UPS/Battery Experts Around?

[Off-The-Chart]

situation is that, my own 2kva UPS doesn't even last 5mins anymore, so I went and bought new batteries

installed them and then I decided to try and use a multimeter to maybe check status of the old batteries

now I notice that some of the batteries read 12V+ and then some read 10+ and 2 or 3 reads below 10
(this was "supposedly" when UPS read that the batteries were 100% charged)

now my question is: isn't that 12V+ still actually good or does over charge mean bad?

then, if the above is actually good, what else could then cause the UPS to not stay on? some other component damaged?

any1 that can give some more info regarding my current UPS maintenance?

 

[PsyWulf]

Most UPS' would say fully charged when the batteries stop accepting charge or the batteries average to 12.x
If the individual batteries at rest read less a day after a full charge there's likely dead cells,the batteries could even charge to 13+ but a load would instantly "drain" it

Lead has a limited lifespan depending on how you treat them

Sent from my F1 using Tapatalk

 

[Off-The-Chart]

Most UPS' would say fully charged when the batteries stop accepting charge or the batteries average to 12.x
If the individual batteries at rest read less a day after a full charge there's likely dead cells,the batteries could even charge to 13+ but a load would instantly "drain" it

Lead has a limited lifespan depending on how you treat them

thanx

popped into a battery place and yeah, they all seem kapput... sjoe

some I think you could probably still use with their SOH at about 50%+, but others were goners (couldn't hold charge at all)

lol, guy almost destroyed his R5k (what he said) machine, to test them, when his clips touched each other

now for another question: what is the likely chance of using Lithium on something that came with Lead Acid?

must the inverter/charger specifically be made for Lithium?

 

[M@tree2]

thanx

popped into a battery place and yeah, they all seem kapput... sjoe

some I think you could probably still use with their SOH at about 50%+, but others were goners (couldn't hold charge at all)

lol, guy almost destroyed his R5k (what he said) machine, to test them, when his clips touched each other

now for another question: what is the likely chance of using Lithium on something that came with Lead Acid?

must the inverter/charger specifically be made for Lithium?

Inverter needs to support lithium cells, but be prepared to pay up to 5 times more for the same capacity in Lithium.
Small Lead Acid (alarm battery) Lithium replacement is R1000 vs R200 for the Pb equivalent.
Also, UPS will never truly charge the batteries to full capacity, hence the damage is done already.
Inverter has a 10A charging circuit to ensure they are charged between power cut cycles, and to ensure each battery is correctly charged.

 

[PsyWulf]

Must the inverter/charger specifically be made for Lithium?

You do need to change the chargers too more than likely,the charge voltage and amperage are significantly different
A BMS would also be needed if the Battery pack you get doesn't have it natively
Lead is pretty much a dumb/analogue system comparatively

 

[Off-The-Chart]

last 1 @PsyWulf I promise...... (for today )

my UPS' battery config is serie, so 96VDC (8 batteries)

can that voltage be changed or is that fixed for your UPS?
(would like to lower it and maybe go parallel to something like 48V x2)

 

[PsyWulf]

[Guide] Connecting Batteries in Series & Parallel | BatteryStuff

Learn about battery configurations in diagrams - series, parallel, series/parallel - and how to connect two or more batteries properly for increased power.

www.batterystuff.com

3rd Picture

 

[Off-The-Chart]

[Guide] Connecting Batteries in Series & Parallel | BatteryStuff

Learn about battery configurations in diagrams - series, parallel, series/parallel - and how to connect two or more batteries properly for increased power.

www.batterystuff.com

3rd Picture

hehehehe, I knew I should have added in brackets "and not just simply changing from serie to parallel"

I know HOW TO do it, just want to know if ie in this case, my UPS comes 96VDC, if I can actually change it or if the UPS is set to that

like say if I wanted to take that 48V APC battery pack listed here, if I could then change my setup to 2x 48V plus the additional 48V pack

 

[PsyWulf]

hehehehe, I knew I should have added in brackets "and not just simply changing from serie to parallel"

I know HOW TO do it, just want to know if ie in this case, my UPS comes 96VDC, if I can actually change it or if the UPS is set to that

like say if I wanted to take that 48V APC battery pack listed here, if I could then change my setup to 2x 48V plus the additional 48V pack

Oh,your wording seems odd then
Are you asking can you just slap in a solo 12v battery for example and the UPS will still work?
No
Input voltage is input voltage

 

[PsyWulf]

Or are you asking if a UPS taking 1 48volt battery could take 3x 48volt basically
Yesish
In Parallel,but the charger might take strain/take long to charge them to full which could shorten their lifespans

 

[Off-The-Chart]

hehehehe newb

Or are you asking if a UPS taking 1 48volt battery could take 3x 48volt basically
Yesish
In Parallel,but the charger might take strain/take long to charge them to full which could shorten their lifespans

that

well if the charger couldn't handle it, I don't think the thing would have come with an access port for adding an external battery

well, I would hope so 🤔

 

[PsyWulf]

hehehehe newb



that

well if the charger couldn't handle it, I don't think the thing would have come with an access port for adding an external battery

well, I would hope so 🤔

Comment was in general

These big boy rackmount/server UPS usually have umbilical ports for slaving extra packs which usually works well enough
What brand have you got?

 

[Off-The-Chart]

Comment was in general

These big boy rackmount/server UPS usually have umbilical ports for slaving extra packs which usually works well enough
What brand have you got?

Proline UPSI2000

thing is, I can see mention of "extended unit" in the manual, but can't see much else about such units ever being available

this one has a port, but sadly it isn't fitted with something like a plug/connector to simply add an external pack
(but think one could be added)

 

[Off-The-Chart]

@PsyWulf why do you think they made this thing 96VDC?

think that is a downside for me now

 

[PsyWulf]

More efficient power conversion,cheaper components use to provide the same wattage,easier? Could be quite a lot of reasons

 

[Off-The-Chart]

@PsyWulf @https://carbonite.co.za/index.php?members/wi%E2%84%A4ard.156/ @eleventh

is there something significant that I will lose if I swap to an inverter setup?

online conversion? (not even sure what that does so)