC
Fits inside your spare energy
Run time, of 24 h0.7 h
Energy, of 1,500 Wh spare367 Wh
15%
of usable bank
on request
indicative
D60 DUO
Dessalator · 12/24V DC
Fits inside your spare energy
Run time, of 24 h0.7 h
Energy, of 1,500 Wh spare367 Wh
15%
of usable bank
on request
indicative
Portable 48VDC 140L
Rainman · 48V DC
Fits inside your spare energy
Run time, of 24 h0.3 h
Energy, of 1,500 Wh spare394 Wh
16%
of usable bank
$6,240
indicative
Frame 48VDC 140L, manual
Rainman · 48V DC
Fits inside your spare energy
Run time, of 24 h0.3 h
Energy, of 1,500 Wh spare394 Wh
16%
of usable bank
$8,666
indicative
Frame 48VDC 140L, auto
Rainman · 48V DC
Fits inside your spare energy
Run time, of 24 h0.3 h
Energy, of 1,500 Wh spare394 Wh
16%
of usable bank
$12,115
indicative
Scout SW20
LEDI · 12V DC
Fits inside your spare energy
Run time, of 24 h2.0 h
Energy, of 1,500 Wh spare400 Wh
17%
of usable bank
on request
indicative
Modular 48VDC 140L
Rainman · 48V DC
Fits inside your spare energy
Run time, of 24 h0.3 h
Energy, of 1,500 Wh spare417 Wh
17%
of usable bank
$6,421
indicative
Portable 24VDC 55L
Rainman · 24V DC
Fits inside your spare energy
Run time, of 24 h0.8 h
Energy, of 1,500 Wh spare453 Wh
19%
of usable bank
$4,898
indicative
Modular 24VDC 55L
Rainman · 24V DC
Fits inside your spare energy
Run time, of 24 h0.8 h
Energy, of 1,500 Wh spare453 Wh
19%
of usable bank
$5,053
indicative
Portable 12VDC 34L
Rainman · 12V DC
Fits inside your spare energy
Run time, of 24 h1.3 h
Energy, of 1,500 Wh spare508 Wh
21%
of usable bank
$4,898
indicative
Modular 12VDC 34L
Rainman · 12V DC
Fits inside your spare energy
Run time, of 24 h1.3 h
Energy, of 1,500 Wh spare508 Wh
21%
of usable bank
$5,053
indicative
Portable Petrol 75L
Rainman · Petrol
Petrol · about 0.4 L fuel a day
Run time, of 24 h0.6 h
No electrical drawfuel
—
of usable bank
$5,804
indicative
Portable Petrol 70L
Rainman · Petrol
Petrol · about 0.4 L fuel a day
Run time, of 24 h0.6 h
No electrical drawfuel
—
of usable bank
$6,699
indicative
Portable Petrol 140L
Rainman · Petrol
Petrol · about 0.2 L fuel a day
Run time, of 24 h0.3 h
No electrical drawfuel
—
of usable bank
$6,731
indicative
Run time assumes the midpoint of the manufacturer’s output range. Wh/day is your daily litres multiplied by the system’s Wh per litre, shown against the energy you said you can spare. A day’s water in under two hours is comfortable; over six is a system you will resent.
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