1. Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
    Dismiss Notice

Making off-grid electrical systems work at their best

Discussion in 'Renewable Energy' started by synaptic, Jan 5, 2016.

  1. synaptic

    synaptic New Member

    Joined:
    Jan 5, 2016
    Messages:
    21
    Likes:
    2
    Location:
    Spain
    I'm new on this forum and very interested in all things solar , so I thought I'd start off with a link to "hxxps: // handybobsolar . wordpress . com / Handy Bob ".

    I've been reading his articles for years and he really knows his stuff , especially with regard to RVs

    He also has a pretty low opinion of solar power companies , which is often amusing to read.

    I hope other people get some useful info from his blog .

    Regards

    Synaptic

    Edit : I should state clearly that I have absolutely no connection to " Handy Bob " [ electrical or otherwise :) ]
    But when I first started working with solar power systems around the Mediterranean I learned a great deal from this guy's writing !
     
    Last edited by a moderator: Jan 14, 2016
  2. Tony Stewart

    Tony Stewart Well-Known Member Most Helpful Member

    Joined:
    Aug 31, 2012
    Messages:
    3,151
    Likes:
    281
    Location:
    Richmond Hill , ON Canada near Toronto
    off-grid topics are quite varied and well-documented. Quality and capacity of energy storage device is also key and diverse.
    Panel power drops abruptly with cloud blocked sun but clear sky conditions and to a lesser extent, orientation as they tend to be wide-angle receptors (Lambertian response)
    Whereas light overcast can still disperse a good amount of energy but with noticeable loss.

    The best answer come from the best questions.
     
    • Like Like x 1
  3. zahwi

    zahwi Member

    Joined:
    Oct 24, 2015
    Messages:
    186
    Likes:
    16
    Another consideration is that those cells covered with pigeon s**t turn into a resistor that waste energy.
     
  4. dave

    Dave New Member

    Joined:
    Jan 12, 1997
    Messages:
    -
    Likes:
    0


     
  5. synaptic

    synaptic New Member

    Joined:
    Jan 5, 2016
    Messages:
    21
    Likes:
    2
    Location:
    Spain

    You have touched on some interesting points there Tony.

    I reckon that around 80% of people who have invested in solar systems are disappointed with the performance that they experience .

    Most times they contact the so-called " experts " ( often the very same people who sold them the under-performing system ! )
    And these companies always say the same thing ..... buy more batteries , or buy more panels ( or both ) ... but please buy them from us !

    And they are nearly always WRONG !

    In my experience , it is extremely rare that these are really the root causes of a poorly performing solar power system .
     
  6. Tony Stewart

    Tony Stewart Well-Known Member Most Helpful Member

    Joined:
    Aug 31, 2012
    Messages:
    3,151
    Likes:
    281
    Location:
    Richmond Hill , ON Canada near Toronto
    MPPT offer modest gains if the Vbatt is mismatched with 75% of Voc of the PV.
    Naturally there are many wrong ways to install systems.
     

Share This Page