Can I use this for something.

Jean Claude Vaaldamme

Jean Claude Vaaldamme

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So someone game me this UPS. I think its old and was also in their garage a few years unused, so I guess the batteries will be gone.
Now firstly. I am not that bothered by load shedding at this stage, it is more of an inconvenience and I can still do most things and are definitely not planning on spending huge amounts of money on this thing. Was thinking more maybe the son could run his pc or 3d printer during load shedding.
So if anyone maybe know this.
Is it like an inverter?
Would you be able to fit other type of batteries. It looks like it takes 20x12V 7ah batteries and just replacing that seems way more expensive than buying a normal lead acid big battery with more AH, you could probably buy a lithium for close to the price of 20 of those small batteries.
Is it just a waste of time and money with today's technology and just get rid of it?
Am I going to blow my house up? :D

Comet EX 7 RT 3:1 | User manual | MGE UPS SYSTEMS | Manualzz

View online (7 pages) or download PDF (84 KB) MGE UPS Systems Comet EX 7 RT 3:1 User manual • Comet EX 7 RT 3:1 power supply units PDF manual download and more MGE UPS Systems online manuals
manualzz.com manualzz.com
IMG_3597 (2).JPG
IMG_3601 (2).JPG
IMG_3591 (2).JPG
 
Jean Claude Vaaldamme said:
So someone game me this UPS. I think its old and was also in their garage a few years unused, so I guess the batteries will be gone.
Now firstly. I am not that bothered by load shedding at this stage, it is more of an inconvenience and I can still do most things and are definitely not planning on spending huge amounts of money on this thing. Was thinking more maybe the son could run his pc or 3d printer during load shedding.
So if anyone maybe know this.
Is it like an inverter?
Would you be able to fit other type of batteries. It looks like it takes 20x12V 7ah batteries and just replacing that seems way more expensive than buying a normal lead acid big battery with more AH, you could probably buy a lithium for close to the price of 20 of those small batteries.
Is it just a waste of time and money with today's technology and just get rid of it?
Am I going to blow my house up? :D

Comet EX 7 RT 3:1 | User manual | MGE UPS SYSTEMS | Manualzz

View online (7 pages) or download PDF (84 KB) MGE UPS Systems Comet EX 7 RT 3:1 User manual • Comet EX 7 RT 3:1 power supply units PDF manual download and more MGE UPS Systems online manuals
manualzz.com manualzz.com
View attachment 1506441
View attachment 1506443
View attachment 1506445
Click to expand...
I had two similar units and bought batteries for them to see if it was worth it. It's not. Loadshedding and constant power issues in town killed the batteries within three months and it was back to being a very heavy, useless doorstop. Got rid of them a few months back.
 
Kung Fu Porkchop said:
I had two similar units and bought batteries for them to see if it was worth it. It's not. Loadshedding and constant power issues in town killed the batteries within three months and it was back to being a very heavy, useless doorstop. Got rid of them a few months back.
Click to expand...

What if you buy 20 x
stemarshop.co.za

Securi-Prod 7ah 12.8v Lithium (LiFePO4) Battery

High Cycle Life: over 3000 @ 80% Depth of Discharge, Suitable SLA Replacement – Gate Motor, Energizer, Alarm System, UPS, etc. Built-in BMS
stemarshop.co.za stemarshop.co.za

:D

Or replace the Battery module with an 12V 100AH LFP?
 
12V is the most perfect gift of sn old UPS, I ran for years on that before getting a proper inverter, I did not even have an external charger.

Get yourself a 12V 50Ah lithium and a lithium charger.

I still miss how silent my APC UPS was.
 
AlphaJohn said:
What if you buy 20 x
stemarshop.co.za

Securi-Prod 7ah 12.8v Lithium (LiFePO4) Battery

High Cycle Life: over 3000 @ 80% Depth of Discharge, Suitable SLA Replacement – Gate Motor, Energizer, Alarm System, UPS, etc. Built-in BMS
stemarshop.co.za stemarshop.co.za

:D

Or replace the Battery module with an 12V 100AH LFP?
Click to expand...
Yes that why I ask if one could connect normal big batteries to it. Buying 20 x 7ah lithium's will cost 16k and getting 140AH. I can buy 200ha lithium big batteries for a few k less.
 
Kung Fu Porkchop said:
I had two similar units and bought batteries for them to see if it was worth it. It's not. Loadshedding and constant power issues in town killed the batteries within three months and it was back to being a very heavy, useless doorstop. Got rid of them a few months back.
Click to expand...

Same with the house alarm battery. It got killed by load shedding and power issues. And that terrible beeping in the middle of the night when the power comes back on. I unplugged it when the battery fan ran constantly indicating an overheating battery and possible battery fire.
 
Jean Claude Vaaldamme said:
Buying 20 x 7ah lithium's will cost 16k and getting 140AH. I can buy 200ha lithium big batteries for a few k less.
Click to expand...
the spec plate of the battery module indicates DC 240V - i.e. you will always need 20 x 12V batteries, regardless of Ah rating, for that thing to work (batteries will be series connected). Highly unlikely to be running >3kW inverter/UPS on 12V (the battery cable thickness, for one thing, to carry that kind of current will become a problem).
 
one poster said:
the spec plate of the battery module indicates DC 240V - i.e. you will always need 20 x 12V batteries, regardless of Ah rating, for that thing to work (batteries will be series connected). Highly unlikely to be running >3kW inverter/UPS on 12V (the battery cable thickness, for one thing, to carry that kind of current will become a problem).
Click to expand...
Whoever was labelling that had a bottle in one hand, it's output 240V AC, not DC. Impressive that they managed to sell it like that.
 
I just read the OP and I see it takes 20x 12V batteries, it must have a pretty decent charger for that so maybe you won't even need an external charger.
 
you can easily repair it and even convert it to solar.
 
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