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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 21:22]
frater_secessus [knowing when SoC is 100% (fully charged)]
@@ Line 26: / Line 26: @@
   * at moderate charging rates and voltages between ≥13.4v and <13.8v SoC will be ~100% after some amount of Absorption.  It could take a day at 13.4v and a few hours at 13.6v;  watch your battery monitor to see when acceptance actually falls off.
+==== soft and firm charging ====
+Solar is typically a moderate (or "soft") charging source so the guidelines above are probably close enough to start from.  Alternator charging from combiner or large DC-DC may be high ("firm") enough for SoC estimates to be artificially high.
+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.  The amp counter will probably help here during charging.

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