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Off-Grid Lifestyle: How my Rainman Watermaker makes life on my sailboat even more self-sufficient
15 October 2023 · 12 min · 44K views
What this video covers
The Rainman watermaker aboard the sailboat Carl produces 140 liters per hour and runs on 110 volts AC, drawing roughly 1.28 kilowatts — confirmed by live monitoring of a 12-volt lithium bank and solar input.4:33 Nika runs the portable unit about one hour per week, preferably on a sunny day to power it from solar, then flushes the two membranes with 10 liters of fresh water before stowing it.4:29 Carl carries two tanks totaling 210 liters; before the Rainman, refilling them meant ferrying jugs by kayak from shore during dry season.0:47 A week-long water audit aboard Carl totals roughly 100 liters: 21 liters drinking, 21 cooking, 7 dishes (salt water wash, fresh-water rinse), 5 boat cleaning, 15 laundry, and 28 body hygiene.9:58 Dishes are washed in salt water and rinsed with one liter of fresh water; showers use a salt-water bucket plus about one liter of fresh water to rinse off salt.7:34 That 100-liter weekly figure compares with an estimated 646 liters for an average land-based household — nearly seven times as much.11:29 The 300 amp-hour lithium bank at 12 volts handles a one-hour Rainman run without difficulty.5:21
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