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22.12.2014
If the circuit is powered off, the battery should be disconnected from it's output otherwise the circuit will drain the battery slowly.
I can guarantee that near zero volts the Q1 was dying anyway and left again at the next half-wave, of course, if the circuit demanded it. Sometimes I used a Tr NPN instead of Q2, but I never used Zener diodes, resistors only calculated appropriately. A defect and a merit of the circuit: while the charge current is reduced, the components are heated and increases their conduction thereby reducing the V Gate (or VBE).
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All comments are subject to approval before they are displayed here, so your comment will not appear immediately. 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.
E-Newsletter Subscription - If you would like to receive our site updates, offers and notifications please subscribe here. When I am wiring an anderson plug to the rear of my Prado do both the positive and negative leads go from plug to aux battery or is the negative lead grounded to the chassis at the rear of the vehicle and what fuse or breaker would be best suited.
Prado GXL D4D '08, 6 speed, ARB bar, warn 9000 winch, IPF 9000xs lights,dual battery set up, safari snorkel, bfg all terrains, icom uhf radio,ultimate suspension 2" lift kit, rhino rack and basket, tow bar, Customline 4WD camper. Circuit breaker will depend on what size cable you intend using and what accessories you intend to use or are you simply going to use it to connect up to another battery in a trailer? Views expressed are mine alone and are not intended to compromise the integrity of my employer nor offend those who may read such views.
Jan 09 GXL 120 D4D auto, Dune: Bugger Bali, get out and see Australia before we sell it all to China. The anderson plug is rated at 50A and you may find sometime in the future you want to run something off there that uses it all !
December 2007 Prado GXL diesel, Option Pack with traction control, rear airconditioning and curtain airbags.
Hi Ray, the diagram below will give you a fairly good idea of what you need and where to locate everything.


This size cable has a continuos current rate of 90 amps so it should be protected with nothing bigger than a 50 amp fuse or circuit breaker. Automotive fuses and circuit breakers is specifically designed to tolerate 135% of their marked current rate for up to 30 minutes so if you use a 50 amp fuse or circuit breaker, they will allow up to 67.5 amps for 30 minutes and even higher currents for shorter periods of time. So it?s imperative for safety reasons, no to exceed 50 amps, and 50 amp auto resetting circuit breakers will give you the best and simplest protection in a dual battery set up.
Like fuses and circuit breakers, 50 amp Anderson plugs can tolerate higher currents for short periods of time so again a 50 amp fuse or circuit breaker will give you safe protection. Thanks all for your thoughts, theres some interesting ideas on the topic, I am thinking that I will run both positive and negative cables from Anderson plug to battery (positive via 50 amp breaker), am considering running the 6b&s alongside or through the chassis rail housed inside split conduit, or is it better to run the cable on the inside of the vehicle as I have previously done when adding a 12 volt socket to the rear for my fridge or for that matter whether I would have enough room to run the cables this way? This is booba's instructions on THIS site for installing the 3g alternator and wiring in headlight relays, I'm fabbing the bracket for the fusebox from a Taurus that has the relays in it, along with the mega fuse for the alternator.
On the passengerside of the truck, where the Red, Green, and Black wire's meet the plastic plug for the headlight, I cut the harness(the said wire's) and strip both ends of the wire's, cut and leave probably 6" of wire coming from the plug one the passengerside. You can use your stock plug but you have to re-wire like shown in the Diagram, I'll elaborate more on this in my install thread.
So, this was mocking up the fusebox and cutting the channel iron so it would lay flush against the fender.
It is fully automatic and will charge at a rate up to about 4A until the battery voltage reaches a preset point at which it will switch to a very low current float charge.
If the circuit is mounted in a case then a small fan might be necessary and can generally be powered right off the output of D1. Comments can be things like suggestions, successes or failures, improvements, similar circuits, error reports, an answer to a previous commenter's question, or anything in between.
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.
I am thinking to connect the 6b&s to the aux battery also, I feel this way it is better if in an emergency the aux battery drained flat and also I wouldn't need to add another solenoid :? You are currently viewing our boards as a guest which gives you limited access to view discussions and access other forum features.
This covers 1987-1991, trucks 1992 and after IIRC have a 95A 3g already so this will just be a simple unhook, unbolt and remount the 130 or 160A. The harness that comes from the cab is from the headlight switch, so I wire the Green wire into one relay on Pin 86, I do the same for Red on the other relay, wire it into pin 86. If the battery voltage drops again the charger will begin charging until the voltage once again reaches the cut off point. However if you would like to ask a question it is suggested that you use the forum instead. 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.
It is no use putting a smaller fuse in as they are not designed to have continious current through them up near their rating. By joining our free online community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features.
Now the Red relay(which is Low beams) gets the wire from Pin 30 spliced back into the Red wire on the plug, samething for the Green relay(which is High beams). In this way it can be left connected to a battery indefinitely to maintain full charge without causing damage. To set up the charger, set the pot to midway, turn on the charger and then connect a battery to it's output. 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. Registration is fast, simple, and absolutely free so please, join our community today!Forgot your password?
Monitor the charge with a voltmeter until the battery reaches the proper end voltage and then adjust the pot until the LED glows steadily. 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. To charge multiple battery types you can mount the pot on the front of the case and have each position marked for the appropriate voltage. 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 Charge car battery at 40 amps review

  1. KaYfUsA
    Any sulfuric acid that may have.
  2. E_L_I_F
    Factors affecting an alternator's ability to charge a battery, such as how much.
  3. Death_angel
    Has changed in the way of materials and durability, the rACQ approved see when a battery is corroded, not.
  4. MARTIN
    Take paint wholesale buyers much as a charger, but.