This means if we draw 100 amps from a 100 amp hour battery, it will not last an hour. So what does the 100 ah mean? Does it mean if we draw 1 ampers, it will last 100 hours? Abit confused
most batteries have a minimum hour rating for example 100ah at 20 hours means in theory you can draw 5 amps for 20 hours but anything more than that and the math wont add up
According to initial voltage (12.5), battery was very discharge and probably disconnected for more than 6 months, that impacts the battery capacity, you should charge @14.4VDc for 24 hrs then let it float at 13.6 for 3 days before you can perform the capacity test. Thanks for sharing video, very interesting way to load a battery.
76A is too-too much for that battery. The writing on the side says 100Ah/20Hours which means max 100/20=5A discharge for 20 hours long (equals 12V*5A=60W max), and you will get max capacity (12V*100Ah=1,2kWh). Probably the 5h capacity is about 80 or 75Ah, which is 15-16A (12V*16A=192W max), your capacity will reduced (12V*80Ah=0,96kWh) compared to the 20 hours it is 20% loss. If you increase the current over 15A, you reduce the battery life, and you will experience capacity more capacity loss. If you want to use a hair dryier you will need 5 pieces from that battery in parallel, the 76A will not be a problem.
In other words, the lower battery temperature and the higher discharge current, the faster the voltage at its terminals will drop and, accordingly, the smaller capacity will be. The effect so-called "apparent" loss of capacity arises, when the supply of unreacted active substances is still sufficient, and the discharge has to be stopped due to an unacceptable decrease in the voltage at the battery terminals.
It clearly shows a discharge time of 20 Hours (C rating), and that is because of the internal resistance of the battery itself and with that discharge time you have a capacity of 100Ah. Also you should never charge a lead acid battery above 14,4 Volt.
@@alonzodesantis6989 No, I meant if you charge it above 14.4V it will start gassing (hydrogen, oxygen and hydrogen disulfide). If you discharge it with more than 5 amps, you won't get the full capacity of 100Ah since the C-rating is then less than 20 hours, and the battery will start to act like a series resistance, so it will eventually boil when a complete short circuit occurs.
I charged mine to 16V using a 100ma 23v max solar panel.The battery was incapable of going beyond 16V. There was no meaningful gassing as there was no discernible drop in electrolyte level. The level was higher than what I want from adding of retail chemical solids over the years. It's perfectly fine to charge above 14.4v at low amperage. Later, I charged using an AC/DC adaptor 18V 100ma for 2 months. The 18 years old battery was completely restored to 1.3 specific gravity for all cells. I didn't have the equipment to test for the capacity. Again the gassing was minimal. I could see gassing bubbles in the magic-eye port. There was no hope of dropping the electrolyte level.
I have a query. You have checked the efficiency using an AC to DC inverter. Apart from the losses during conversion, I think most inverters are set to trip the conversion when the battery is used/discharged around 50/60 % of it's total capacity. It means that the battery does not get fully discharged when it is tripped off by the inverter. I think If you can use a DC light of 10 amp and connect it directly to the battery terminal you would notice about 80% or more efficiency. Also, I think that when we put a load of 80 amperes on a 100ah battery then after few minutes 10/15 amps from the battery are consumed from it's total capacity. So it becomes impossible for the battery to supply 80amp together and so the inverter trips. I think the battery does not get discharged fully in this case and one can still use smaller loads for e.g 10 amp for several hrs from the same battery. COMMENTS FROM OTHERS ARE STRONGLY WELCOME. thanks.
lead acid are the worst for drawing long periods of current, they arnt designed for it, lithium iron phosphate are. but I'm sure you know this. by the way charging at 15.1 will hurt the battery, turn it down to 14.4 then to 13.8 then let it sit there for 2 hrs so the charge can be fully absorbed.
Don't think perhaps it is a good idea to discharge the battery at such a high rate. AH capacity does not mean you can discharge at 100A or anything like that figure. you'll just fry the battery.
Not the same. Meter connect to to battery terminal. 0.9v drop on the wire. If you connect the meter at the power supply terminal it will tell the same value
OMG, Yes! Nobody takes that into consideration! Most ammeters are pretty much RMS devices. I have a clamp ammeter that records PEAK output, and on a switching inverter, the current shown could be as as much as 25% higher than steady state. Calibrated resister banks should be used to test battery capacity IMO.
this is not a correct capacity test you should have a meter inline on the dc side to check capacity i found filament bulbs for the ampage you want to draw are best
That battery is design for solar panel charging with solar control pwm device .the charger you used is not compatible with that particular battery..you thought that fully charges but isnt..used a compatible charging device instead .so that .well.you will know
Boss ask ko lang po .kailangan po ba patayin ng breaker na panel to controller pag hindi na nagchacharge? Para po kasing humihigop pabalik ng kuryente. .bumabawas po battery ko
Mr kim, what might be the cause for the battery that lower it's efficiency rate just like ur first test then after series of charging and discharging the efficiency getting higher than the previous testing?
I don't understand a damn thing y'all saying me and Einstein is no more friend so tell me directly if i can use that battery in my room just for my tv,bulb and my laptop😌
Les battery lead acid sont vraiment mauvaises 🤦🏻♂️. J’avais acheté deux 12v 150ah pour ma maison en pensent que j’irai tenir 3 4jours je ne peux pas tenir même un jours 🤦🏻♂️🤦🏻♂️🤦🏻♂️. J’ai regretté mon achat
- How to find battery power Power=voltage x current So for 100Ah Power = 1200W it mean this battery can supply power to load up to 1.2kW. But battery unlike generator, battery power could supply more than its rated power many times depending on the battery manufacturer datasheet.
This means if we draw 100 amps from a 100 amp hour battery, it will not last an hour. So what does the 100 ah mean? Does it mean if we draw 1 ampers, it will last 100 hours? Abit confused
Yes my friend, it would. For lead acid battery the more discharge current you draw the lest efficiency you got.
KIM Tinal so what is the max efficiency we can get from these batteries? is it possible to use all of the 1200 Wh energy and get a 100% efficiency?
I would be 1A or least discharge current to get 100% i guess. I only test for 5A the efficiency is up 58%
most batteries have a minimum hour rating for example 100ah at 20 hours means in theory you can draw 5 amps for 20 hours but anything more than that and the math wont add up
@@jamespartell5781 so that’s what that “x h” means. I wish there was more explanatory video or materials
According to initial voltage (12.5), battery was very discharge and probably disconnected for more than 6 months, that impacts the battery capacity, you should charge @14.4VDc for 24 hrs then let it float at 13.6 for 3 days before you can perform the capacity test. Thanks for sharing video, very interesting way to load a battery.
thank so much for your advice i will try
76A is too-too much for that battery. The writing on the side says 100Ah/20Hours which means max 100/20=5A discharge for 20 hours long (equals 12V*5A=60W max), and you will get max capacity (12V*100Ah=1,2kWh). Probably the 5h capacity is about 80 or 75Ah, which is 15-16A (12V*16A=192W max), your capacity will reduced (12V*80Ah=0,96kWh) compared to the 20 hours it is 20% loss. If you increase the current over 15A, you reduce the battery life, and you will experience capacity more capacity loss.
If you want to use a hair dryier you will need 5 pieces from that battery in parallel, the 76A will not be a problem.
ok thank for sharing my friend.
Congratulations your friend can thank you now for frying his new battery 👏
In other words, the lower battery temperature and the higher discharge current, the faster the voltage at its terminals will drop and, accordingly, the smaller capacity will be.
The effect so-called "apparent" loss of capacity arises, when the supply of unreacted active substances is still sufficient, and the discharge has to be stopped due to an unacceptable decrease in the voltage at the battery terminals.
It clearly shows a discharge time of 20 Hours (C rating), and that is because of the internal resistance of the battery itself and with that discharge time you have a capacity of 100Ah. Also you should never charge a lead acid battery above 14,4 Volt.
cycle charge 14.4 to 15v standby 13.5 to 13.8 for sla batterys
Are you talking about flooded lead acid because improper charging leads to equalization which is 15 amps
@@alonzodesantis6989 No, I meant if you charge it above 14.4V it will start gassing (hydrogen, oxygen and hydrogen disulfide). If you discharge it with more than 5 amps, you won't get the full capacity of 100Ah since the C-rating is then less than 20 hours, and the battery will start to act like a series resistance, so it will eventually boil when a complete short circuit occurs.
I charged mine to 16V using a 100ma 23v max solar panel.The battery was incapable of going beyond 16V. There was no meaningful gassing as there was no discernible drop in electrolyte level. The level was higher than what I want from adding of retail chemical solids over the years. It's perfectly fine to charge above 14.4v at low amperage.
Later, I charged using an AC/DC adaptor 18V 100ma for 2 months. The 18 years old battery was completely restored to 1.3 specific gravity for all cells. I didn't have the equipment to test for the capacity. Again the gassing was minimal. I could see gassing bubbles in the magic-eye port. There was no hope of dropping the electrolyte level.
I have a query. You have checked the efficiency using an AC to DC inverter. Apart from the losses during conversion, I think most inverters are set to trip the conversion when the battery is used/discharged around 50/60 % of it's total capacity. It means that the battery does not get fully discharged when it is tripped off by the inverter. I think If you can use a DC light of 10 amp and connect it directly to the battery terminal you would notice about 80% or more efficiency. Also, I think that when we put a load of 80 amperes on a 100ah battery then after few minutes 10/15 amps from the battery are consumed from it's total capacity. So it becomes impossible for the battery to supply 80amp together and so the inverter trips. I think the battery does not get discharged fully in this case and one can still use smaller loads for e.g 10 amp for several hrs from the same battery. COMMENTS FROM OTHERS ARE STRONGLY WELCOME. thanks.
Hi friend, very good video.!
i have one question how much time your last test last ?
I mean the 11a discharge test
lead acid are the worst for drawing long periods of current, they arnt designed for it, lithium iron phosphate are. but I'm sure you know this.
by the way charging at 15.1 will hurt the battery, turn it down to 14.4 then to 13.8 then let it sit there for 2 hrs so the charge can be fully absorbed.
I enjoyed the music more than the video
hahahaha
@@kimtinal9353 Exactly music name plox 😀 at 03:15
Don't think perhaps it is a good idea to discharge the battery at such a high rate. AH capacity does not mean you can discharge at 100A or anything like that figure. you'll just fry the battery.
yes, that's why it test discharge it many discharge current rate 80A to 5A
now I got it that I must buy double capacity battery for what I need
At 9:46 I don't understand why the meter reads 12.76 volts when charging the battery at 13.6 volts.
when the charging the battery the supply voltage must be high then battery to make the current flow,
@@kimtinal9353 But the leads of the power supply and the meter are both connected to the same terminals. How can they be at different potentials?
Not the same. Meter connect to to battery terminal. 0.9v drop on the wire. If you connect the meter at the power supply terminal it will tell the same value
@@kimtinal9353 Okay, I get it. Thanks.
How about the inverter did you used is still working until now...I have smaller kind of that one 500w.
how long was the third test and what was the capacity that you could take from the battery during test 3? thanks
the test is ok only problem is that your charging method is very questionable
can you share your opinion
@@kimtinal9353 use 10 A smps
What is wrong with my current power supply?
@@kimtinal9353 the answer is in your question....it is a power supply not a charger
@@allmor77 ok thank you
Hi
What is your opinion about the pulsations of the discharge current, caused by the inverter?
is there any experience with "flat" load?
OMG, Yes! Nobody takes that into consideration! Most ammeters are pretty much RMS devices. I have a clamp ammeter that records PEAK output, and on a switching inverter, the current shown could be as as much as 25% higher than steady state. Calibrated resister banks should be used to test battery capacity IMO.
where do you get 8kwh from and how does that = 0.330kwh, it makes no sense how the meter can say 8.12kwh when the battery capacity is ~1.2kw
I have a Topdon bt300p battery tester!
Is It possibile to test this type of battery? And if so, what inrush corrent should i type on the tester?
this is not a correct capacity test you should have a meter inline on the dc side to check capacity i found filament bulbs for the ampage you want to draw are best
The clamp meter is the shunt same difference in line or removable
@@alonzodesantis6989 amp meter does not count power used only current flow diferent tool
That battery is design for solar panel charging with solar control pwm device .the charger you used is not compatible with that particular battery..you thought that fully charges but isnt..used a compatible charging device instead .so that .well.you will know
Tnx for this video
So nice of you
good day sir' may i know what is the name of the device that you use beside the breaker
almost 5 mins used discharge the battery
Not 5 minutes
🤗🤗 Gutes Video 🤗🤗👍 Danke
Music sucks. Even silence is better
Thanks for your advice
are you very sure the actual load is 6.6kw,and are xou really sure the true rated watts of your inverter?
Interesting video, would a second battery connected parallel to the 1st battery help put out a constant 12v to the load?
Boss ask ko lang po .kailangan po ba patayin ng breaker na panel to controller pag hindi na nagchacharge? Para po kasing humihigop pabalik ng kuryente. .bumabawas po battery ko
About how many watts was it pulling at that many amps ?
Good Video
Mr kim, what might be the cause for the battery that lower it's efficiency rate just like ur first test then after series of charging and discharging the efficiency getting higher than the previous testing?
it is about the discharge current. the higher current you discharge the lower efficiency you get. this is Lead Acid battery fact.
@@kimtinal9353 thank you sir
Good job
What is the current for 100 ah battery
It proves nothing my friend your try..!
I don't understand a damn thing y'all saying me and Einstein is no more friend so tell me directly if i can use that battery in my room just for my tv,bulb and my laptop😌
yes you can use.
Best back ground music
Not
Les battery lead acid sont vraiment mauvaises 🤦🏻♂️. J’avais acheté deux 12v 150ah pour ma maison en pensent que j’irai tenir 3 4jours je ne peux pas tenir même un jours 🤦🏻♂️🤦🏻♂️🤦🏻♂️. J’ai regretté mon achat
How this sound start from invator? Plz help and say
sorry for late replay, the inverter sound is indicate that the battery voltage is reach its minimum state. the battery is empty. or discharged.
Like video
Terrible music makes this impossible to watch
not kwh its watts!!!
Wich game are you playing man
Am not understanding
How to find battery power 70 80 100Ah
How to calculate use discharge power
- How to find battery power
Power=voltage x current
So for 100Ah
Power = 1200W it mean this battery can supply power to load up to 1.2kW.
But battery unlike generator, battery power could supply more than its rated power many times depending on the battery manufacturer datasheet.