12v battery voltage charge,auto battery north vancouver,truck battery price in india diesel - PDF 2016

26.09.2015
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Your bid is the same as or more than the Buy It Now price.You can save time and money by buying it now. By clicking 1 Click Bid, you commit to buy this item from the seller if you're the winning bidder. I put together the following chart which indicates the state-of-charge (percent) as it relates to battery voltage or specific gravity. How I determined the voltage values: I researched as many battery manufacturers that I could find regarding their own published SOC data.
Note: Voltage measurements are only approximate to determine SOC, and measuring battery voltage is NOT the most accurate way to do this (there are variables under varying circumstances).
Note: For longer battery life, batteries should remain in the green zone (40% or more SOC). Note: The 100% voltage is NOT the recommended charging voltage (which will be higher, and multi-stage). If the gravity of each cell stays relatively the same (usually all in the green) does that mean that I don’t need to equalize that battery? The reason I ask is: I have 90 watts of harbor freight panels, run thru a sunsaver controller that charges 2 wally world deep cycle batteries and the gravity has almost never been below the green level, and I never really have had to add much water.
My other set up has about 750 watts of poly panels, run through a xantrex 30 amp charge controller charging a trojan 12 volt golf cart battery.
I guess my question is do I need to do this since the wally world batteries always seem to be in good shape as per hydrometer readings? I built an off-grid system for my home and have expanded and maintained it myself over the years, so that is my knowledge base.
Also, NEVER combine different types, or age, or widely differing state of charge of your batteries when charging. Thanks Carl, and as you insinuated, there are variables, including temperature compensation measurements and others. Saw this as I was looking for a SG to SOC chart and thought I would make a couple of comments.
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Caravan advice, reviews, reports and diaries from some of the most knowledgeable people in the industry. To maximise the life of the battery, it is advised you never let the charge drop below 50%. Leisure batteries with a voltage of below 11.81 should only be charged with a 4 stage charger otherwise damage to the plates may occur.
For the most accurate results using this method of measuring the state of charge (SOC) the battery should have been rested for at least 6 hours - i.e not been charged or any load put on it. Do I need a "main battery" switch to turn the batteries off - between the battery and the fuse unit???
I'll be able to take a better look at this later, but pretty much you first need to get a good number on your daily power needs.
Now for the battery selection, one thing to keep in mind is you don't want to bring the battery below 50% capacity too many times. Now with solar, you can offset the batteries from reaching the 50% mark and in some cases (depending on how much solar you will have), you can even sustain your batteries at 100% each day. I read somewhere that you generally want to shoot for making all of the solar power you want in just a 4-hour window. Your use of this website constitutes acknowledgement and acceptance of our Terms & Conditions. Contact the seller- opens in a new window or tab and request a shipping method to your location. You have read and agree to the Global Shipping Program terms and conditions - opens in a new window or tab. Import charges previously quoted are subject to change if you increase you maximum bid amount. Voltages and Specific Gravity are listed for a 6-volt or 12-volt battery, and battery banks of 24 and 48 volts. Some were slightly different from each-other with regards to their SOC values, however I averaged all of them together to come up with a chart which represents what I believe to be a good general indication. A more accurate method is to measure the specific gravity of each cell within the battery, however for many batteries this is difficult or impossible (AGM batteries, for example). Occasional dips into the yellow may not be harmful, but continual discharges to those levels will shorten battery life considerably. Just thought it might be helpful to add that one tool I’ve found useful is the little floating balls thing for checking individual cell status in lead acid batteries. I mainly use this system for 12 volt water pumps,a few LED’s and cfl lights and occasionally power tools.
My immediate thought about the differences in your two battery banks is that the wally world batteries are newer, or less heavily used than the Trojan.
I do off grid solar for a living, 25 years now and I sent a customer the link to this chart to give him an extra tool to keep tabs of his system. Share advice with our members and keep up with the latest caravanning developments on the forums. These are not expensive and small simple multimeters can usually be found for around £10 in electronic shops or big DIY stores. With the caravan 12 volt electrical system turned off, place the red lead on the positive terminal (+ve) and the black lead on the negative terminal (-ve). For the best charging performance when the leisure battery is not in use (over winter) look for a charger that offers a 4 stage charging process ( Bulk - Absorption - Equalisation - Float).
Anderson plugs - not sure how these wire up - but assume they go from the alternator on the tow vehicle - but do they go to a charger of some sort that is then hooked to the battery?
If you have a battery that's rated at 100Ah, then this could be said as you normally don't want to take it below 50Ah.


This has helped me really start to understand the battery state just from looking at the voltage reading.
If you reside in an EU member state besides UK, import VAT on this purchase is not recoverable. Measuring and knowing the SOC of a battery or battery bank is useful when applying towards alternative energy, or any other situation where you need to know its condition. Many (most) alt-energy systems incorporate a DC-shunt which keeps track of SOC by monitoring the current flow in and out of the battery or battery bank, which is a very accurate way to track state-of-charge. To be somewhat accurate, the battery should be in that condition for an hour or two before taking a measurement, while for a more accurate measurement you should wait 6 hours up to 24 hours. Generally speaking, the less you discharge the battery before recharge, the longer the battery will last.
The Trojan sounds like it is getting old, and needs more frequent watering and equalizing to keep it functioning.
The one thing I would disagree with somewhat from your well written article is concerning the accuracy of state of charge meters. If you actually end up using on average 80Ah per day and you want to fully sustain that by replenishing it each day, you'll want around 250 Watts worth of solar power to guarantee you get all of your power back the next day.
Most alternative-energy systems are designed to keep the battery bank at least 50% or higher. When batteries are in series they do not necessarily charge at the same rate and can become imbalanced.
This should be your minimum, bottom dollar, don't get less than Ah rating for your battery(s). It is set to equalize every 30 days, however sometimes I have to do it more than that, to bring them all back to green. The plates may have become heavily sulfated enough that the equalize mode can’t get it all off into solution. The equalizing charge ups the charging voltages in order to get enough voltage to the lesser charged batteries in the series chain.
I combine the batteries whenever we lose power for more than a few hours so we can run TVs, fans DVD player and lights etc.
The standard meter for years has been the Tri-Metric meter but I finally gave up on using them because they arent very accurate unless fine-tuned beyond the level most homeowners are capable of understanding. Yes it will over charge the higher charged batteries, which is why the equalizing charge is only applied for a short time, however if the system uses a single battery equalization is not required and can be detrimental. You should probably start saving your shekels for a new battery because that one is not going to live much longer. It doesnt help that the manual makes little sense to the layman or that the meter cant read battery voltage and often keeps compounding small errors into bigger ones.
It would be wise to buy a desulfator unit for your batteries in order to reverse sulfation of the plates after long periods of less than 100% charge. The meters that you can get that take their info from the inverter or in the case of Midnite Solar from the charge controller are more accurate because they temperature compensate but they need fine-tuning as well.
Just yesterday a customer called because his inverter shut down at 23 volts, a definite low battery but the SOC meter claimed he was at 81% full. I sent him a link to your chart and told him to call Magnum tech support to learn to tweak the meter.



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Comments 12v battery voltage charge

  1. iko_Silent_Life
    Packs charging - that is akin to watching the grass grow most are unaware of the features,benefits.
  2. EYNAR
    Speaking, NiMH is the best able to recharge the battery depends sure which type of battery.
  3. SS
    That bears an electric purchase your new car battery and repair.