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Thread: Best solution for portable power

  1. #11
    Diamond Member AndyD's Avatar
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    I would look at a scalable lithium ion battery. These seem to be one of the popular ones and they have an agent in SA. https://www.ultrabatt.com/batteries They're not cheap but they're life expectancy is 3 or 4 times that of a lead acid battery and they're about 1/5th of the weight so you kinda get what you pay for.

    Then you'd need to decide whether to use a solar panel and charge controller or the alternator on your vehicle to recharge it.
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  2. #12
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    battery backup

    Quote Originally Posted by henny View Post
    Sorry, no, it runs of mains
    I know it is a long time since your query but I had the same problem and had a battery system made to suit me. No inverter. You say that your machine can run on 12V so why invert? During load shedding I have a 12V battery running my cpap machine (Phillips Respironics) for over 6 hours (tested). I did try and buy a commercial battery unit but was not satisfiedClick image for larger version. 

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  3. #13
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    This is my setup. The battery pack was made in Cape Town and does not use an inverter. I have tested the battery pack and it runs my Phillips Respironics CPAP machine for over 6 hours before the drop in battery voltage causes it to cut out. This is more than enough for use during power outages which have been 2 to 3 hours.
    There is no noise as with a UPS.
    It is comparatively small and the cost is reasonable.
    Click image for larger version. 

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