Inverter and Battery capacity for washing machine

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  • J.P.M.
    Solar Fanatic
    • Aug 2013
    • 15015

    #31
    Originally posted by Greta Gremlin
    I respect that this forum provides free consultation from professionals and don't wish to abuse it.
    If the information I am giving is bad, I will edit the posts and remove any potentially dangerous information at yours or any qualified person's request.
    If you respect the forum and the free advice, then I'd suggest before you write something you also have some appreciation for fellow posters and mods who read what you write, and consider the effects your postings may have on their actions.

    The way I learned it, one mark of the professional is that they confine their advice to the areas in which they claim proficiency, and refrain from giving advice in areas where they lack proficiency. They are also careful to separate what they think they know from opinion and conjecture.

    They also have the professionalism and courtesy to not expect others to pick up after them as you seem to be expecting others here to do.

    Everyone makes mistakes but spouting off without knowledge is a mistake that should be stopped before it's spoken/written, and not corrected by others after the fact.

    IMO only, regular posters and mods here are not nurse maids. Self regulate and constrain yourself.

    If you're not pretty sure, or don't know what you're talking (writing) about, have the courtesy to not lead others astray with potentially incorrect - and more importantly - perhaps dangerous, or costly, or time wasting information. Ask a question rather than take a chance at pronouncing fallacy, and/or at least provide some backup reasoning for what you present. Doing it that way also saves others time not spent cleaning up/correcting/calling out potentially dangerous and/or costly messes.

    Take what you want of the above. Scrap the rest.

    Comment

    • Sunking
      Solar Fanatic
      • Feb 2010
      • 23301

      #32
      Originally posted by Paul Land

      Lets K.I.S.S. Watts divided by Volts = Amps & Amps X Volts = Watts Ying&Yang
      Poor advice again and has nothing to do with AC Power. 23000 answers and counting. The mods come to me for advice. Check the Stickies. I wrote most of them.
      MSEE, PE

      Comment

      • Mike90250
        Moderator
        • May 2009
        • 16020

        #33
        Originally posted by Paul Land

        Lets K.I.S.S. Watts divided by Volts = Amps & Amps X Volts = Watts Ying&Yang
        And this applies to power factor how ? You can't throw up alphabet soup and obfuscate the problem.
        An inverter or generator HAS to be able to handle the increased load caused by poor PF. This is where the VA calculations for AC come into play, and not the simpler DC watts. This is how a "30W" CFL needs 94 watts from the inverter or generator - because the power factor throws the V and I out of phase and the inverter or generator has to supply the difference via extra capacity. The load the batteries see is the original nameplate load (30W)

        There is a great ( but long ) writeup about VA and PF vs Watts in this link

        It was written for the movie industry techs, because the new low power lighting gear, is not the simple 1kw klieg light anymore, it's a 90W LED with poor PF and you can't hook 11 of them to a generator, because it simply is not a 1kw load.
        Lots of sketches and diagrams in the article
        Powerfab top of pole PV mount (2) | Listeroid 6/1 w/st5 gen head | XW6048 inverter/chgr | Iota 48V/15A charger | Morningstar 60A MPPT | 48V, 800A NiFe Battery (in series)| 15, Evergreen 205w "12V" PV array on pole | Midnight ePanel | Grundfos 10 SO5-9 with 3 wire Franklin Electric motor (1/2hp 240V 1ph ) on a timer for 3 hr noontime run - Runs off PV ||
        || Midnight Classic 200 | 10, Evergreen 200w in a 160VOC array ||
        || VEC1093 12V Charger | Maha C401 aa/aaa Charger | SureSine | Sunsaver MPPT 15A

        solar: http://tinyurl.com/LMR-Solar
        gen: http://tinyurl.com/LMR-Lister

        Comment

        • sevensixtwo
          Junior Member
          • Jan 2019
          • 4

          #34
          I have a 10 amp, 110 volt washing machine. If I use (amps x volts) = watts, I see I will need 1.1kW. Assuming one or more 12V batteries, what is a panel/battery arrangement that will run this washing machine? I've seen it written that one should not use an inverter above 1kW with a 12V battery, but also I can wire multiple 12V batteries for 24V. I would run the washer once a week, and I would have a misc 100W load about 10 hours a day. Thanks!

          Comment

          • Ho jo
            Solar Fanatic
            • Nov 2017
            • 156

            #35
            I've came to the conclusion it's a lot cheaper to run my 2000 generator for washing clothes. My calculator says 1500 2000 surge inverter @24 volts battery bank around 450 amp hrs @24 volts. For 1 hour once a week cost less than 1 dollar in fuel. It would cost much more just replacing batteries every 2-4 years

            Comment

            • PNW_Steve
              Solar Fanatic
              • Aug 2014
              • 433

              #36
              Originally posted by J.P.M.

              If you respect the forum and the free advice, then I'd suggest before you write something you also have some appreciation for fellow posters and mods who read what you write, and consider the effects your postings may have on their actions.

              The way I learned it, one mark of the professional is that they confine their advice to the areas in which they claim proficiency, and refrain from giving advice in areas where they lack proficiency. They are also careful to separate what they think they know from opinion and conjecture.

              They also have the professionalism and courtesy to not expect others to pick up after them as you seem to be expecting others here to do.

              Everyone makes mistakes but spouting off without knowledge is a mistake that should be stopped before it's spoken/written, and not corrected by others after the fact.

              IMO only, regular posters and mods here are not nurse maids. Self regulate and constrain yourself.

              If you're not pretty sure, or don't know what you're talking (writing) about, have the courtesy to not lead others astray with potentially incorrect - and more importantly - perhaps dangerous, or costly, or time wasting information. Ask a question rather than take a chance at pronouncing fallacy, and/or at least provide some backup reasoning for what you present. Doing it that way also saves others time not spent cleaning up/correcting/calling out potentially dangerous and/or costly messes.

              Take what you want of the above. Scrap the rest.
              Well said JPM.

              Thank you.

              Comment

              • J.P.M.
                Solar Fanatic
                • Aug 2013
                • 15015

                #37
                Originally posted by PNW_Steve

                Well said JPM.

                Thank you.
                Well, one way to look at the worth of this forum is as a place for opinions, and opinions vary, but I appreciate the comment.

                Comment

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