electrical:12v:drop-in_lifepo4
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electrical:12v:drop-in_lifepo4 [2024/03/18 13:29] frater_secessus [sizing the bank] autonomy clarification |
electrical:12v:drop-in_lifepo4 [2024/04/12 23:00] frater_secessus [Charging cut-off] |
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* greater [[opinion:solar:sizing.walkthrough#days_of_autonomy|autonomy]] when charging is absent or limited due to poor solar conditions | * greater [[opinion:solar:sizing.walkthrough#days_of_autonomy|autonomy]] when charging is absent or limited due to poor solar conditions |
* supporting larger discharge current - [[electrical:12v:battery_capacity|0.5C]] is a common max spec). So a 200Ah LFP could support 100A loads((0.5 x 200Ah)) while a 100Ah could only support 50A. | * supporting larger discharge current - [[electrical:12v:battery_capacity|0.5C]] is a common max spec. So a 200Ah LFP could support 100A loads((0.5 x 200Ah)) while a 100Ah could only support 50A. |
* safely accepting larger charging currents when charging time is limited. Charging specs vary between 0.2C to 0.5C; [[electrical:12v:drop-in_lifepo4#an_example_of_long_life|0.4C]] seems to be a good balance between longevity and charging time. 200Ah could accept 80A from the alternator while 100Ah could only accept 40A. | * safely accepting larger charging currents when charging time is limited. Charging specs vary between 0.2C to 0.5C; [[electrical:12v:drop-in_lifepo4#an_example_of_long_life|0.4C]] seems to be a good balance between longevity and charging time. 200Ah could accept 80A from the alternator while 100Ah could only accept 40A. |
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=== testing your isolator with Li === | === testing your isolator with Li === |
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see [[electrical:12v:directcharginglfp#assessing_your_setup_for_direct_alternator_charging|this section]] | see [[electrical:12v:directcharginglfp#assessing_your_own_setup_for_direct_alternator_charging|this section]] |
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==== but that Victron video ==== | ==== but that Victron video ==== |
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>> For belt-and-suspenders you could add a $10 12v temp controller or NO thermal switch in series [with the disabling method]. Stick the probe (or switch) on the bank and only complete the [disabling ] circuit when the ignition is on **and** measured temp >0C or >2C or whatever you prefer. | >> For belt-and-suspenders you could add a $10 12v temp controller or NO thermal switch in series [with the disabling method]. Stick the probe (or switch) on the bank and only complete the [disabling ] circuit when the ignition is on **and** measured temp >0C or >2C or whatever you prefer. |
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| Note that some chargers have built-in low-temp charging cutoff already. |
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electrical/12v/drop-in_lifepo4.txt ยท Last modified: 2024/04/12 23:02 by frater_secessus