Elevator backup power [RE-wrenches]

[Andy Tyson]

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We are currently working on a house with wheelchair lift as well. His 
lift includes a UPS for lowering and gate operation. In our case the 
client will be happy on ground floor if power is low, and the UPS can 
get him there.
-Andy

>Friends:
>
>I have a prospective client who has requested I propose a backup only
>system.  There is no convenient space on his property for PV nor is wind an
>alternative.  He wants a grid charged battery back up system.
>
>The client is in a wheel chair and one of the loads he wants backup for is
>an elevator.  He also wants to backup two refrigerators, a home office, an
>electric gate, etc.
>
>I am apprehensive about the possibility that the client will choose to get
>in his elevator while the batteries may be low and half way down (or up)
>the inverters conk out on a low battery condition.
>
>I have thought of putting a battery monitor in his elevator and instruct
>him not to use the elevator below a certain voltage.  I could also lengthen
>the Low Battery Cut Out time so that the inverters will not shut down on a
>battery sag created by running the elevator.  I will also recommend a
>telephone in his elevator if he doesn't already have one.
>
>Any other suggestions?
>
>
>Thanks,
>
>William
>
>__________________________________________________________________
>William Miller
>SLO Communications: Communications and Power Systems Consulting
>PO Box 50, Santa Margarita, CA 93453
>Voice :805-438-5600		Fax: 805-438-4607	VMail: 805-546-4875
>email: wrmiller at slonet.org
>License No. C-10-773985
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