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smoke alarms on inverter

Discussion in 'Electrical Engineering' started by Don Miller, Sep 24, 2004.

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  1. Don Miller

    Don Miller Guest

    We've just built an off-grid retirement home and are having problems with
    smoke alarms that are required by local building codes. Three out of seven
    of them 'chirp'. They are interconnected and mains powered with individual
    battery backups on each one. We've replaced all their backup batteries and
    they still chirp. I doubt that we have almost half of them bad right out of
    the box.

    Our inverter, etc is a brand new powercenter DR2424 from Trace/Xantrex. It
    runs lights just fine. As almost any inverter would. We don't have any
    other loads on the system. All appliances are propane so we don't mind the
    minor constant draw of the smoke alarms.

    No, I haven't tested the voltage and frequency the inverter puts out.
    Simple answer is that I don't have the meters to do so.

    Do smoke alarms need sign-wave power?
    Do smoke alarms need EXACT voltage.
    Do smoke alarms need EXACT frequency.
    Suggestions?

    Thanks,

    Don
     
  2. Make, model of detector?

    Charles Perry P.E.
     
  3. There are dc powered alarms. Contact an alarm company. We use these
    all the time in communication shelters.


    Bill Kaszeta
    Photovoltaic Resources Int'l
    Tempe Arizona USA
     
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