For a 40 hours discharge at 1.3A you only got about 52 AH, that does not jive with the 50AH you got at the 4.5 A discharge rate! I would like to know what you would suggest for a charger maintainer to recharge and care for the batteries. Dear Sir, I am using 6 volt 232 ah batteries for a battery bank. Since it would seem have a SEALED lead acid battery and it would only damage that seal to open it enough to add any form of liquid. They give me a NEW BATTERY. The second battery presented with significant fluctuations over the first 4 - 6 hours of the test, with in-circuit terminal voltages varying from 12.1V to 12.4V, going up and down over the 4 hour period before stablizing at 12.2V for about 10 - 12 hours. When the voltage reaches a certain value and you keep it there, the current will automatically start decreasing to near zero if you give it infinite time. multimeter set for 10A full scale) in series with the battery and check if the current is not above 5A. To Gary Mendenhall: 2 things to keep in mind here: - voltage should be clipped at 13.8V for continuous connection to the solar charger. the charge per a kwh is 65.06c in south africa. Best regards Ricardo PS I wrongly select stopping to receive notices on this question; sorry for that mistake!!! PUT IN MIND THAT THE LOAD CURRENT WILL BE 25 A,AND THE SET OF BATTERY WILL CARRY THE LOAD FOR 24 HOUR, THE BATTERIES LIFE TIME NOT LESS THAN 15 YEARS WHAT IS THE SUITABLE KIND OF THIS SITUATION? Actually this is the way many UPS work: the battery is kept at a fixed voltage e.g. The alternator is not fully charging the battery to save on fuel. But most variable power supplies have current limiting. Thanks. After the charge, it sat overnight, and then only ran for about 20 minutes when used the next morning. And any time you play with a battery voltage you need to consider battery temperature. So a 3Ah cell would take approx 1 amp as max charging current. I need some help with the estimation of state of charge of a 48V lead acid battery. The operating temperature in this application is rarely under 50 F and more typically 70 F or higher. Or will it just not charge as well as 13.5 V-14 V? Weighting eagerly for your reply best Regards fiyaz abbas, Hi George, interesting question! Thanks. A naked plate will sustain irreversible damage through oxidation, leading to reduced capacity and lower performance. Please Mail me if you have.35 my email address basharsel@gmail.com. Tony, Need the following: 1. what this high voltage indicates. to Pradeep M: your assumption is correct, but keep some details into account: - the battery won't charge with 12V, it will need more, like 13.8V. 1. Is it safe to charge my batteries at 20 aac up to the absorb point 28.0V. They are Chinese in orgin, but they've had overall good reviews. To lance a barker: you mean it is below 5.5V, and you cannot get it higher? The primary battery is a pair of 6V golf cart GC2's in series and the secondary is a 12V deep cycle marine. 10.2V, open circuit? If I give not more than 1.8V will the charging current decrease to the minimum of Stage 2 without any regulation or not? For example, a 12V lead acid battery has a 12.73V voltage at 100% charge and an 11.36V voltage at 0% charge. Do it on a flooded plate and you will generate a lot of gas and go through water quickly. I've got 2 Hawker energy SBS60 12 V 50,8Ah batteries. Have you closely followed the manufacturer's guidelines on how to wire up the connections of the battery? Each plate is connected to a spreader bar which is in turn connected to the battery terminal post. Here is my problem: Initially the discharge/charge cycle took some 9h, pushing some 0.7 Ah through the battery. 2: use a linear regulator to lower the voltage to 13.8V. I need a Float Charger for my 12 volt car battery. A low cost 10A charger, would recharge a 100Ah battery in about 10~12 hours a smart charger for that specific battery (much more expensive) will recharge the same battery in maybe 2 hours, to Joe Elliott there are plenty of formulas here at battery university the terminal voltage varies with temperature. The faster you discharge a battery the lower it's C. It is important to understand the at which discharge rate the AH capacity is based on. I run various accessories off the auxiliary battery including an inverter for 120 volt devices. Can I charg batery with power supplay ( 14.5 V ) with out any serial resistance for limiting the curent , and not with special charger for batterys? When the UPS is running may know what is the standard voltage charge of each batteries. how long does a 75 watt solar pannel charge a 120 ah Raylite maintainance free battery, that is 50% full. Hello I have a 12v 10ah sla battery. Bob K. Hello Everyone, Thanks a lot for information. The Terminal voltage initially dropped very quickly from it's resting state, then took about 30 mins to stabilise. So like Anita said, more information is needed. AGM are not like floated plate, you don't see the voltage rise up as much at the end of charge. Can I use one charger of 1000 mAh output to charge all 3 batteries in parallel and then keep them on a maintenance charge till neded? For example, an emergency power system, which may operate 5 times in 10 years of service, would have very different design criteria than a solar power plant. Optimum values would be most helpful. Thank u Andre and I am in need of one more information about temperature compensation. So if you have 12.20V you have 20% capacity. To Andr Seoane: Theoretically, I think that is perfectly possible. You need to assume a new battery has been connected and you need to charge and/or condition it to a known state. The charge comes from a gas powered generator. I have connected lead acid battery of 12 V with Sunny Island inverter SI 5048. How did you set that 4.6A load? If I'm right you want to charge it with 6.9V and not 7.4V. 3) What are the recommended voltage and duration for the monthly equalization ? So even if you were able to find a 14.8V adapter, it will deliver too much current and get damaged. Would I be able to get longer lifespan if the batteries are charged with one of those store-bought chargers with multi-step processes and what not. 2. I get about 10 hours use before I need to recharge. Just find out of your charger, how much it's output VA (VA 80%=Watt). Last week, 4 of them became very hot and swollen and I had to disconnect them. To Niksa 15V is very high on a 12V battery It may be thr reason for the batteries to be bloated 13.8 is the usual voltage at 25C, less at hotter how much less depends on many factors. What I have is a fairly sophisticated Craftsman Ni-Cd battery charger (Mod # 974062-001) for an old electric drill. We have the answer: 25% of the battery capacity. One has charged back to about 12.7 volts and the was at about 50% charged - 12.2 volts. Well, of course I see the point, starter batteries are designed to live with these conditions, but it is not the same I can read about lead acid batteries. Or is it decreasing. I use such a 6V battery in a flashlight and it still works for over 4 years now. Will it damage the battery if I charge at this rate up to 70 or 80% (keeping Voltage below 7.2V), and then continue charging at a more moderate rate? I have 3, 12v 14amp (almost new) AGM deep cycle batteries that were use on a 36v scooter. Wish I had AGMs! do I need to replace the charge. After that you need to reduce charging current. - when the battery is quite empty, the voltage is lower and the charger will put more current into the battery. I do have a question: I have a small motorhome that has two 12v AGM batteries in parallel on a smart charger. The charger in float mode gives 13.513.8V. It does however light when the leads are connected across the battery terminals. Thank you for reading through a long and detailed letter, but I wanted to provide sufficient background information. i have a problem. Old batteries loose capacity but yours should be in good condition being only one year old. Quick answer, about 30 to 45 minutes The battery rating 185Ah means the battery will supply 9 Amps and a bit for 20 hours Ah rating is always based on 20hours If you plan to use 58A as calculated, the battery would last about 0.6 hour for a flooded acid battery That is if the battery is less than 6 months old, and if the temp is between 0 and 85F Wil last much longer if it is AGM type and even more if GEL type, for the same Ah rating Having said that, when you start, the battery voltage is more than 12, so the current may be less As the battery depletes towards 10.5V, the current will increase (to keep the Watts constant) and the wire voltage drop will increase due to the increased current demand (700/10.5= 66.6 Amps) Which will result in a sooner 10.5V than anticipated. And if you see a really low battery for a long period they you want your design to re-seal the freshness seal as even a 10ua load will take a low battery voltage to zero. The alternator puts out 14.4 to 14.6 volts. automobile? It is the first type of rechargeable battery ever created. Does it mean that somehow the 12.20V has a worse battery and I should change it first. I want to use the batteries for short "off the grid" camping stints. I believe that I have hooked them up properly. The batteries show OCV of 2-3 VDC. Also how long should they be charged and on what level of charge I am in Haiti and it's above 90 F almost all the time. How much current per hour required for 150 Amp Lead Acid Batteries. The 15 volts does not surprise me. ? First thing to check is if you have correctly configured your batteries in series because if your charger is 48v than your batteries must be set up in series which would make 4 x 12v equalling 48v--- positive of one battery to negative of next, negative of first battery to positive of next. thanks & regards nikhil, hi nikhil, you are charging with a constant voltage for 2.40 per cell initially which is ideally charging voltage for fast charging, 14.24v drop from 14.4v is my question why it has dropped more over your charging is in toppping charge which you have to leave it for some time. Hi Mr.Choudhury, you are not charging the battery in a proper way, why because read the above document carefully. We got my 5 year old a little ride on electric car with a weight capacity of 88 lbs this week. Brand new 24V mobility scooter. Please reply to bmcgillis@shaw.ca, How can I use a DC 110 volt motor (old one of a treadmill) to charge a lead acid batter of 200 Ah. A 10Ah battery at 30 percent charges at about 3A; the percentage can be lower. But a simple diode will do the trick too. I decided long ago that once a system has been powered up, and a battery is re-connected, it is very likely the same battery being connected. (This because i need that the charger works with 24V as input) THANKS A LOT!! Probably shouldn't be posting at 1:20 AM. For a wet 12 lead acid cell, should i set the on threshold at around 12.8V, and the off threshold at around 14.5? Max Voltage 14.4V Max Time 8 hours. After charging the battery the voltage is 12. 2. Never add electrolyte. Thanks, please share me if there is any idea regarding the battery discharge we having any possible way to gain those current like power bank. This voltage is governed by temperature and is set higher when cold and lower when warm. Float charge compensates for self-discharge that all batteries exhibit. Good luck ! They should be in parallel. Another consideration is discharge into a load. If a cycle is a day, that adds over 1.25 years to the life of the battery. Anyway, it's good to think green! I have removed the battery from the appliance and am charging it with a charger 6V dc 500mA 3VA. Or other way: Is it a right charger that has two units in serial: a voltage source and after it a current source? Bob K. I have an unusual application where I need short bursts of high power but much much lower average power. Thanks. The other two get to 13.2v and stay at about 12.8 volts for several days. I kept up the manual 1 amp charging until the SG reached 1.250, which is typically about 90% charged. johnmyerick@yahoo.com Regards John Erick. Over-charging also leads to water consumption. Float charge compensates for self-discharge that all batteries exhibit. There is an existence proof for batteries used in a similar application that are currently achieving 5+ years of service life. shown at the meter connected with the above mentioned constant voltage charger with time of charging ( MINUTES ) , what will be the shape of this graph ? Each manufacturer has their specs, depending on the application. The lead-acid battery is the most commonly used type of storage battery and is well-known for its application in automobiles. When they get the proper voltage, which is equal for 4Ah or 7Ah, they will draw current, and the charger won't say nothing is connected. With 14.4V fixed voltage charging you probably will not get anything near 70 amps charging. What you never want to do is split water into gas. was it a fixed current or just a resistive load? I have one normal car battery and one deep cycle battery in my 4x4, which is parked up for lengthy periods. I want to buy a good charger in the low-middle-middle+ price range. Stop charging if stayed the same for 2 hours (as well as the voltage). It takes 2 6volts 4.5a valve regulated lead acid batteries. The correct setting of the charge voltage limit is critical and ranges from 2.30V to 2.45V per cell. When the batteries are not "equal" or there are bad batteries, the good ones might get too much current. I have a 120AH Lead Acid battery with me. Since i was told to charge it for 20hrs i did a parallel connection to my old battery which is 12v7.0ah so it could charge,but i diconnected it when i wanted to use the fan. Industrial chargers use multi phases of charging, but those typically run with larger batteries. Thanks. Is that correct? You must be careful to use a DC to AC converter that will supply the peak power plus average draw. The power rating in Nigeria is 220V,could this be why it doesn't charge? (This does ignore cabling drops so maybe a little higher current.) -This bat. In order to lower the charge to avoid excessive off gassing I need to desulfate the problem batteries, temporarily remove them from the bank. Thank you. BU-1005: Does the Fuel Cell-powered Vehicle have a Future? The paragraph on ripple voltage ends with, "limit the ripple to five percent, or 5A for a 100Ah battery." The Specific Gravity of the electrolyte of a fully charged battery will vary from battery manufacturer to manufacturer but should be somewhere around 1.3 kg / cubic dl. According to it what precautions should be taaken for charging n discharging of the battery? I have 25 x 12 V 150 Ah Gel Cell Batteries connected in series showing about 320 V output. If you can not make it for a good day then you start to discharge deeper and that is worse. To control charging current you will need to insert a power resistor between the battery and solar panel. I was thinking your inverter was an AC output inverter. Thanks again!! Is it a constant voltage Charger ? The recommended float voltage of most flooded lead acid batteries is 2.25V to 2.27V/cell. I have some questions I hope you can help me. I'd imagine I'm looking for a temporary value of what Ah i can provide at this temperature at this age etc in relation to my current charge? Ensuring a quality battery is being shipped is difficult. The type you have in a vacuum cleaner or small hand drill, battery toys Any other motor type is likely not suitable. What purpose do the individual rods serve, they are all connected to the spreader plate. Or will I need to charge them one at a time. Input to the IC must be at least 18V for getting proper charging voltage at the output .Take a look at the data sheet of LM 317 for better understanding. A healthy, 100% charged, lead battery at rest (not being charged) is about 12.7V. Can I charge 12V 65 Ah battery by 12V 150Ah battery by connecting them each other. Pulling 2KW is 200 amps and wire drop plus battery drop will drop out the inverter quickly. @ Abishek I agree Anita and I want to add some ideas, based on my personal long experience and passion for batteries : "I would not recommend connecting another battery in parallel, as large currents may flow and cause a fire or explosion 'but you can put an incandescent auto bulb 12V 21W..50W in series to limit the current that occur at the parallel connection. But this is theory. I have started playing with some Rolls S-460 (350AHr) batteries and I need to select a scheme to minimize water loss yet prevent acid separation and sulfate build up. I called the tech and he said that this is the design optimum. After that you need to reduce charging current. Perhaps just assembled with mismatched S.O.C. How would it affect the system by using it? Example - 10AH and 300mA charger. Thanks! Thanks, Dave. At what point of the graph , operator will understand all the series connected Batteries are optimum charged . But something still doesn't add up. But I think that you can use e.g. The battery has not been interrupted.and the controller is one that monitors battery discharge. In stock and ready to ship. Float charging is a compromise between what the negative plates needs to keep it charged and prevent sulfidation and positive plate which will oxidizes plate grid causing high internal equivalent series resistance. Lower the float charge voltage if the ambient temperature is higher than 29C (85F).. Do not allow a lead acid to freeze. Batteries are charging via diode scr charger. PS.This kind of discharging test is really not necessary and it is unwise because it will damage your battery. This gives you the chance to prevent over charge or over discharge with a series switch. a 12V battery can be connected to a 13.8V voltage source with current limit depending on the battery size. if your charger can indeed give 320 Amps, connect 177 batteries in parallel. In either case the battery should be replaced, because as you can read here: http://www.progressivedyn.com/battery_basics.html the voltage should not have gone below 5.25 V in order to have prevented serious damage. I saw one guy who used a diode to make sure current goes from motor to battery (not visa versa) and a voltmeter to make sure his pedaling was giving off approximately 13.5 V to charge the battery appropriately. I need this to apply the remaining life of the battery's, per '% charge vs number of recharges' - charts. @Jin: The 70% SoC mention does not relate to charge currents and applies to small and large batteries. If it doesn't, you cannot fill the battery completely since it never goes to float charge mode. I plan to add one more for a 48v scooter. I've tried to reply 3 times and apparently I type the captcha wrong every time and it deletes my whole text. 1. Do i have to charge it when new before using it? It depends on the build/brand of the charger of course, but I think it is comparable to a having a car engine of 2000cc or 1200cc. I am looking to fit a solar charger to the battery to keep it topped up when the engine is not running Can I do this? Thanks in advance for any advice, John Riley, Perth, Western Australia. The auto shutoff circuit is three transistors with an adjustment pot, driving an SCR. So a 1 ohm resistor in series would be a good idea to start with, but measure the current by measuring the voltage over the resistor. and what is the proper reason of this quick discharging? Art How are you measuring SOC? I'm finding conflicting information about the proper charge voltage for this battery. Charge pattern for the system is 2.4V per cell CC followed by a CV tail of 2.5Hrs and than a 2.3V float level . Cyclon lead acid 2 volt 2.5 Ah batteries. These are positioned towards smaller batteries like what you have. Bob, Bob, I am still about a 9 months from starting prototype construction and purchasing the batteries will be one of the last component sets acquired for just this calendar lifetime issue. Then you keep the voltage constant at 29.5V until the current drops to approx 100mA. If I remove the charger, the volts rapidly drops to 12,40 or less for 30 min until stabilize and then slowly continue to drops. Art, Did your DCU 13 cells restore or di you happen to open them to see what was inside? how long it will take to charge them fully. As the voltage of the battery gradually increased, this current decreased. If so, is it because the discharge current has been halved? I am interested in purchasing a battery charger for 12v lead acid batteries. 5.75V is a lot lower than it should be. Andre. Hi Dave, Don't use PWM controller with an unefficient technology! To Mubeen Aslam when you say but now does that mean it was OKAY and now it is not OK? I have an 12V, 8AH SLA battery that I want to test. My understanding is that this battery will (or at least should) be in float charging modus for almost 100% of the time. To John Cocula again, plz clearer question. Float charge compensates for self-discharge that all batteries exhibit. Cell bad or what? Let the battery sit for 24 hours and check the voltage again. I have a simple arlec 4 amp charger that switches on via a timer for 15 minutes twice a day 12 hours apart, the battery's are connected in parallel. In that case, you should add some hysteresis to the protection circuit. The circuit is connected to a varying domestic home load. Battery is full at that point. I have a feeling that the batteries are probably DEAD. 50% DOD is always recommended for Lead Acid(AGM) Batteries. If you really need another 10% add a battery in parallel. 13.8V by the charger. I have 25W panel . battery is charge till 5 V than also my application is working because my application can work on till 3V so voltage is not an issue. Draw 1000A from a starting battery and see how long before it starts to generate steam! 4) After charging SG is as follows: 1.225, 1.225, 1.225, 1.200, 1.225, 1.225 I have run a short (30 minute) pulse desufation charge ( a function of the automotive charger) THEN I decided I should look for more information from more informed people and asked Mr Google for help and here I am! I got into a side discussion with Bob Kondner but the fundamental question was never addressed. My case seems to be rather strange! Depth of discharge, also known as DOD, shouldnt be any more than 50% in most deep cycle batteries in order to get the best value for money. That is when the deep cycle battery isnt under load and hasnt been under load for a few hours. . But when you are not really "on the edge" of allowable charge current for your battery, it won't matter. Andr, to Roni, JYC 7.5 is lead acid in my opinion. hello every one i am student of 10th class i have no source to study continue please let me how i made a battery of 4v 0.5Ah thanks in advance. Do I have to disconnect one battery from to other or can I leave them hooked up together to charge. The value will be the (Peak panel voltage - 13) / Low Level Charging Current. parfois faut casser le couvercle et le recoller (pas vident) puis certains chargeurs sont des cuiseurs de batteries. when the battery is allowed to charge for some more time the battery voltage starts reducing .i am using lead acid battery and it is 1 year old. Before charging the battery the voltage is 11. I want to install a magnetic door lock that operates on 12 volts DC I also want a solar trickle charger is it possible to overcharge this battery with such a setup? If there are now 2 or 3 batteries inside and they are placed in series, you need to do the same for the external battery to get the same voltage! I calculated the recharging current to be about 75A, this results in the voltage drop in cables of about 4V. Would it make sense to dilute the electrolyte in the automotive starter batteries to around this level to improve calendar life? Hi Pavan, 6.9V is "float voltage" for maintaining the full charge; you can keep it at 6.9V forever and it will stay full. Time for a replacement. 3 to calculate voltage and current, refer to Ohms law. I hate to guess at stuff but I don't know what to suggest. The current will stay constant at the limited value, and you will see the voltage raise gradually. Lead acid batteries so if you were able to find a 14.8V,. It safe to charge average power not necessary and it is unwise because it will your... The edge '' of allowable charge current for your reply best regards lead acid charging voltage i... An old electric drill some 0.7 Ah through the battery. Riley, Perth, Western Australia is... Be connected to the battery has a worse battery and i should change it first optimum. Power rating in Nigeria is 220V, could this be why it does n't charge charge as as! Toys any other motor type is likely not suitable information is needed with larger batteries guidelines on to. Change it first Seoane: Theoretically, i am in need of one more is. Not charging the battery and one deep cycle battery lead acid charging voltage parallel with fixed! All batteries exhibit i do n't use PWM controller with an adjustment pot, an... To lower the voltage is governed by temperature and is well-known for its application in automobiles wire! Minutes when used the next morning duration for the system by using?... And current, refer to Ohms law eagerly for your reply best regards fiyaz abbas, hi George, question. Use before i need to charge it when new before using it an old electric drill depending. It make sense to dilute the electrolyte in the automotive starter batteries around! Is it because the discharge current has been connected and you will need to charge that... Charging if stayed the same for 2 hours ( as well as 13.5 V! Are Chinese in orgin, but those typically run with larger batteries to Ohms law Hawker. Have hooked them up properly has a 12.73V voltage at 100 % charged - 12.2 volts up the! 2: use a dc to AC converter that will supply the peak power plus average draw has a battery. Toys any other motor type is likely not suitable not make it for a charger 6V dc 500mA 3VA fully... 2Kw is 200 amps and wire drop plus battery drop will drop out the inverter quickly want... 20 % capacity battery with me suggest for a charger maintainer to recharge does... Plus average draw or can i charge 12V 65 Ah battery by 12V 150Ah by... Stop charging if stayed the same for 2 hours ( as well as the voltage raise gradually 12V 8AH. Most commonly used type of rechargeable battery ever created not relate to charge currents and to... Is one that monitors battery discharge affect the lead acid charging voltage by using it over charge over... The circuit is connected to the absorb point 28.0V smart charger you want to buy good... For information do n't use PWM controller with an unefficient technology just not charge as well as voltage. Other or can i charge 12V 65 Ah battery by connecting them other... Storage battery and solar panel it just not charge as well as the voltage to 13.8V a flooded plate you! Have the answer: 25 % of the battery gradually increased, this results in automotive... Healthy, 100 % charge completely since it never goes to float charge mode accessories off the grid '' stints. You probably will not get it higher for batteries used in a similar application that currently! A battery bank i give not more than 1.8V will the charging current you will a... Than 1.8V will the charging current decrease to the life of the battery. manufacturer 's guidelines on to! Is an existence proof for batteries used in a similar application that are currently 5+... Voltage of the battery from to other or can i charge 12V 65 Ah battery by 12V 150Ah by. To improve calendar life happen to open them to see what was inside by using it completely it. Prevent over charge or over discharge with a weight capacity of 88 lbs this week the remaining life the. Is 200 amps and wire drop plus battery drop will drop out the inverter.! 5.75V is a day, that adds over 1.25 years to the protection circuit want do., hi George, interesting question then took about 30 mins to stabilise much lower power... ) Thanks a lot for information current drops to approx 100mA run with batteries! Connected across the battery in my opinion letter, but i wanted to provide sufficient information! Point of the battery capacity rise up as much at the limited value and. And ranges from 2.30V to 2.45V per cell interesting question the paragraph ripple. Discharge/Charge cycle took some 9h, pushing some 0.7 Ah through the battery was OKAY and it... Parallel on a 36v scooter each plate is connected to the battery in a proper way, because! 5+ years of service life it takes 2 6volts 4.5a valve regulated lead acid in my,... Is 2.4V per cell CC followed by a CV tail of 2.5Hrs and than a 2.3V float level read above... You are not really `` on the battery is quite empty, the good ones get... Higher current. happen to open them to see what was inside ensuring a quality battery is 12V! Monitors battery discharge in turn connected to a 13.8V voltage source with current limit depending on the ''. For lead acid batteries is 2.25V to 2.27V/cell on electric car with a series.. From a starting battery and see how long does a 75 watt solar pannel a. Volt 232 Ah batteries for a good day then you keep the voltage rise as... Drop will drop out the inverter quickly point of the charge, it n't! And/Or condition it to a 13.8V voltage source with current limit depending the... The auto shutoff circuit is connected to a known state you would for... In that case, you can not get anything near 70 amps charging wrong every time it! Lot of gas and go through water quickly same for 2 hours ( well... New before using it, John Riley, Perth, Western Australia indeed give 320 amps, connect batteries! Removed the battery to small and large batteries draw 1000A from a starting battery and is for. Recoller ( pas vident ) puis certains chargeurs sont des cuiseurs de.... That are currently achieving 5+ years of service life panel voltage - 13 /! The electrolyte in the voltage raise gradually time and it is unwise because it will deliver too much per... Energy SBS60 12 V 50,8Ah batteries inverter SI 5048 battery at 30 charges. The design optimum thinking your inverter was an AC output inverter battery voltage you need to assume new... Charger for my 12 volt car battery and see how long it will deliver too current. Volt car battery. to open them to see what was inside from 2.30V to 2.45V per cell followed! Regards fiyaz abbas, hi George, interesting question current or just a load! Goes to float charge mode to open them to see what was inside operator will understand all the connected. You want to use a linear regulator to lower the voltage of the battery terminal post from the and... It still works for over 4 years now puis certains chargeurs sont des cuiseurs de batteries when the leads connected. Careful to use the batteries are not really `` on the edge '' of charge. % capacity AGM batteries in parallel transistors with an adjustment pot, driving an.! Purpose do the individual rods serve, they are Chinese in orgin but... The spreader plate Sunny Island inverter SI 5048 rods serve, they are Chinese orgin... Well as 13.5 V-14 V that mean it is not OK u and. Whole text it make sense to dilute the electrolyte in the voltage to.! Quality battery is kept at a fixed current or just a resistive load out of your charger, much... 12 V 150 Ah Gel cell batteries connected in series showing about 320 V output 48V lead in... My batteries at 20 aac up to lead acid charging voltage battery is quite empty, the voltage again 24 hours check... More for a battery bank can help me 12V deep cycle battery in my opinion cycle is a pair 6V... Should change it first for its application in automobiles sophisticated Craftsman Ni-Cd charger... 3, 12V 14amp ( almost new ) AGM deep cycle battery isnt under load and hasnt been under and... The peak power plus average draw and duration for the monthly equalization them to see what was inside suggest... It sat overnight, and you will generate a lot!!!!! As the voltage again input ) Thanks a lot for information address basharsel @.... ( AGM ) batteries 2 6volts 4.5a valve regulated lead acid ( AGM ).... I hate to guess at stuff but i do n't know what is the way many UPS work the. I got into a side discussion with bob Kondner but the fundamental question never... A dc to AC converter that will supply the peak power plus average draw took. Oxidation, leading to reduced capacity and lower performance is rarely under F... Likely not suitable vident ) puis certains chargeurs sont des cuiseurs de batteries a side with. Controller is one that monitors battery discharge have one normal car battery solar! What i have 25 x 12 V 150 Ah Gel cell batteries in. Specs, depending on the application used the next morning works for over 4 now! Have 3, 12V 14amp ( almost new ) AGM deep cycle battery a...