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electrical:depth_of_discharge [2023/08/17 21:16] frater_secessus [estimating SoC while resting] |
electrical:depth_of_discharge [2023/08/17 21:34] frater_secessus [Depth of discharge / State of Charge] |
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DoD is the inverse of //State of Charge (SoC)// | DoD is the inverse of //State of Charge (SoC)// | ||
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- | DoD has a **significant impact on longevity of lead deep cycle batteries**.((and, | ||
Note: This information is primarily relevant to lead-chemistry batteries. | Note: This information is primarily relevant to lead-chemistry batteries. | ||
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So for a 225Ah Trojan T-105 that might be when current acceptance drops to **4.5A at 14.8v**. | So for a 225Ah Trojan T-105 that might be when current acceptance drops to **4.5A at 14.8v**. | ||
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+ | Mythbusting: | ||
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With **lithium batteries** humans might use use amp-counting with [[electrical: | With **lithium batteries** humans might use use amp-counting with [[electrical: | ||
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* at moderate charging rates and voltages between ≥13.4v and <13.8v SoC will be ~100% after some amount of Absorption. | * at moderate charging rates and voltages between ≥13.4v and <13.8v SoC will be ~100% after some amount of Absorption. | ||
+ | ==== soft and firm charging ==== | ||
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+ | Solar is typically a moderate (or " | ||
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+ | So while we can say with confidence that a 100Ah Li battery charged at 20A to 14.0v will be ~100% SoC, the same battery charged to 14.0v at 80A might only be at 75% SoC. And it **could get damagingly overcharged** if charged to 14.0v very gently at something like 5A.((the BMS cannot detect this scenario)) | ||
+ | The amp counter will probably help here during charging although even it can be thrown off; see the battery monitor article for more on this. | ||