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electrical:12v:charging [2019/05/20 08:57]
frater_secessus [watering batteries] bloop |
electrical:12v:charging [2019/10/26 20:08]
frater_secessus [absorption stage] |
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| In general, manufacturers of lead chemistries specifiy a charging at [[electrical:12v:battery_capacity|C/10]]; this assumes more charging time than solar power allows.((http://www.cheaprvliving.com/forums/showthread.php?tid=23606&pid=288284#pid288284)) Regularly cycled banks may benefit from firmer charging at C/3. There may not be a practical maximum charging rate for cycled FLA batteries //when charged from solar//. As Sternwake put it when describing a C/1.5 (!) charging scenario, "solar is not instant max output."((http://www.cheaprvliving.com/forums/showthread.php?tid=23606&pid=288284#pid288284)) | In general, manufacturers of flooded lead chemistries specify charging at [[electrical:12v:battery_capacity|C/10]] to C/5; this assumes more charging time than solar power allows.((http://www.cheaprvliving.com/forums/showthread.php?tid=23606&pid=288284#pid288284)) AGM are typically charged at C/5 to C/3. There may not be a practical maximum charging rate for cycled FLA batteries //when charged from solar//. As Sternwake put it when describing a C/1.5 (!) charging scenario, "solar is not instant max output."((http://www.cheaprvliving.com/forums/showthread.php?tid=23606&pid=288284#pid288284)) |
| ===== three stage charging ===== | ===== three stage charging ===== |
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| ==== absorption stage ==== | ==== absorption stage ==== |
| The absorption stage, sometimes called //acceptance// or //boost//, is a constant voltage stage during which the battery is brought to full charge. This stage requires a **great deal of time** but decreasing amounts of current. | The absorption stage, sometimes called //acceptance//((which makes sense)) or //boost//((doesn't make sense!)), is a constant voltage stage during which the battery is brought to full charge. This stage requires a **great deal of time** but decreasing amounts of current. |
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| Absorption **begins when the battery reaches the absorption voltage** ([[electrical:12v:electrical notation|Vabs]], 14.8v in our example) and **ends when the battery tapers off current acceptance** to something like C/100 ("End Absorb", "endAmps"), and/or when a period of time has elapsed. In practice absorption takes longer when the battery has been discharged deeply and shorter when it has not.((http://www.cheaprvliving.com/forums/Thread-Can-a-solar-panel-and-charge-controller-over-charge-a-battery?pid=96965#pid96965)) | Absorption **begins when the battery reaches the absorption voltage** ([[electrical:12v:electrical notation|Vabs]], 14.8v in our example) and **ends when the battery tapers off current acceptance** to something like C/100 ("End Absorb", "endAmps"), and/or when a period of time has elapsed. In practice absorption takes longer when the battery has been discharged deeply and shorter when it has not.((http://www.cheaprvliving.com/forums/Thread-Can-a-solar-panel-and-charge-controller-over-charge-a-battery?pid=96965#pid96965)) |
| ===== charging other chemistries ===== | ===== charging other chemistries ===== |
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| See [[electrical:12v:lifepo4_batteries_thread#charging|LiFePO4 (lithium) charging]] | See [[electrical:12v:lifepo4_batteries_thread#charging|LiFePO4 (lithium) bare cell charging]] |
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| ===== equalization ===== | ===== equalization ===== |
