Although, for some special applications, DOD of 70% to 80% is also quite popular. In different conditions, even if the SOC is the same, the voltage is still different. Adding another (same) battery in parallel bringing to 120Ah would help (the current battery is new) I guess. Apply load for about 1 minute before recording your numbers. It is very important to take OCV reading at least 3 hours after a charge period, or at least 10 min after a discharge event. But for 80% DOD, the end voltage is NOT recommended to set to 11.35V. If it is less than 12.4 volts, charge the battery and repeat the test. Even fully topped up it was only putting out 340CCAs compared to its rating of 750CCA. Using the 50% "rule", the battery should be able to deliver 12 * 225 * 0.5 = 1350 watt hours = 1.35 KWh. AGM Battery refers to the lead-acid battery with AGM material as the separator, please take the reference here from Wikipedia. The end voltage of an AGM battery is critical, because it affects whether the battery is over-discharged. Answers for "Victron 60Ah AGM acceptable voltage drop under load" Thanks both. If your battery manufacturer gives under load voltage curves for various rates of discharge, then you could use that to compare with your curve to determine your SOC. AGM battery voltages are temperature dependent a fully charged, at rest, no load should be 13.0 V (12.9 is ok) 80% = 12.5V, 70% = 12.3V, 50% =12.05V and is about as deep as you should draw the battery. Under large loads, battery voltage drops noticeably from the “rest” voltage when the load is applied. Answer by er-minio. We only send battery-related knowledge and our big update. Crank up your Onan or engine generator, or plug into shore power, and your voltage goes up to 14.0 – 14.5 volts, even when your battery is seriously depleted. For deep-cycle AGM batteries, cycle life and the setting of DOD (depth of discharge) are extremely important. Charging the AGM battery also requires special attention; the charging voltage must not exceed 14.8 volts, even for short periods of time, without damaging an AGM battery. In other cases, the value is noted by the letters Ah. When used, the SmartShunt measures about 900W (and a healthy 86A) but the battery voltage drops down to 10.5 under that load. AGM battery voltage. They affect directly battery life and stable performance. Carbon pile load tester; A voltage drop test will assess voltage losses at the battery, the alternator and the starter. Victron 60Ah AGM acceptable voltage drop under load. The truth is that any lead acid battery, be it a Gel Cell, AGM or flooded batteries such as DCBs, should be cut-off at 11.6 volts. Good idea, that would reduce the stress your setup is putting on 1 battery. My question: I know that battery voltages drop when under a load. Under the charging or discharging conditions, different charging or discharging currents have an effect on the battery voltage. Time for a new battery. After a period of use, the battery voltage will be reduced. Everything is connected to the load output of the charge controller, works perfectly fine. Perform a cranking voltage test. Phoenix Multi Compact 12/800/35-16 Overload Warning and Low Battery Alarm. The following is taking 12V battery as an example. I will tell you how to set the end voltage and explain how it comes to be reasonable. Monitor your voltage at the batteries under the situations above and let us know what you find. For example, if you choose 50% DOD, you can set the end voltage at 12.25V. *We will send a confirmation email, and we will not send any other emails until you confirm. Even under low current or no discharge, the remaining capacity (SOC) is still 25% or more, which will not cause any damage to the battery.
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