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  • in reply to: APC SU3000 UPS to 48V full time inverter conversion #64270

    i just found this forum, and maybe i can helf with this question, hopefully you have found the answer before now.

    with battery voltage connected, press the start button and hold it for approx 5 seconds, the unit will flash once when first pressed (most of the time) if it does just release and repress and hold the button down.

    you will hear a beep and then you can release the button and it will autostart.

    some start a bit faster than others, some beep more than others, some take a bit longer than 5 seconds of holding the button down.

    i have about 15kva of ups inverters racked up out in my shop

    some are 24vdc and others are 48vdc buss.

    been doing testing to determine which has the highest efficiency, surge capability etc.

    bob g

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