Head to head · updated 5 September 2026

Spectra Newport 400C vs Rainman Portable AC 75L

Newport 400C costs 4.1× less energy per litre (4.5 against 18.2 Wh/L). Portable AC 75L is about $10,098 cheaper on indicative pricing.

SpecNewport 400CPortable AC 75L
BrandSpectraRainman
Output64 L/hr55–82 L/hr
Power draw288 W1,250 W
Energy per litre4.5 Wh/L18.2 Wh/L
Run time for 100 L1.6 h1.5 h
Energy for 100 L450 Wh1,825 Wh
Power source12/24/48V DCAC 240V
ConfigurationModularPortable
Membranes1 × 2.5×40in1 × 40in
Indicative price$14,500$4,402
Efficiency rank5 of 3027 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 Newport 400C if…

Your boat runs on solar and every watt-hour is spoken for, because this is the cheaper litre to make; you have no generator and no intention of fitting one.

Get a quote on the Newport 400C

Buy the Portable AC 75L if…

You want tanks full in the shortest possible run, or you have a genset that is going to run anyway; 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 AC 75L

Common questions

Which is more efficient, the Newport 400C or the Portable AC 75L?
The Newport 400C, at 4.5 watt-hours per litre against 18.2. Over 100 litres a day that is a difference of about 1,375 Wh.
Which makes more water, the Newport 400C or the Portable AC 75L?
The Portable AC 75L, at 68.5 L/hr against 64. That is 1.1 times the output per hour running.
Which is cheaper?
On indicative pricing the Portable AC 75L at $4,402, about $10,098 less than the other. Both figures exclude freight, duty and installation, and Australian dealer pricing normally reads higher.
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