Solar panels

Discussion in 'General Science & Technology' started by Garinc, Jan 10, 2019.

  1. Garinc Registered Member

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    2
    Having issue with solar panels charging batteries.
     
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  3. Michael 345 New year. PRESENT is 69 years old Valued Senior Member

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    Are you asking or telling?

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  5. Garinc Registered Member

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    Asking for help
     
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  7. DaveC426913 Valued Senior Member

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    Five points for brevity.

    Minus ten points for actually helping us help you.
     
  8. Michael 345 New year. PRESENT is 69 years old Valued Senior Member

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    Need to flesh it out a little more

    Explain the situation

    Details of symptoms

    Perhaps put forward your diagnosis

    Any remedial action taken

    Think of your system as a animal and posters here as vets (not mind readers)

    Go

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    I was going to suggest have you tried turning the sun off to reset it but I'm guessing you have already done that

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    Jeeves, exchemist and DaveC426913 like this.
  9. billvon Valued Senior Member

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    15,446
    OK.

    1) Determine loads on battery - maximum amps and daily amp-hours
    2) Choose battery that allows at least 3 days of autonomy (i.e. if you need 10 amp-hours a day plan for 30 amp hours) and meets max current requirements
    3) If it's lead acid multiply by 2 (i.e. if you need 30 amp hours buy a 60 amp hour battery)
    4) Now you know how many watt-hours your battery bank has. Divide by 8 to get the solar array you need. (i.e. 60 ah at 12v is 720 watts, so get ~ 100 watts)
    5) Get an MPPT controller to control battery charging.
    6) Wire it together with appropriate gauge wire, fusing, protection and switching.

    And you're done!
     
  10. Jeeves Valued Senior Member

    Messages:
    2,867
    7. If it's the old fashioned type of battery, check fluid levels, top up cells with distilled water.
    8. Your controller may be programmable to switch over from solar to grid power for a certain time (7 pm to 7 am here, when hydro rates go down and sun goes down, hydro rates go up and sun comes up)
    Plus, it helps to have panels on a frame that can change angle for maximum exposure, and protection from high wind.
    https://greenpassivesolar.com/passive-solar/scientific-principles/movement-of-the-sun/
     
  11. Kippiis Registered Member

    Messages:
    1
    Man, provide some details of your issue.
     
  12. DaveC426913 Valued Senior Member

    Messages:
    11,499
    Drive by.

    He shotgun posted across multiple boards. Someone else gave him his answer. We'll never see him again.
     
  13. RainbowSingularity Valued Senior Member

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    ...
    what are solar planners ?
     
  14. Jeeves Valued Senior Member

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    Aaawwww....Sad.
    Doesn't mean we can't talk about solar panels anymore.
     

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