How much power do you need?

Is it really a need… or what?
The reality is more likely about convenience and/or comfort.

Living a Simple and Sustainable Lifestyle.

Many people, living modern lifestyles, will use as much as 30KW/h per day, in a few cases even higher than that.  Though how much power do you really need to keep all your modern conveniences?

Truth be told you need a lot less than you think, if you are willing to downsize your living space.  Lets go through everything.

Total Usage (nnKW/h per day):

We will have to include conversion losses.   while some things are 12 volt, and thus minimal conversion losses I still calculate high by calculating inverter loss in with everything.   It is always best to figure high so you will have enough power.   The conversion and transmission losses on solar include (in most cases):

  • Inverter Conversion, about 15%.
  • 18 hours per day from battery, so storage losses 10%.
  • Transmission loss 10%.

So we figure high and say 40% overall loss, thus requiring 1.8 times more production that…

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4 responses to “How much power do you need?”

  1. butimbeautiful Avatar

    When you live off grid as we do this is a very practical question.


    1. Kenneth T. Avatar

      Yes, it really is a practice question. It is better to have a surplus of power than a deficit.
      Once I lived in a dwelling not much bigger than a 6 person tent, and you’d be surprised how little power a person actually needs on a day to day basis (I used a 45 watt system then). Now, I am married w/children and my needs/wants are much greater.
      But, the power demand… is it a WANT or is it an actual NEED?

      Still, at the end of the day, the reality is having MORE is always preferable.


  2. badfinger20 Avatar

    Great blog you have. Lots of useful info and important…mine is useless trivia lol

    Liked by 1 person

    1. Kenneth T. Avatar

      Useless? Nah.
      Reliving the 70’s and 80’s with each memory.

      Liked by 1 person

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