![]() When in storage mode the microprocessorĪutomatically increases the output voltage to 14. (26.4 VDC for 24 volt models) for minimal water Hours the output voltage is reduced to 13.2 VDC With the negative terminal disconnected, a healthy car battery will only self-discharge at 5 per month. A typical car battery will drain in 2-3 weeks and be unable to start your car due to the parasitic draw from the car’s electronics. There has been no significant battery usage for 30 If you’re just here for the quick answer with a law of averages, then I will hook you up with that now. STORAGE MODE: When the converter senses that VDC (28.8 VDC for 24 volt models) to rapidlyĪpproximately 13.6 VDC (27.2 VDC for 24 volt For example, you wouldnt use a 24V charger to charge a 12V battery. Output voltage is increased to approximately 14.4 To obtain maximum battery service life and capacity, along with acceptable recharge. To provide the correct charge level to the batteries.īOOST MODE: If the converter senses that theīattery voltage has dropped below a preset level the Of three operating modes (normal, boost and storage) Voltage on the battery and automatically selects one Output of 13.6 VDC for 12 volt models and 27.2 VDCįor 24 volt models. ![]() When functioning as a regulatedīattery charger the converter has a nominal voltage PD9245CV 9200 - The full rated load is available for load, batteryĬharging or both. Please let me know if this is the proper charging method for Lifepo4 batteries. Just read some interesting stuff about my charger. ![]() LiFePO4 cannot be fixed once degraded, it's a one-way process. I set my 0% SOC at the top of the slope down to zero at about 15% SOC actual, I simply don't use that very low end so I can avoid further degradation. But it takes about 30 minutes to go from 100% to 80%, and 24 hours to go from 80% to 0%. It takes 3 times more time to go from 80% to 100% as it does from 0% to 80%. ![]() Battleborn expressly states to use them 100 to 0, but charging them to 90 will let the cells last far far longer. Let them be happy at 3.295 and "call it 100%". For the first month, I was bulk charging to 3.55V per cell, they always returned to 3.295V on their own, so why try to force them. I have an Auto AL539B for this, but an extra set of hands and a little creativity or a trip to your local auto parts store works too.My self imposed limits are based on what the cells return to after a bulk charge. To test CCAs, you either need a tester or you can approximate by checking voltage under load. If voltage AND current test OK with a fully charged battery, then the battery is good. So, only a matter of time before she was stranded again. 3.2V Lithium Battery Voltage Chart (4th Chart). Here we see that the 48V LiFePO4 battery state of charge ranges between 57.6V (100 charging charge) and 140.9V (0 charge). 48V Lithium Battery Voltage Chart (3rd Chart). Even fully topped up it was only putting out 340CCAs compared to its rating of 750CCA. Here we see that the 24V LiFePO4 battery state of charge ranges between 28.8V (100 charging charge) and 20.0V (0 charge). Is the battery good? As it turns out, no. (Don't ask) Got it home, removed it, charged it, and voltage was good. Real life example: Yesterday my wife's car wouldn't start after she left the hazard lights on for 20 mins. ![]() You also need to know how much current it will discharge quickly at that voltage to consider it 'good' or not, for example to your starter. Voltage (in your diagram) is still only part of the picture. Pretend your battery was removed from the car, and properly topped up with a smart charger or similar. So which is it? Alternator didn't charge it to full voltage, or parasitic draw pulled it down while the car was off? Almost certainly the latter in your case, but set that aside for a moment. It is also normal for batteries to discharge due to small parasitic draws when the car is off. Long version: It is difficult to separate the battery performance from the charging system without doing more homework. Short version: No, at 8 months old your battery is almost certainly fine. ![]()
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