76EC3717-8AF5-490F-BCF0-634921BF5C7F.jpeg. There is no one correct voltage for all types of batteries. This is top-notch analysis. An AGM has a low self-discharge rate if its newer and healthy, so if you check the voltage after 24 hours it should still be roughly the same. If you disconnect the relay disconnects and you only take power from the AGM supply battery. Also, dispatch the jumper cables that link up both batteries. After the first night on battery power, we got up in the morning to discover that the battery voltage had dropped to 11.5V. Take home message: If you're using AGM batteries, don't get too fixated upon getting them recharged once you get to 50% depth of discharge. 3.3 Cold Temperature Performance Colder temperatures can prolong battery life because corrosion processes within the positive plates of the battery slow down as the temperature decreases. PriorityStart! I have also bought a "smart" battery minder and they make a huge difference in performance of my battery also soooo.. going forward I am not going to worry about all the "dire" consequences of having my battery go to 70%. I've included the 3 data points for the Harris battery, and you can see that its number of discharges under-performs the average, but has much the same overall shape. Even if the cars alternator breaks, this battery has spare 90 minutes of the intensive work and will keep the electronics on within this time. Our vehicles will consume some level of power when sitting around, due to all the electronics. AGM batteries claim to be deep discharge, and 50% discharge doesn't seem very deep to me! After a few hours, check the voltage. The Smart Combiner was set as follows: Connect voltage %u2013 13.5V; Low voltage disconnect %u2013 12.7V; High voltage disconnect 14.3V. The resting voltage is also a function of the temperature. Not really worth worrying about. 24v ProMax HD Low Voltage Disconnect Switch - PSI-24V-PROMAXHD. The important parameter is your lifetime capacity in Amp-hours, which you get by multiplying the battery capacity * DoD * number of discharges. I have been stating this fact frequently in many posts. You can remove the caps and measure each cell's voltage with a tester. 1. Get ready in time for a new battery , since in a few months its voltage will drop at rest below 12V. Digital Low Voltage Protector Disconnect Switch Cut Off 12V Over-Discharge Protection Module for 12-36V Lead Acid Lithium Battery 4.5 out of 5 stars 310 $11.59 Trojan, Concorde and Odyssey are pretty high-end manufacturers, particularly Trojan and Concorde who are probably the very best at the AGM game. More important is not to leave them discharged any longer than you have to. You are using this AGM for accessory electronics, with a master disconnect switch? Seems obvious that the 50% depth of discharge (DoD) is better. Bulk Charge Voltage . Now is the time to disconnect the charger from the good battery and disconnect both the batteries as well. JavaScript is disabled. After two years of looking and consideringfinally the proud owner of a 2021. I see the value for an AGM or deep cycle for deep discharges for your fridge or stereo or whatever. When you are using lets say a 10-amp charger, then the battery should take close to 2 hours to reach the voltage required. Any time up to 80% is good. They are spill-proof A dead battery costs you money, time, and exposure to dangerous situations. Take the battery to a professional who knows AGM technology. AGM charging rates. Disconnect from any load, check the battery for a bad cell and restart charger. I would expect the open circuit voltage at 10% state of charge to be about 11.75V, as the voltage dropped a reliable 0.15V for each discharge step. Rather than a vented conventional battery that you use for starting? The charge voltage is based on battery temperature but it uses 25 Deg C, (77 Deg F) as the default temperature and then has compensation tables for higher or lower temperatures. So now you can see how DoD relates to total capacity for our average AGM battery: So going from 50% DoD to 80% DoD will just lose you 6% of your lifetime output from your battery. No wonder it takes an age. Incorrect voltages will limit battery performance and useful life. After an hour, turn off and disconnect from the good battery. A properly maintained battery will last many years. From manual: I.Over Voltage Disconnect Voltage > Charging Limit Voltage Equalize Charging Voltage Boost Charging Voltage Float Charging Voltage > Boost Reconnect Charging Voltage. This data might help round out your findings and provide a closer parallel to Harris. Because of this, and because the internal resistance of the battery is very low they generally charge at a faster rate and to a higher capacity than non-AGM batteries. If the battery has less than 10.5 volts, repeat steps 1-10. So I bought a AGM group 49 Napa Legend battery Jan. 2020. I have only the one battery. Ill be looking at another way to recharge the batteries directly instead of going through the onboard converter. 1. whats the maximum voltage in charging cycle? I have been wondering for some time if the "don't discharge your batteries beyond 50%" rule really applies to AGM batteries. If there is IUoU characteristics, it is better. But hang on, if you flatten your batteries to 80% DoD, you won't have to do the recharging as often, so fewer cycles. Ensure all connections are sound and restart charger. Digital Low Voltage Protector Disconnect Switch Cut Off 12V Over-Discharge Protection Module for 12-36V Lead Acid Lithium Battery 4.5 out of 5 stars 309 $11.59 $ 11 . Lifeline recommend a Bulk and Absorption voltage of 14.3 Volts at standard temperature. IU characteristics is standard when using an AGM battery. Check the voltage of the AGM battery. Unfortunately, this solution is not exactly optimal the alternator usually has the task to charge your starter battery and it is designed for that. Thanks for the fast reply, so 12.6V on a AGM is normal State of Charge. (some regulators vary in max voltage 14.1V - 14.7 and saying that are suitable for AGm batt.) Resting values will be higher: Jon & Angela | Florissant Colorado | 2017 Outback S. I didn't discharge below 20%, because I value my batteries too much! As far as I can tell those values correspond to the values under load. Here is the Harris Battery lifecycle chart, That's what I used for the 3 points at 30%, 50% and 100% DoD. However, weve made the job a little easy for you by choosing the best AGM battery from the market.In this article, you will get to know about the AGM marine battery, AGM motorcycle battery, Prime AGM battery for the car audio, and so on.Lets have a look, shall we? AGM Thin Plate Pure Lead - High Rate Page SectionTitle 3 - Quick Start Guide 4 1 Introduction Reduce voltage at battery to 2.27vpc and float for at least EODV can be controlled using a Low Voltage Disconnect (LVD) as part of the load circuit. What I found the most interesting is that it seems to confirm than you can. Classifieds - Engine/Transmission/Transfer Case, BJ42 | FJ43 | BJ44 | FJ45 | FJ45LV | HJ47, North American Clubhouses - Central Region, CA.AB- Rocky Mountain Land Cruiser Association, CO/WY- Horsetooth 4 Wheelers Cruiser Club, TX- Lone Star Land Cruisers - Austin Chapter, TX- The White Trash of the Elwood Chapter, CA.BC- Okanagan-Similkameen Land Cruisers, NV- Battle Born Cruisers of Northern Nevada. You should check SoC a few hours after driving, not a few days. You must log in or register to reply here. 4. We can revisit this thread in, say, 2+ years. Then, carefully disconnect the AGM battery - you dont have to remove it phisically from the car. Ill say it again. Longer times at low discharge levels are more damaging than actually discharging them to that level. The battery will fit the factory mounting boxes on all CB175 / CB350 / CB360 / CB450 / CB550 or CB750 families of motorcycle and are completely compatible with the charging system. In principle, the AGM batteries work like any other lead battery. However please note that it is very important when considering battery life to recharge the batteries after being below 50% as soon as possible. When I haven't driven for a while it discharges to about 12.6V. It looks like you're new here. An automatic switch such as the Victron Energy Smart BatteryProtect can be configured via Bluetooth for excellent control of your system. Very well done. 59 $15.99 $15.99 For Odyssey batteries, there is absolutely no reason to worry about your DoD, you're not gaining anything by starting up that generator when your battery gets to 50%. You have these at 10V and 11V which will not be accepted by controller. Shorted out cells in sealed case batteries If the battery drops below 10.5 volts after the floating surface charge is removed (wait three hours after disconnecting charger), you have a shorted out cell (electric short between plates). The end-of-charge voltage at which the batteries begin to outgas is also important. 5. And maybe a winch. ( some regulators disconnect load when reached 11.5 but some goes as low as 11.1 in standard setting, also AGM friendly)