Head to head · updated 5 September 2026

Rainman Portable 24VDC 55L vs Spectra Newport 400C

Newport 400C costs 2.5× less energy per litre (4.5 against 11.3 Wh/L). Newport 400C makes 1.2× the water per hour (64 against 53 L/hr). Portable 24VDC 55L is about $9,602 cheaper on indicative pricing.

SpecPortable 24VDC 55LNewport 400C
BrandRainmanSpectra
Output45–61 L/hr64 L/hr
Power draw600 W288 W
Energy per litre11.3 Wh/L4.5 Wh/L
Run time for 100 L1.9 h1.6 h
Energy for 100 L1,132 Wh450 Wh
Power source24V DC12/24/48V DC
ConfigurationPortableModular
Membranes1 × 40in1 × 2.5×40in
Indicative price$4,898$14,500
Efficiency rank19 of 305 of 30

Highlighted cells mark the better figure on that row alone. Lower is better for energy, run time and price; higher is better for output.

Buy the Portable 24VDC 55L if…

The purchase price matters more to you than the running cost; you want to lift the whole thing off the boat between trips.

Get a quote on the Portable 24VDC 55L

Buy the Newport 400C if…

Your boat runs on solar and every watt-hour is spoken for, because this is the cheaper litre to make; you want tanks full in the shortest possible run, or you have a genset that is going to run anyway; you have no generator and no intention of fitting one.

Get a quote on the Newport 400C

Common questions

Which is more efficient, the Portable 24VDC 55L or the Newport 400C?
The Newport 400C, at 4.5 watt-hours per litre against 11.3. Over 100 litres a day that is a difference of about 682 Wh.
Which makes more water, the Portable 24VDC 55L or the Newport 400C?
The Newport 400C, at 64 L/hr against 53. That is 1.2 times the output per hour running.
Which is cheaper?
On indicative pricing the Portable 24VDC 55L at $4,898, about $9,602 less than the other. Both figures exclude freight, duty and installation, and Australian dealer pricing normally reads higher.
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