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Reliable emergency backup power for disasters

Discussion in 'Amateur Radio News' started by OH8STN, Sep 14, 2019.

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  1. OH8STN

    OH8STN Ham Member QRZ Page

  2. W4FID

    W4FID XML Subscriber QRZ Page

    This is a good video. Worth the half hour to watch it. If you're new it gives you all the starting points you need to consider and learn about so you know where/how to get started. If you're experienced it's a good check list for you to see if you have covered all the bases and are really good to go like you think you are. For whatever my opinion s worth I have been active in emergency things at both local and regional levels for about 50 years -- going back to tube radio days -- and have a complete dedicated portable/off the grid station HF thru 440. I was glad I took the time to watch this.
     
    KK4HPY and NU4R like this.
  3. 2E0IGG

    2E0IGG Ham Member QRZ Page

    hi this video makes you think although my radio would work if the power and internet went down for some reason it high lights how i would power my radio for more than a couple of hours

    2E0IGG
     
    NU4R likes this.
  4. N7GWA

    N7GWA Ham Member QRZ Page

    WOW! Great video. I do have a couple questions, What's the advantage of using a Lithium ion battery as opposed to a sealed lead acid battery? Secondly, could you elaborate on the small battery pack you are using?It looks like theres a small circuit attached to the top of it. I'd love to see more of your home emergency power setup, what kind of batteries are you using for it?
     
    NU4R likes this.
  5. ZS1LEM

    ZS1LEM Ham Member QRZ Page

    A very nice explanation on how to be portable and off grid.
    I used a similar system in the park yesterday, I used 2 X 100 watt semi flexible solar panels, a MPPT charge controller and a 100 A/H 12 volt Gel battery. I was able to easily power my Kenwood TS-480 HF rig and my laptop using a small 12V to 220 V AC inverter and run a 25 watt 2M rig. I could charge my cell phone using a 12V cigarette lighter charger plugged into the 12V battery.
    It is amazing what you can do with a solar panel, a charge controller and a 12V battery.
    ZS1LEM
     
    NL7W, WA2LXB and NU4R like this.
  6. KJ7CNN

    KJ7CNN Ham Member QRZ Page

    If you're able, info and or links to your preferred components would be helpful for us to source the tested and proven pieces to these puzzles.
     
    N0YPD and NU4R like this.
  7. W9PCS

    W9PCS XML Subscriber QRZ Page

    I used to be a lead acid guy myself. A few years ago we had Mark from West Mountain Radio come to our club meeting and discuss the relative advantages of both.
    The short answer is LiFePO4 batteries deliver about 95% or more of their rated output at a useful voltage. Many radios don't like the voltage that lead acids supply at the end of their discharge curve.
    I still have four 12V 155AH SLA batteries that I bought used a couple of years ago, and I will use them till they give up the ghost, but the do weigh about 100 pounds each and are a bear to move.
    The rule of thumb is a 100AH lithium will deliver the same useful power as a 200AH lead acid battery.
    They are expensive, but the price is coming down and you can assemble your own batteries from the many cell suppliers all over the internet.
    The circuit board is a battery management system. It limits the short circuit power that the battery will supply and will cut off charging if the cell voltage gets too high during charging.
    They are very light based on usable power delivered.
    Combine either battery with a portable solar panel and you can have a nice system.
    Here is a good place to start:
    https://batteryuniversity.com/
    It's been an interesting journey...
     
    N7GWA, KK4HPY and NA4RA like this.
  8. K2WPM

    K2WPM Ham Member QRZ Page

    Good summary.
    One more advantage to lithium, they can be recharged thousands of times.
    So, SLA may last you X years, whereas lithium is 5 or 10X.
     
    N7GWA likes this.
  9. NU4R

    NU4R Ham Member QRZ Page

    I work for Boeing on the 787.

    Batteries scare me.:eek:
    Good post sir and 73!
     
    N0TZU likes this.
  10. W6MJM

    W6MJM Ham Member QRZ Page

    Great video. I intend to show this at our local club meeting during our emergency preparedness session.
    I use a DC12 Mity GO-BOX with a 20 Ah LiFePO4 battery, Powerpole connectors, voltmeter and USB port. Works well for me for all my emergency needs. They also have a larger one called a DC12 MAX GO-BOX that holds larger batteries up to 50 Ah. They supply the box all built up with or without batteries. They are a good source for DIY parts for a power go-box. Look into it.
    W6MJM
     

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