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  1. squishem

    Recommendation for LONG run time UPS for small load

    Thanks all. I considered that approach too but stayed away for 2 reasons. 1) Need a solution which provided a sinusoidal output, the connected equipment is sensitive and does not work well with non-sinusoidal AC supplies. 2) I need hundreds and hundreds of these from a commercially...
  2. squishem

    Recommendation for LONG run time UPS for small load

    Thanks, but like I said in my post I can not change the device hardware. The device to be powered for 18 hrs has undergone certification and if I change anything in it, it will have to be re-certified incurring extra time and expense. The customer is well aware of the extra costs incurred by...
  3. squishem

    Recommendation for LONG run time UPS for small load

    I have a special need for a long run-time for a very small load. I need to maintain a 50W load for 18+ hours in case of power failure. I have done the math and figured out a cheap solution using an automotive lead acid battery and wiring it into the power supply with the required extra...

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