Author Topic: Garage Door Motors Power Backup using UPS  (Read 674 times)

Offline KMX1

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Garage Door Motors Power Backup using UPS
« on: September 03, 2020, 09:28:47 PM »
I have two Eazylift Roller Type Garage Door motors.  They use a 24v backup battery each that costs around R500 per battery.  I have a spare 1000VA  Mecer UPS that I can use to power both motors to use it occasionally during a power failure.  I tested the powerdraw with my Watt Meter  and both motors together use about 9W in standby mode and 75W  to lower / 100W to lift a door.  There is no noticeable spike when the motor starts to roll.  I have only one question - Is this a good or bad idea?

Offline chrisc

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Re: Garage Door Motors Power Backup using UPS
« Reply #1 on: September 03, 2020, 09:50:36 PM »
Yes it will work but not the way I would manage it.  Seeing you already have a working UPS, you may as well use it.  You might consider a gel-type battery

Lead-acid batteries last longer if discharged to about 25% now and then.

Even the dealer cost of a 24 volt 3.5 a/h battery is approaching R430, so they will only get more expensive.
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Offline Heinrich

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Re: Garage Door Motors Power Backup using UPS
« Reply #2 on: September 04, 2020, 06:59:59 AM »
change the batteries to 2 x 7aH in series, charger should be able to handle it.
been using 3 gemini garage motors like that for 12 years now.
someone told me that i can make ice cubes with left over wine.
i am confused, what is left over wine?

Offline Gerlach

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Re: Garage Door Motors Power Backup using UPS
« Reply #3 on: September 04, 2020, 07:41:19 AM »
Yes it will work but not the way I would manage it.  Seeing you already have a working UPS, you may as well use it.  You might consider a gel-type battery

Lead-acid batteries last longer if discharged to about 25% now and then.

Even the dealer cost of a 24 volt 3.5 a/h battery is approaching R430, so they will only get more expensive.

I'm with Chris on this on. You already got the UPS, just get a nice Carbon or Gel battery and use it like this. There is some other options but it's going be expensive.
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Offline KMX1

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Re: Garage Door Motors Power Backup using UPS
« Reply #4 on: September 05, 2020, 06:12:16 PM »
Thank you very much for the advice.  Can you recommend a place to buy Gel batteries?

Offline chrisc

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Re: Garage Door Motors Power Backup using UPS
« Reply #5 on: September 05, 2020, 09:18:15 PM »
Ask RSEC in Bergvliet in Cape Town
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Offline KMX1

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Re: Garage Door Motors Power Backup using UPS
« Reply #6 on: September 10, 2020, 11:06:54 PM »
change the batteries to 2 x 7aH in series, charger should be able to handle it.
been using 3 gemini garage motors like that for 12 years now.

I actually decided to go this way and have 2 gel batteries in series - It seems to work fine.  Just a another (stupid) question for the electricty experts.  I need 12v power for something at the doors - Can I pick up power from one of the two batteries while it is connected in series with another? Could not find the answer to this on Google.

Offline Family_Dog

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Re: Garage Door Motors Power Backup using UPS
« Reply #7 on: September 11, 2020, 01:41:12 PM »
Not the correct way of doing things, so no. It will work but will lead to quicker discharging and improper charging of the battery that you so use. Correct way is a DC Converter, 24v - 12v of sufficient amperage rating for your requirement, still cheaper than replacing batteries.


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Offline Heinrich

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Re: Garage Door Motors Power Backup using UPS
« Reply #8 on: September 16, 2020, 01:39:26 PM »
what do you need 12v for?

something low current?
someone told me that i can make ice cubes with left over wine.
i am confused, what is left over wine?