Maintaining UPS/car batteries

[talhawaleed]

What are the advantages and disadvantages of 12v UPS and 24v ups

i have modified the main thread to answer your question, see at end where i have explained the 12 Volt ups system vs 24 volt ups system

[galant1]

@talhawaleed

Awesome thread so far.

What I extract from your main thread is "backup time of both systems 12v and 24v is same". Is this right?

But this confuses me:

In 24v system with two batteries same load runs for eg 3 hours whereas in 12v with parallel combination, more load can be added but run same time and hence more load can be run in same time as in 24v. If in 12v with parallel combination, if half load will run and hence back up time increase to many hours if half load will run and half load off. Is this right?

[cursedd]

@talhawaleed

Awesome thread so far.

What I extract from your main thread is "backup time of both systems 12v and 24v is same". Is this right?

But this confuses me:

In 24v system with two batteries same load runs for eg 3 hours whereas in 12v with parallel combination, more load can be added but run same time and hence more load can be run in same time as in 24v. If in 12v with parallel combination, if half load will run and hence back up time increase to many hours if half load will run and half load off. Is this right?

in 12v parallel combination load can be doubles for the same amount of time consumption.
yes backup time increases

[talhawaleed]

@talhawaleed

Awesome thread so far.

What I extract from your main thread is "backup time of both systems 12v and 24v is same". Is this right?

But this confuses me:

In 24v system with two batteries same load runs for eg 3 hours whereas in 12v with parallel combination, more load can be added but run same time and hence more load can be run in same time as in 24v. If in 12v with parallel combination, if half load will run and hence back up time increase to many hours if half load will run and half load off. Is this right?

read at the end of the main thread modified to answer the same question, which i am going to copy here.

"Connecting batteries in series doubles the voltage but AMP-HR rating for the system would remain same. Which just says that formula which is applicable for calculating the maximum allowable charging rate for 12 Volt battery bank will also apply to a 24 Volt battery bank. Let me explain this with example, if you have 160 AMP-HR battery connected with 12Volts system then maximum allowable charging rate for this case is 160/10=16, now if you have two 160AMP-HR batteries connected in series on 24Volt system then again maximum allowable charging rate will again be 16 amperes for this setup, it’s just that now you can run the same load for double the time on 24Volts setup.

If novices does not wants to confuse himself, then don’t read further. You must be thinking that I can connect two batteries of same capacity on 12 Volts UPS system in parallel configuration which will also double the backup time. Then answer is that you are right, but here you will have to add up the AMP-HR capacities of both the batteries in-order to calculate the new maximum allowable charging rate and discharging rate.

In parallel configuration with two 160 AMP-HR batteries, you can now charge your system at 32 amperes of maximum allowable charging rate as current divides in parallel configuration. So in short, if your 12 volts one battery could have lit maximum 15 of the energy savers for one hours than 24 battery bank can light the same for 2 hours. Now, once you will add two batteries in parallel on 12 Volts system then you can increase the number of bulbs to 30, can either lit those 30 for one hour or turn 15 off to light yet another 15 for two hours. Hope, you must have got it as I could not make it simpler this this.

P.S: in above example, I have ignored the limitations imposed by UPS on a battery bank, like few have safety switches, which will go off if you will try to light 30 energy savers for 1 hour on 12 Volts system with two batteries in parallel."

[wasim625]

Thanks talha

[myhonda]

Last month our electricity bill was around 8K and I noticed that UPS was always charging, so I disconnected UPS because now a days there is no load shedding and this month electricity bill of around 2.5K came.

which ups r using .. normally branded ups cut off the battery when the battery reached to 13.7volts ....... our APC UPS dus this ...... its charger is automatic .......

[myhonda]

Thanks bro. I will buy tomorrow.
If shopkeeper prepares the battery he will put it on heavy charging right after pouring the electrolyte. They literally boil the electrolyte :S
i want to charge it on ups after half hour. Is it okay ?

yes whenever u buy a new battery only charge the battery for half an hour at his shop n let ur ups charge does the remaining part

[myhonda]

any one interested in buying APC UPS thn do contact us .........

Murtaza Ajmi Khan
Sales & Marketing Lead
Cell: +92 321 499 70 60
murtaza@uwt.com.pk

UniWorld Technologies
Flat # 7, 3rd Floor, Tariq Centre, HIII, Johar Town, Lahore. 54770- Pakistan
Phone: +9242 3595 14 95, Fax: +9242 3617 04 99.
Email: sales@uwt.com.pk, support@uwt.com.pk
URL: UniWorld Technologies
FaceBook Page : www.facebook.com/APCUPSSYSTEMS
LinkedIn : UniWorld Lahore
Skype Id : murtaza.ajmi1

[waqar19]

Bought AGS GX132 @9500 pkr

[myhonda]

Prices For APC UPS 2015

Dear All,

We have following APC small rating UPSs in stock :

1 KVA 13,500/-

1.5 KVA 17,500/-

2.2 KVA 25,500/-

3 KVA 30,000/-

Apart from these small rating UPSs, we have high rating UPSs. For more detail contact us in following under numbers .........

Best Regards

Murtaza Ajmi Khan
Sales & Marketing Lead
Cell: +92 321 499 70 60
murtaza@uwt.com.pk

UniWorld Technologies
Flat # 7, 3rd Floor, Tariq Centre, HIII, Johar Town, Lahore. 54770- Pakistan
Phone: +9242 3595 14 95, Fax: +9242 3617 04 99.
Email: sales@uwt.com.pk, support@uwt.com.pk
URL: UniWorld Technologies
FaceBook Page : www.facebook.com/UniWorldTechnologies
LinkedIn : UniWorld Lahore
Skype Id : murtaza.ajmi1

[khurram_y3k]

Hi all,

I have just bought a new battery from Metro and have also purchased a cane of electrolyte from Pyro Chemical. Now my question is

Can i fill the battery with required electrolyte and than charge it with my UPS or have to take it to battery shop for first time charge?

The quick response from senior members here is requested as my current battery (AGS -165) is only giving me back up of 15 - 20 min with 1 fan.

Thanks in advance

[khurram_y3k]

...........

[whiteangel]

You don't need to take it to the battery guy. Just hook it to your UPS and let it charge fully before trying to connect any load to UPS.

[Ishtiaq778]

Hi all,

I have just bought a new battery from Metro and have also purchased a cane of electrolyte from Pyro Chemical. Now my question is

Can i fill the battery with required electrolyte and than charge it with my UPS or have to take it to battery shop for first time charge?

The quick response from senior members here is requested as my current battery (AGS -165) is only giving me back up of 15 - 20 min with 1 fan.

Thanks in advance

Dear.....best option is to get initial charge from battery guy............

[Ishtiaq778]

Ups charge the battery at high rate of charging ampere. Initial charging is done at very slow rate of amperes. If not possible then do what whiteangel said.

[nasirjavaid]

Ups charge the battery at high rate of charging ampere. Initial charging is done at very slow rate of amperes. If not possible then do what whiteangel said.

@ishtiaq778 bro can you explain in little detail what should be initial charge amps and for how long it should be charged? what should be the cut off.
I think if we set ups amps accordingly then can charge it with ups too.. am I right?

But yeah loadsheding is another issue... what if light goes while initial charging... is it ok?

[galant1]

My battery Volta NS175 almost 3 years old is throwing acid out from closed cap. Recently changed the acid with new one. The acid level is fine not overfill and caps are tight enough but still acid is coming through closed cap.

Can any expert tell why battery is throwing the acid out of closed cap?

[whiteangel]

Dear.....best option is to get initial charge from battery guy............

You are right, it's better to give a slow charge initially, but none of the battery guys slow charge batteries, because every customer wants the battery in a couple of hours. Battery guys always charge on higher current to get the battery out as soon as possible, and put the next battery on charge.

Best is to get your own variable charger. I have one at home and use it occasionally to slow charge batteries.

[black88]

i bought a honda civic 1.8 2008.2 months back it has volta maintenance free battery in it.everything was quit perfect but some days back i parked ghe car for 3 days and after that when i started it made some jercks but got started.i guess might be some reasone and didn't done anything.now my car was parked for almost a whole week.and when i tried to start today was unable to start.battery was fully dead.when i inspected it showed white signal (needs charging).i started the car with help of another one.and drove it almost an hour thought that it would be charged as usually wet batteries do.but signal was same white.kindly suggest me what to do now what would be the solution for it? Changing battery or any maintenance?

[talhawaleed]

i checked voltage and it drops quickly to 10v within half hour and ups turns off.
then checked on desi ups for 1.5 hour @200 watt load. voltage remained constant at 10v for one hour then dropped to 9v and remained constant for another half hour.
Now i am buying new battery. so please suggest

you should try to slow down the charging rate to somewhat 5 amperes, then test the system.

i am very positive that you batteries are ok.

p.s: maybe flush, good electrolyte and ups adjustment will restore the backup time.