As it is dual voltage are you sure it hasn’t been set on 24v? I have a car battery that i put on my trickle charger until it reaches 100% 12.6v. Batteries will eventually die, but when and how? I have searched quite a few sites, but can’t come up with a conclusive answer. (sorry for bad english). pls can I refill it with distilled water or with the acid water. Is there a test kit for the proper electrolyte to water mixture ? If the specific gravity is only low in one cell, that indicates an internal fault, in which case charging the battery may actually be dangerous. Initially it delivers in 400W test for more than 3hrs . 99. There are already a number of high risk elements in this development and a complicated battery system does not serve the goal of demonstrating the value of the fundamental approach over current IC engine driven winches. Satay, I assume you have a 12v system with the one 12v battery? BU-409a: Why do Old Li-ion Batteries Take Long to Charge? So there you are- if you can,t work it out from all the info on this site- we give up!. Also the car has had problems to start in the morning with the voltages specified above. Gases are often compared with dry air, having a density of 1.29 grams per liter (1.29 ounces per cubic foot) under standard conditions. sir Is this of concern, and if so what can I do. You are in the best position to check. A fully charged battery will have a concentration of sulfuric acid to water of 1.280, while a discharged battery will test out at about 1.145. Track the current flow in and out of the battery with a ‘shunt’ and associated metering circuit (common with alt-energy systems). IS HE TELLING ME THE TRUTH? If you really need to replace the acid / electrolyte it has to be properly adjusted. These batteries are the original batteries, they have lasted about 12 years. One of these is not correct. I spill the old one, and put the new one. John that is disappointing. But the longest lasting start batts are neither over charged nor under charged- quality of make is a big factor.SLA type batts for starter use have far lower self discharge. They gave me a water with Sulphuric Acid(37%) solution. The batteries are sealed. It is indeed very weird, the battery shows signs of both over- and undercharge. to Tina 21 hours) to suppress acid stratification. Phone Number:510-335-3549 If no balls float in any cell, the cell is shorted. If the voltage is less than 12.4 volts (for a 12 volt battery) or 24.8 volts (for a 24 volt battery), which is typically 75% of charge, the battery may be too heavily sulfated to be fully recoverable. The unequal charge across the plates reduces CCA (cold cranking amps), and starting the engine is sluggish. It is okay if they vary by a bit. Seems like a shame but even being new they obviously were not stored properly… Thanks! Thanx a lot, John. At first I was just waiting until the voltage on the system dropped to 80%. Copyright 2021 VDC Electronics. Thanks Dalton, Sounds as if you have(had?) When we tilted the batery did we homogeneize the acid in the battery? charge rate is too high. Don.. Dear Sir, tonykid - I suggest you do the same thing. Shekhar - A battery in the situation you describe, with an SG of 1.150, is for all intents and purposes fully discharged and needs to be charged. In the summer my sg is 13+. Should I claim for its replacement? It charges during the next day. My recommended charge termination potential is 2.55V. then the batteries may be stratified. (Harmful.) Failure to do so will give you false readings indicating a battery that may not be in as good a condition as you may have thought. But unless you have spent many many hours researching and setting up your charging system, do not expect anything but failure. The batteries are not holding their charge. (g) When battery voltage drops to about 1.7 or less per cell when lamps are turned on, or lamps become very dim when the starting motor is cranking the engine, or the high rate discharge test shows that there is trouble in the cells. Check and record voltage level(s). WHEN THE BATTERY IN MY 2006 MIATA WENT DEAD, I DISCOVERED IT WAS And it was 1,28 again. of a fully charged industrial battery, or traction battery, is generally 1.285, depending on the manufacturer and type.Some manufacturers use specific gravities as high as 1.320 in an attempt to gain additional Ah capacity, but at the cost of a shorter cycle life. Take specific gravity readings every hour. Hi The deeper the discharge, the shorter the battery life will be. the fact that the batteries are sealed, does not mean they do not need maintenance But the agm I used before it measures 13v after full charge and left for 1week. Learning the basics about batteries - sponsored by Cadex Electronics Inc. © 2021 Isidor Buchmann. The application is a battery-electric winch for use in launching sailplanes (gliders, not hang gliders). Satya: Your battery is most likely overcharged and often boiling. This creates only on chemical reversal per 24 hours instead of two. 1)The specific gravity of the electrolyte in the battery will increase when the battery is charged more. I read this article about acid concentration so I tipped the battery onto one side then the other over and over for about 2 minutes then attached the charge leads and it is now charging correctly. Any value that falls within this range will indicate that the battery is holding a good charge. — the famous rotten egg sulfur aroma has come calling. I just purchased a neglected sailboat that has been converted to electric propulsion. check that the electrolyte level is above the plates (that the plates were not exposed to air) The gassing will eventually slow down after some more deep cycling and the antimony will end up buried inside the negative active material. Anita - Excellent advice. few days ago I drove the car going well after some miles suddenly stopped. 3.1 out of 5 stars 7. I read the voltage, and for my surprise was 12.60 volts, after only 5-10 minutes of charge. That is, the plastic parts cannot be closed (glued back together) one solution is to drill holes in the top cover. and after it work fine. My generator shuts off when V is 28.8 for 10 min. The most accurate and direct way to test the state of charge of a battery cell is to determine the specific gravity of the battery electrolyte. Specific Gravity: Full charge SG will run from about 1.260 in an auto battery to about 1.275 in a golf cart. You might find from observation a lower voltage will work but 2.25V is too low. Can this be done with a simple parallel wire hookup (using 6 ga. stranded wire)? Additionally, excessive watering of a battery can result in additional dilution of the electrolyte, resulting in reduced battery performance. What is really useful is an impedance tester for batts- they are expensive to buy, but can be made cheaply. My ups charges the battery @ of 30A12v. There may be dust in an ac that is used intermittently, which could be a problem, and algae in one that is used all the time. There was terrible sulfation on the parts of the battery above the water line and I was sure I was stuffed. I have 2 string of 4 batteries each but I notice one of the string 3 batteries are bringing out water from the top what do I do ,but my Inverter is no longer working well enough kindly suggest how to correct the battery strength to avoid damage. Your battery manufacturer may provide more specific temperature adjustments, possibly including basic to somewhat complex mathematical formulas. Automobile, small/large truck, bus, train batteries, some have a good deal of life for UPS type application. can a pluser make prolonged the lead acid battery life,and avoid sulfation. Long established sulfate will require a longer period to be fully dissolved. So I repeatedly filling distilled water on 4/5 days interval. BU-802a: How does Rising Internal Resistance affect Performance? 6. It came in much lower than expected, at 1.002 (it should be around 1.010). He told that he would fox the problem. We started the car with the help of another battery but when it is on, the lighs inside blink, and the voltage is not stable. The strangest thing is that when I measured SG of new electrolyte in battery, it was lower than before. Always fill to the correct level after charge. Any info on test kits or fixing this self induced problem is greatly appreciated. These are inexpensive and can be purchased at most automotive parts stores. I check the electrolyte and one is really low and the other is over flowing. Thank you, A newly purchased UPS 200AH lead acid battery is found to have weak electrolyte ie 1220 instead of 1250. Hi! This CS Etrek is supposed to run AC , fridge and microwave(when needed) for 9 hrs. Disconnect charge controller and main amp battery breaker. The gravities should be 1.265 ± 0.005 or lower. That is along the lines I was considering. Another interesting thing is that, for people having vast array of batteries to manage, sometimes there is a non corrodable form of float and piping system used to automatically top up. The battery is old and nearing end life. Bought some used sealed lead acid batteries of 12V 7aH. Latex gloves work, but only for a few minutes. DMM reads 12.53 Volts. This spring I checked the water levels and put it on the charger, and it seemed to be charging properly, but the next day the error light on the charger was on. Here is a quick look at you how to use a battery hydrometer for 6 volt deep cycle golf cart battery. Even the best batts have a certain service life-ie no of charge-discharge, depth of discharge, sitting discharged- etc-etc-etc-all covered on this site. All I have read is that I should keep it up. Tom - The smell is most likely from stibine, a gas that is given off by golf-cart and forklift batteries when they are excessively overcharged. can there be too much electrolyte in the batteries and can this be remedied.. to Michael Campbell The biggest trick is removing batt from vehicle after every run & fully charging it( the average vehicle never fully charges a batt- or in the case of taxis eg, overcharges batt- leading to short life in both cases.) Unfortunately the battery goes dry up about 80% and battery doesn’t backup farther. Any chance of getting the s.g. back to 1.265? The sg is highest when batt fully charged-ie all acid is in the electrolyte solution. Refill each cell with distilled water only to the liquid level indicator found in each cell. BU-304: Why are Protection Circuits Needed? If voltage is 12.4 volts (for a 12 volt battery) or 24.8 volts (for a 24 volt battery) … Plain water is the baseline for measurement and has a gravity of 1.000. With regards. Sir I have bought 4 deep cycles batteries for my car but as my car goes on a dump,the batteries are shaking and water is moving up and down. Otherwise, the batteries are being very shallow cycled. anything wrong with leaving the cells completely open, and add a hose system with a big reservoir, keeping them full at all time? FREE Shipping. some one told me complete water take out from battery and again fill with electrical water I do and complete again refill with electrical water . Yes Phil. You have not provided information about the time or current when the UPS starts again. If any specific gravity reading still registers lower than the factory specification of 1.277+/-.007 then one or more of the following conditions may exist: The battery is old and approaching the end of its life. If the voltage is less than 12.4 volts (for a 12 volt battery) or 24.8 volts (for a 24 volt battery), which is typically 75% of charge,  the battery may be too heavily sulfated to be fully recoverable. In the summer my sg is 13+. It can last about twice as long as AGM. If low, could be sulfation, or you have lost acid by overfilling- spilling electrolyte. Some may consider this the ultimate way to go when the original gravity is too low. BU-1005: Does the Fuel Cell-powered Vehicle have a Future? Specific gravity is the ratio of the density of the liquid being tested to the density of water. provide the relevent solution for this problem. What might be the cause of this boiling? (ain’t free- like ac power seemed to be!). I have a 4890 watt PV system. After using the car for a while, and measuring the battery voltage in rest, the reading highest was 12,20 volts. Now, these are scrap batteries I am talking about It’s quite confusing as it can’t be sulphated as indicated by hydrometer and the fact that in normal use they are never taken below 80% charged. Unfortunately, RAPS once installed are usually ignored till trouble arises! HE TELLS ME MY Large luxury cars are especially prone to acid stratification. No one played with any other systems like we do today, it was simple. Thanks. As I believe is stated elsewhere on the Battery University website, lead-acid is still the lowest cost per kW energy storage solution. I added some distilled water before the odor became really obvious. There are even commercial products that do the same thing-ie, insulate the terms/conn from the SO2 corrosion. Five of them are over 3 years old, the sixth one was replaced this year. I have four six volt batteries in series in my1995 RV purchased summer of 2012. If you can, use intervals of two weeks. Use a temperature compensated hydrometer tester for the most accurate results (see table). My main concern is that my batteries can get back to a good SG reading of 1.265. I took the battery out and put it on a charger but the charger’s “charge” light was dim and then went out after a few minutes. Specific gravity can be measured using a hydrometer. The wet cell battery is a duo cell battery. The only time you add acid to the battery is if it was spilled out. Uspower Tech Measure battery's voltage, without any load attached. When new, a deep-cycle battery may have a capacity of 70 percent or less. My bike battery is dead. I can’t afford any expense in these because I am a single handed lady who look after the two families all the depended member so please do some thing for us. 1. I have a question regarding batteries on a isuzu truck after I start car I was happy car start but after 5 minute again stopped. I put together the following battery state of charge chart which indicates the state-of-charge (percent) as it relates to battery voltage or specific gravity. I have 8 6v US 125xc batteries. It is used to make the plates more durable. Kindest Regards Take specific gravity readings again. Now you need to multiply those 35 points by the pre-boil volume in your kettle. Take specific gravity readings again. Batteries in real life tend to deviate from this ideal for many reasons. What effect will it have on its overall performance and ultimate life. Advanced Search | 3. PLEASE REPLY.. To AAnya distilled water is mixed up with little percent of oil does it damages the battery? Also in my excitement to get into solar I added too many batteries for the solar array to charge, especially iunder 5 feet of snow and two eeeks of cloud in a row. If not, then is replacement suggested? I added too much water to a lead acid battery and it performs poorly now. the battery is just 2 yrs old. But I doubt if my battery would work properly. Should i remove complete water from it and filled with new distilled water ?? Fully charge batt- don,t overcharge. Bevan Paynter, thanks mate for the fridge water tip, i guess its got fewer dissolved salts than tap water will give it a try. Low performers are known to have a short life. This method will not use much water. I may have been gotcha’d…but has anyone tried this remedy with any positive results. John - If you say you recharged in a sense, it suggests you did not do a proper recharge. Now the bettary is easyly down and no strong power / so I want to refill acid/ distilled water but I do not know which kinds of things should i fill. Repeat the specific gravity test for each cell of the battery. Is it o.k to use the water from an ac unit to fill the battery? If the battery bounces back to less than 75 percent state-of-charge (1.225 specific gravity or 12.45 VDC), then recharge the battery and load test again. The battery is old and approaching the end of its life. Stibine is a compound of hydrogen and antimony. HUP battery bank. The battery system is composed of 36 high Ah automotive starter batteries. I see no indication that they are starter batteries as you state they are ‘deep cycle’ this may mean leisure batteries in which case you need to avoid taking below 50% and prfereably 75% to get a decent cycle life out of them. Would that push out your recommended interval. The water keel never went below the plates. Of course distilled water shall freeze at water freezing point and will only flow into pipes when melted. In many applications, the winch would only be used weekends and it would be stored during the week. Batteries do not give off sulfur. Should it only get 4 hours or less when not plugged in? The higher the acid concentration in the electrolyte, the higher the specific gravity. Is there some technical basis for the chemical mix you describe? The other thing all else being well is vibration or freezing temps, or even lightning strike!. The capacity of a storage battery is measured in. some newer batteries are such that I have to drill holes in the cover! Open circuit voltage of the battery was 12.20V. Failure to do so will cause false readings. See the Specific Gravity - Capacity chart below for more information. Voltage level indicates 53.3v for the DC buss. If it is not between these limits adjust it by drawing off some of the electrolyte with the hydrometer and replacing with water if the specific gravity is too high, or with electrolyte of the same specific gravity used in filling the battery, if the specific gravity is too low. To water, lift the container, unscrew the cap to let in the air, wait a few minutes, screw down the cap, bring the container down to just below the filler caps. Some batteries may appear bone dry, but they are not! I was under the impression that the deep cycle marine batteries would last longer. I’m thinking of braking the top of the battery just to add water. 14. Caused by parts per billion of stibine. To determine if the battery in a system is experiencing a problem, disconnect all electrical loads, fully charge the batteries then disconnect all charging sources. How can I tell what the problem is? I purchased a lead acid tubular battery 150 ah for my domestic UPS (900 VA). I let it charge for a couple hours at about 1 amp current until the charger said it was full, i checked the voltage and it was 12.6 steady so i waited for 2hrs, it still said it was 12.6. The monitoring process has been identified and corrected. without knowing exactly your system, one can only speculate Allow each battery in the system to stand on open-circuit for about one hour. This acid stratification thing is only a factor in flooded batts that are always stationary. Which is the right procedure,add water to acid or acid to water in a lead acid cells? If each cell floats three (3) or more balls (or 1250 on gauge-type), your battery can be reconditioned-desulfated. If any specific gravity reading still registers lower than the factory specification of 1.277 ± .007 then one or more of the following conditions may exist: 1. But first, a few important notes and caveats… amperes. I tried refilling one (12v, 3ah) with filtered and boiled water, but it did nothing. Put on eye protection and rubber gloves. Then ups again starts charging the battery without any usage. Excellent information! So now should i fill my battery with distilled water or sulfuric acid electrolyte solution?? Really- seems as if this application has not been really thought out!(IMHO). Check and record voltage level(s). In the case of battery testing, the hydrometer is measuring the specific gravity of the battery’s electrolyte. Batts are the big downfall in any alternative energy system- you all have to get used to economising on energy use! Put battery(s) on a complete charge. The other cells are okay, just one cell is10% below the minimum level on the battery (I can’t rememember if it was one of the ‘dry’ cells when I removed the battery from my motorcycle). If any cell shows a specific gravity more than 0.05 less than the others, the cell is dead and the battery will have to be replaced. Overcharging leads to (mostly) drying out the water from electrolyte thus decreasing its capacity and life expectancy dramatically. I installed 6 12 volt deep cycle batteries last year. Eventually, the dealer has changed the battery. I install solar inverter system in Nigeria, I want to ask how many liters of acid water is in 220Ah/12V tubular battery? I requested a Battery charge and a clean of the battery cable terminals. It’s likely that you have a bad battery that needs replacement. The excess capacity in the batteries (36 72 Ah 12V starter batteries would hold be about 30 kWh) can be used to buffer the generator during peak launch periods after which the generator could catch back up. please kindly tell me what should i fill in bettary. Avoid extending the topping charge beyond its recommended time. Other strange thing is that 2 cells had little lower SG than others. I got battery acid from autozone and refilled them and the readings were around 12.1v total. What would be the cause of the new gassing levels? When idle is 14,4V, but 2 weeks ago when I measured, it was 15,5V~16V with throttle.