[RE-wrenches] Off-Grid Whole House RO

[Dana Orzel]

I really have not been following this but: IMHO RO off grid is wasteful & not appropriate.


  1.  There are RO systems that use a lot less water than other RO systems. All RO systems are not equal.
  2.  There are many filtration systems that can do what RO does without wasting any water at all. You will go thru filters though.
  3.  I understand the brackish/salt? Issue I have done large house sized RO systems to a 2,500-gallon tank in CO.
  4.  The challenge with most water filtration companies is they are used to the grid - lots of power & unlimited waste.
  5.  Haul or get delivered water? Had a few folks back in the day with solid rock under there place with no water under the rock.
  6.  **. Assuming the RO system doesn't need rhe 1.25hp pump ( i  am assuming the RO goes into a tank and much then has a pressure pump to supply the house. If it doesn't I would recommend installing said design) I'd install a smaller motor and pump head to better match the RO flow rate.
You could look at getting a high efficiency DC pump or 3 phase with vfd.
Sun pumps has such things.
  7.  I like #6 so far...
  8.  Maybe Ro at a few locations for drinking & a lesser filtrated water for shower etc?



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Dana Orzel                GREAT SOLAR WORKS!
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From: Jason Szumlanski via RE-wrenches <re-wrenches at lists.re-wrenches.org>
Subject: Re: [RE-wrenches] Off-Grid Whole House RO
Date: Fri, 9 May 2025 17:53:55 +0000
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