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an easy and cheap DIY big powerbank for campers

Step 1: Part List

i use:

* 12v 18Ah Lead Acid Battery

* 10A solar charge controller

* 30w 18v solar panel

* 12-24 to 5v 2,5Ah dc to dc converter

Step 2: Build It

  • put the controller and the 5v converter with hot glue at the top of the battery and connect the wires
    • add a 4 pin connector to plug and unplug the solar panel easily
    • add the usb ports on 5v converter and a connector for 12v output

    Step 3: Connection Diagram

    • add a fuse on the (+) of battery
    • add a switch for the 5v converter and one for 12v if you want
    • add if you want a led dimmer

    do not connect anything direct on the battery if not needed.

    the solar controler have over-charging /over-discharging protection

    Step 4: End

    now can have energy for days with no sun

    <p>Very nice build. Thanks for the write-up.</p>
    <p>thanks a lot too!!</p>
    How much juice is needed to power a lamp or refrigerator
    for lamps. choose led lamps. very efficient and lot of light
    <p>you are right! thanks</p>
    that is approx a 4.5 ah
    minimal amount for peltier element style cooler box 40_50wats 12 volt
    <p>It depends...</p>

    About This Instructable

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