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Thread: Which solar panel to buy

  1. #51
    Patrol God threedogs's Avatar
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    I cant get any readings , I think my new 18 ah deepcycle battery is U/S.
    friggen sore as bending down even sitting on a milk crate..
    Might buy that LCD display controller for my new panels, I'll check battery
    down at my Battery place [Alco] Hmmm battery is new, bit of a mystery.
    Plus my multi meter is not the best going around GRrrrrrr
    Last edited by threedogs; 1st October 2015 at 10:56 AM.
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  3. #52
    Patrol God threedogs's Avatar
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    @ ET wired the pos and neg from the 80 watt BP solar Panel to the pos and neg on the solar icon on the controller
    then wired the pos and neg to the battery icon terminating in a 50 amp anderson plug.
    with my multi meter I have 19v from the Panel and 19 volts at the anderson plug.
    what have I done wrong other than buy a cheap controller lol

    http://www.ebay.com.au/itm/30A-12V-2...752&rmvSB=true

    I think I may have to connect to a battery to complete the circuit
    Last edited by threedogs; 14th October 2015 at 12:12 PM.
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  4. #53
    I am he, fear me the evil twin's Avatar
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    Quote Originally Posted by threedogs View Post
    @ ET wired the pos and neg from the 80 watt BP solar Panel to the pos and neg on the solar icon on the controller
    then wired the pos and neg to the battery icon terminating in a 50 amp anderson plug.
    with my multi meter I have 19v from the Panel and 19 volts at the anderson plug.
    what have I done wrong other than buy a cheap controller lol

    http://www.ebay.com.au/itm/30A-12V-2...752&rmvSB=true

    I think I may have to connect to a battery to complete the circuit
    Always hook up your battery to the Reg before you connect the Panel.

    19 Volts is the open circuit voltage (so far so good) and, yes, the battery 'completes' the circuit.
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  5. #54
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    .... should have added;

    The battery voltage (when connected) will tell the Reg if it is a 12 or 24 volt system and 'pull down' the voltage to more like what you are expecting.

    Typically, using a 12 volt panel and a battery approx 90% SOC or better) the Reg will then have;
    If it is a PV type say 13.3 volts at the Reg "Panel" terminals and 13.1 to 13.3 volts at the Reg "Battery" terminals
    If it is an MPPT type 17.5 volts at the Reg "Panel" terminals and 13.1 to 13.3 volts at the Reg "Battery" terminals

    That is just a guide as the "Battery" voltage reading will change depending on the mode of the Reg and SOC of teh battery from around 13.0 ish to around 13.7 ish
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  6. #55
    Patrol God threedogs's Avatar
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    Thanks again "onwards and upwards I go" lol
    The battery isnt that old Ill get the battery ppl to load it up and test
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  7. #56
    Patrol Guru sooty_10's Avatar
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    Hey threedogs where did you get your panel, im currently on the lookout.

    Sent from my SM-G925I using Tapatalk

  8. #57
    Patrol God threedogs's Avatar
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    Hi Sooty sorry for the delay , check my link a few posts back
    Paid under $200 for a folding 120 watt with carry bag. Happy with that so now at camp
    on a good day I'll be returning about 6AH back into my battery.
    My 80 watt BP panel I brought nearly 20 yrs ago 2nd hand and its still pushing out 19 volts
    Paid $150 for that one.
    The "GO" back then was to glue the reg to the panel, and over the years it fries the reg.
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    Patrol Guru sooty_10's Avatar
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    I've checked all the links and can only find regulators/connectors. None for the specific panel? Im thinking about just biting the bullet on the rich solar ones.

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  10. #59
    Patrol God threedogs's Avatar
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    http://www.ebay.com.au/itm/MACHT-12V...item258ca19ed5

    Heres my panels ,german made and 25 yrs warranty and under $200
    Hope this helps.
    If there was a down side to these is that they fold with the solar panels on the outside.
    The carry bag is not padded so be wary of that and how you pack them

    OH and my 18ah deep cycle battery was 5 yrs old and swelling badly
    so a new one is required,
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  11. #60
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    What do you guys think of this panel ? for its weight (2.2 KG) seems to be ok.. but I could be wrong. It dosent have an MPPT controller so I will need to get that as well.

    http://www.ebay.com.au/itm/GISTA-12V...torefresh=true
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