i am referring to boats equipped with AC, sorry, i thought that was self evident.
a watermaker cost about 3000-5000. an AC and generator
can cost up to 8000..
however if you have both.... then you have condensate.
so looking up dehumidifiers...
a 30 pint per day unit consumes 1KWH or 80 amp hours to make 1.85 liters of water.
so for 160 amp hours you get 1 gallon of fresh water.
the cost of the unit is $180.
30 pints is nearly 4 gallons a day. at a total 24 hour consumption
of aprox640 amp hours.
and this is linear on the 50 pint and 70 pint units.
what does it take to make 640 amp hours?
easy. a 200 watt panel make 1KWH every 5 hours, or 84 amp hours aprox.
so could this be done on solar
perhaps if you had a 1000watt system.
but for those with larger yachts, we can run a generator.
we can also use a larger unit, making 10 gallons a day.
now, this is not a massive amount. it is also not efficient.
but over a 2-3 year trip, i would bet the math would show it would be cheaper.
how often do we really do a passage
? how long are we really from a water source?
is having water for those few weeks worth $5000?
or can you get along with 10 gallons a day, running your generator when needed?
or run an AC unit and make even more water....
with this idea, i don't see the need for a water maker on a larger yacht.