12volts

Discussion in 'General Electronics Chat' started by gopher45, Sep 1, 2013.

  1. gopher45

    Thread Starter New Member

    Sep 1, 2013
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    hi could some help me please i have fitted a wind turbine to run a 12volt electrical system but cannot find the circuit to connect the battery to a 300watt immersion all i have been told that it requires a stable voltage from the battery
     
  2. GopherT

    AAC Fanatic!

    Nov 23, 2012
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    I think you mean "inverter", not "immersion".

    Inverters are widely available and cheap. The biggest selection is likely available at automotive parts stores and truck stops. Especially for 12v DC to 120vac inverters.
     
  3. gopher45

    Thread Starter New Member

    Sep 1, 2013
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    sorry i do mean immersion i bought 12v immersion on ebay that works dict but needs a clean supply

    thanks
     
  4. gopher45

    Thread Starter New Member

    Sep 1, 2013
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    i also need to stay on dc not invert to ac
     
  5. GopherT

    AAC Fanatic!

    Nov 23, 2012
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    Then, immersion what? Immersion pump, immersion heater, immersion camera,...
     
  6. MaxHeadRoom

    Expert

    Jul 18, 2013
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    What kind of control do you need, switch on at a certain point or keep permanently connected?
    I didn't mean to come between a couple of Gophers!!
    Max.
     
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  7. wayneh

    Expert

    Sep 9, 2010
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    Who told you that? Battery voltage tends to be very stable within the relatively narrow charged-discharged range.
     
  8. ian field

    Distinguished Member

    Oct 27, 2012
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    Last time I checked - an immersion heater was a spiral of resistance wire packed into a copper tube.

    Why would a 12V one be any different?
     
  9. gopher45

    Thread Starter New Member

    Sep 1, 2013
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    sorry better be more spacific it is a 12v 300watt imersion heater element what i would like to do is connect this to a battery to heat up my thermal store the battery is conected to a pv and combined with a wind turbine they charge the battery up when either the wind or the sun operates them ,ihave connected these to a charge controller so when the battery is fully charged the controller beaks the contact .what i cannofigure out is the circuit from the battery to the imersion element i think i may have to fit a voltage regulator between the battery and the immersion element
     
  10. MaxHeadRoom

    Expert

    Jul 18, 2013
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    What do you expect the maximum voltage to be when fully charging?
    Max.
     
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  11. tracecom

    AAC Fanatic!

    Apr 16, 2010
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    If the immersion element is designed for 12V, I don't see the need for a voltage regulator. Are you asking about how to switch the solar/wind output from the battery to the heater?
     
  12. ian field

    Distinguished Member

    Oct 27, 2012
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    For maximum battery life; there should be a UVLO circuit to drop the load at certainly no lower than 10.8V - I've seen stickers on car batteries; "charging not to exceed 14.4V".
     
  13. MaxHeadRoom

    Expert

    Jul 18, 2013
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    That is to avoid sulfation of the plates.
    That was the reason I asked what the maximum is I would expect a immersion heater to take this without any regulator needed?
    Max.
     
  14. gopher45

    Thread Starter New Member

    Sep 1, 2013
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    hi i think 13.5 volts the battery is 113 amps
     
  15. gopher45

    Thread Starter New Member

    Sep 1, 2013
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    i am asking how to switch so can take the supply from the battery iam thinkinking that if the solar /wind is charging and i connect the battery to the immersion then will this not cause the battery or the wiring to overheat
     
  16. shortbus

    AAC Fanatic!

    Sep 30, 2009
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    @gopher45,Some large wind turbines use immersion type heaters to bleed off current after the batteries are fully charged. Is this what you are talking about? If so it is part of a "charge control circuit". Maybe Google can give some ideas, there's a lot of information out there, if you use the right terms when searching.
     
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  17. ian field

    Distinguished Member

    Oct 27, 2012
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    IIRC; "off grid" is a useful keyword.
     
  18. snowdrifter

    Member

    Aug 13, 2013
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    If your wiring overheats, it's not large enough to handle the current demand. That shouldn't happen under any circumstance

    You shouldn't need a voltage regulator for the heater, think of it like a large resistor. It's not terribly sensitive to voltage changes. All you'll see is a bit more heat at higher voltages, and a bit less heat at lower voltages.

    However, I would invest in some sort of charge controller for the battery.
     
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  19. MaxHeadRoom

    Expert

    Jul 18, 2013
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    What is the nature of your generator?
    DC PM or wound field etc?
    300w is peanuts for a load over and above the charging current.
    Max.
     
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  20. gopher45

    Thread Starter New Member

    Sep 1, 2013
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    the manual that came with the pv said 13.5 volts
     
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