Must read before buying new battery (UPS or Car)

[Ishtiaq778]

Dear, this is the most basic and old kit installed in your UPS. First of all remove the tow wires from the kit which are attached to plates( Biasing volts wires)
connect the ups with battery , switch it on battery No AC supply, take digital voltmeter, place one probe on negative terminal of battery and second probe on the kit points where from u removed the biasing wires. If there are 4.5 to 5 Volts in each point, your kit is ok.
If LED are not on, closely inspected the led connections, may be grounding wire is broken.
If u find the kit,100% OK then i suggest you to buy UPS module having six FETs on each side may cost u 700Rs. Remove these Faulty plates and install that module for better results.

[nasirjavaid]

Just reached home and inspected the kit from under side....its D101 .....and shocked to find that it was already repaired ... as youcan see from the pic at the end...

I have my digital volt meter lcd broken last week so for now I think I should change the module and kit both...and keep this kit for emergency when suddenly if other kit breaks...

However I already tried removing these wires and connecting ups to battery without AC supply and noise from transformer was gone as if normal operation... but connecting biasing wires to kit again gives too much noise...

please suggest if this combination is fine or there is better transistor to replace 150M?

2 new plates with IRFP 150 M and Imran & Co. D-104 kit

Below part looks repaired

[Ishtiaq778]

Dear get imran and co module and ic104. Purchase both items by yourself. Go to ups repairing workshop..and get these items replaesed.stay clsoe to technician to watch each step. It will help u in future

[Ishtiaq778]

Charging amperes should be 10% of battery capacity. Before connecting new ups set up get recharge ur battery upto 1.250 specific gravity.

[nasirjavaid]

Thank you dear for helping out...
As I am in Lahore so will go to hall road and get both things from imran & co. And get items from them....
I have heard these ready made modules get burned easily in peak summer???
So can I use my irfp150m plates with ic 104?
If connections are same then I may connect myself.

[Ishtiaq778]

With ic 104 kit no issue of burning module. On module fet are used which are quit powerful like irf. If amperes are properly set then no issue of burning module

[nasirjavaid]

Ok, thanks dear... tomorrow I will be going to hall road and update when back..

[nasirjavaid]

Bought IC-105 (IB-4) Imran brothers kit and 75NF75 (10+10) 2000W module and got it installed by the mechanic... My UPS is 700 watts but the mechanic recommended to use 2000W module and said it will prevent from blowing out. I wonder how much it is true???

Will it affect load on ups when light goes? or its fine to use it.

[nasirjavaid]

@ishtiaq778 ... Observing following issues since installed new kit+module....

1- Charging amps were set to 12amps but I checked and after couple of seconds they fall to 0 and then again start rising till 12... then after 4-5 seconds they fall back to 0 and then after 2 seconds again start to rise till11-12. This happens 5-6 times and then amps settle to 7-8 .

2- Even battery is full when light goes out and ups is running only 1-2 energy savers of 23 watts, battery immediately drains up to 9.8 volts and keeps there... if I remove all load from ups even then it keeps till 10.0 - 10.5 volts. While my old kit was keeping voltage till 11.5 - 11.8 volts even under load of lights and fan and gave backup upto 4 hours..

Any idea what is the cause??? Kit or module faulty? how to test?

[Ishtiaq778]

@Ishtiaq778 ... Observing following issues since installed new kit+module....

1- Charging amps were set to 12amps but I checked and after couple of seconds they fall to 0 and then again start rising till 12... then after 4-5 seconds they fall back to 0 and then after 2 seconds again start to rise till11-12. This happens 5-6 times and then amps settle to 7-8 .

2- Even battery is full when light goes out and ups is running only 1-2 energy savers of 23 watts, battery immediately drains up to 9.8 volts and keeps there... if I remove all load from ups even then it keeps till 10.0 - 10.5 volts. While my old kit was keeping voltage till 11.5 - 11.8 volts even under load of lights and fan and gave backup upto 4 hours..

Any idea what is the cause??? Kit or module faulty? how to test?

Dear , i suspect your battery is faulty, one or more cells are short. How old is your Battery?? What brand???
Your kit and module seems ok, 0 and then again start rising till 12... then after 4-5 seconds they fall back to 0 and then after 2 seconds again start to rise till11-12. This happens 5-6 times and then amps settle to 7-8 .
This is the normal behavior off this kit while charging, Usually this kit does 3 times 0 to max,charging and 4th time it stays where the ampere are set 12 amp as in your case.
Plz get check your battery first, do you have hydrometer???

[Ishtiaq778]

What is battery full cut off point???
How old is your battery???
post a pic of battery cells by removing caps, may be i can tell u the condition of your battery.

[nasirjavaid]

Dear , i suspect your battery is faulty, one or more cells are short. How old is your Battery?? What brand???
Your kit and module seems ok, 0 and then again start rising till 12... then after 4-5 seconds they fall back to 0 and then after 2 seconds again start to rise till11-12. This happens 5-6 times and then amps settle to 7-8 .
This is the normal behavior off this kit while charging, Usually this kit does 3 times 0 to max,charging and 4th time it stays where the ampere are set 12 amp as in your case.
Plz get check your battery first, do you have hydrometer???

Phew!!! there goes one issue resolved .... the point is with previous kit battery voltage stayed @ 11.5 - 11.8 under couple of savors and a fan's load..... and used to give 3-4 hours of backup easily then how can it become faulty suddenly ???
Yes I have hydrometer and I am attaching each cell's pic plus hydro reading on one cell seems different but can't trust its reading as it looks broken... tomorrow I will buy new hydrometer and test again...

What is battery full cut off point???
How old is your battery???
post a pic of battery cells by removing caps, may be i can tell u the condition of your battery.

Cut off voltage was set to 12.7 (now changed to 14.4)
Battery is almost 1.5 years old now.
Posting the pics below..

[nasirjavaid]

Also on black battery lead its drawing 4-5 amps and on red lead 6 amps.... do you think its normal to draw this amount of amperage on inverter mode???

Battery normally stays at 12.3 -12.4 volts hence cells seem fine and it should not drain battery under no load which it does...it drains battery to 10 v even all load is removed from inverter ... could it be due to 2000w (10+10 FET) module ???

[margallar]

batteries look worn to me

[Ishtiaq778]

Dear nasir, when did u change battery cutt off volts to 14.4??? The volts drop of battery upto 10V is because of short cell.BUT as u mentioned, u changed its cut off volt 14.4 which was previously 12.5, then this is the culprit. No issue with big module, do one test.
Remove the load plug from back of ur ups, and then measure the amperes drawn by ups from battery, If that amperes are 2 to 3 then its fine,

[Ishtiaq778]

Don one thing to test the battery , set free the battery cut of volts, means , ups should not full the battery, let ups charging the battery, for 24 hours till battery slightly warm up, measure the volts of battery, note it, and then slowly operate the variable to stop charging.

[nasirjavaid]

Dear nasir, when did u change battery cutt off volts to 14.4??? The volts drop of battery upto 10V is because of short cell.BUT as u mentioned, u changed its cut off volt 14.4 which was previously 12.5, then this is the culprit. No issue with big module, do one test.
Remove the load plug from back of ur ups, and then measure the amperes drawn by ups from battery, If that amperes are 2 to 3 then its fine,

Dear as I think if battery cell is short they battery voltage should be around 10.5 v due to one short cell... but battery has resting voltage of 12.3 - 12.4 volts which means its cell can't be short...
I mentioned previous cut off was 13.7 which I changed to 14.4 ...
I will be going to get new hydrometer shortly and then test SG of each cell again and do the amps test without load plug and share results here...

UPDATE: amps without load plug is 1.7 on black and 3.6 on red wire

[nasirjavaid]

Don one thing to test the battery , set free the battery cut of volts, means , ups should not full the battery, let ups charging the battery, for 24 hours till battery slightly warm up, measure the volts of battery, note it, and then slowly operate the variable to stop charging.

hmmm...any specific amps to set for this?? due to loadshedding battery will be used during that one hour ...is it ok??

I am running 23w and 18w savor only and ups beeps after 42 minutes for low battery (low batt set to 9.3v)

[Ishtiaq778]

hmmm...any specific amps to set for this?? due to loadshedding battery will be used during that one hour ...is it ok??

I am running 23w and 18w savor only and ups beeps after 42 minutes for low battery (low batt set to 9.3v)

No need to alter charging ampere if set at 12 amperes, do this what is said in last post, if backup time of your battery is impoved then ur battery is ok,
observe each cell while charging, bubbles should come out from each and every cell

[nasirjavaid]

Ok boss... will be doing same and report back... afsos aaj markets band hain so no hydrometer