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    Best Solar Chargers to Have for Emergencies

    Small portable solar charges for small devices
    by Jason Wiskerchen

    Monday, November 19, 2012, 7:26 PM

A review of some of the innovative small solar chargers to have available for emergency situations.

http://www.treehugger.com/gadgets/best-solar-chargers-have-emergencies.html

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One Comment

  • Wed, Nov 21, 2012 - 6:51pm

    #1
    gmeader3

    gmeader3

    Status Member (Offline)

    Joined: Jan 13 2009

    Posts: 3

    Inexpensive, practical solar chargers (not in this article...)

    The chargers in this article are high-end, expensive, fancy – some are ultra-lightweight systems designed for backpacking. The smaller versions are often too low powered – with recharge times longer than one day's worth of sun – not too practical. They are very expensive compared to a budget charger you can put together that will work just as well at home.

    Solar chargers are pretty simple. Here are some practical suggestions that will provide a reasonable recharge time and enough power to run devices for many hours.

    You need three items:

    1. Solar panel – price varies depending on power requirements of what you are charging, see below
    2. Charge controller – about $35 on ebay
    3. 12V battery – varies, see below
    4. optional: automobile plug USB charger – attach to battery to charge USB devices – about $10

    for charging cellphones:

    • 10 watt solar panel – about $30 on ebay
    • 5 Ah 12V sealed deep cycle battery = 5000 mAh will run a cellphone for many days – about $30 on ebay

    for charging laptops:

    • 40 watt solar panel – under $100 on ebay
    • 25 Ah 12V sealed deep cycle battery = 300 watt hours will run a laptop for 6 hours or so – seen for $70 on ebay

    Larger solar panels charge the battery faster. This can be important. Get the largest panel you can afford/transport/fit in your space. 100 watt panels with charge controller have been seen on ebay for $200. These would make a very robust laptop charging system that will work even on days with variable sunlight and quickly (a few hours) bring the battery back up to full charge in full sunlight.

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