Modifying a RCT2000VA UPS with an External charger

BigEars

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Feb 22, 2015
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Or can I plug the power of the ups out, but it's still connected to the battery terminals. The external charger will be permanently connected and switched on. Can this work perhaps.

All the plugging this in and plugging that out and switching this on and that off.....is not the way to go. You are going to make up Fup somewhere sooner or later. Do have loadshedding tonight?
 

thehuman

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All the plugging this in and plugging that out and switching this on and that off.....is not the way to go. You are going to make up Fup somewhere sooner or later. Do have loadshedding tonight?

hope he is not hinting towords running ups as if it an online ups :(
 

thehuman

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How many amps can external charger provide ?
What load % is ups running at ?
 

KOPITE

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All the plugging this in and plugging that out and switching this on and that off.....is not the way to go. You are going to make up Fup somewhere sooner or later. Do have loadshedding tonight?

Yeah, I hate all these plugging in and out, faking moronic
 

ld13

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All the plugging this in and plugging that out and switching this on and that off.....is not the way to go. You are going to make up Fup somewhere sooner or later. Do have loadshedding tonight?

I fail to see all the plugging in and out and in and out. KOPITE is suggesting a once-off plugging out of the power feed to the UPS and instead keeping the charger connected to the battery terminals directly. As in, forcing the UPS to become an online UPS with the inverter functioning 24/7? The poor inverter... and it is going to be noisy.
 

KOPITE

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I have 2 lugs connected to the batteries and the cables running to the charger
 

thehuman

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Do you have software loaded ?
That pic saying 4%
I am trying to figure out how deep you will discharge battery in 2 hours
This will give me an indication how fast you can get battery recharged.
 

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KOPITE

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Do you have software loaded ?
That pic saying 4%
I am trying to figure out how deep you will discharge battery in 2 hours
This will give me an indication how fast you can get battery recharged.

Yes I have Viewpower software loaded on my laptop. Do you want me to check the load when I charge the batteries. I normally plug it init the ups when charging. But I charge it from the external charger now, so cannot check it now
 

BigEars

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Feb 22, 2015
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hope he is not hinting towords running ups as if it an online ups :(

So he has to always be watching the setup...Eskom fails...manually plug in UPS wires. Turn external charger off (gotta be watching when Eskom comes back).....way too complicated. Asking for trouble.

My 2c.

Yes, there is a solution that is way simpler. I need a RCT2000 on my bench in front of me and I will figure out a SAFE solution that requires no radical mods. I will speak to the powers that be here Tomorrow to see if they are interested.

If it is safely do-able I will find it. Seeing it's such a popular UPS solution it will probably be worth our time and money.

Don't **** with stuff now tonight. Don't try anything yet.
 

thehuman

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If internal charger of ups is current limited to max 2amps
And external charger can give extra 12 amps
So thats a max of 14 amps
If bateries 50% empty
Will take about 4 hours to charge back to near 100%
Will not hurt ups as it thinks external charger an battery
 

KOPITE

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If internal charger of ups is current limited to max 2amps
And external charger can give extra 12 amps
So thats a max of 14 amps
If bateries 50% empty
Will take about 4 hours to charge back to near 100%
Will not hurt ups as it thinks external charger an battery

Internal charger is 10 Amps, but not sure if it switches off automatically.
External charger is 12amp 3 stage charger and I does switch off when fully charged.
Need to find out if internal charger does trickle when the batteries are fully charged.
So if I run both, it should charge 22amps.
I think there is also a setting on the external charger to charge longer then usual, not sure
 
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