DC gate motor, elec fence and garage door solution?

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  • Andrew_van_Zyl
    Bronze Member

    • Mar 2022
    • 131

    #1

    DC gate motor, elec fence and garage door solution?

    Gents,
    A recent 30 hour power outage found me unable to get into my garage, open my driveway gate or be protected by my Nemtek electric fence.

    I picked up a 90W solar panel, mppt and 33Ah sealed lead acid battery from Centurion Systems with the view to put all the 12V stuff on one battery and charge it via the solar panel.

    Voltage drop on 1.5mm2 over the small distance is minor given that everything is pretty close by. Gate cycles are 2 per day as is the garage door - really small consumption. Depth of Discharge should not exceed 20%.

    My question. Should I:

    a) Disconnect AC power supplies to the gate, fence and door opener and run them all from the new battery? Put in a AC battery charger in case the PV panel fails.
    or
    b) Keep the power supplies connected and connect the various batteries in parallel to the new 33Ah battery?

    The power supplies will probably have different charge rates.

    The question is should the new battery become the sole power source or should the power supplies in the gate/fence/door be the primary power source, and the new battery the secondary?
  • GCE
    Platinum Member

    • Jun 2017
    • 1473

    #2
    Personally , i would buy and install 220v equipment which you could at least use for other items and expand as you go

    I put the alarm , gate , garage on the output of the inverter to at least keep them charged up and prevent having to change batteries every 6 months

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    • Andrew_van_Zyl
      Bronze Member

      • Mar 2022
      • 131

      #3
      Yip, phase 2...when I can sell a kidney

      Comment

      • Thys LOW Elektries
        Silver Member

        • Jan 2021
        • 269

        #4
        I would go with keeping, ac, for when it works, you can then charge batteries with ac or solar and split you circuits in the db and run your essentials from the inverter if possible... More costly since you would need to rewire the db, new mains and earth leakage. If possible install a second db an run all essentials from that db maybe slightly more expensive but then option one I know you know a sparky that will do the job for a good price and issue the coc for free afterwards
        Greetings and stay safe this festive season

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