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--- electrical:depth_of_discharge [2023/08/17 21:24]
frater_secessus [soft and firm charging]
+++ electrical:depth_of_discharge [2023/08/17 21:26]
frater_secessus [knowing when SoC is 100% (fully charged)]
@@ Line 19: / Line 19: @@
 So for a 225Ah Trojan T-105 that might be when current acceptance drops to **4.5A at 14.8v**.  Some solar charge controllers have a setting for defining the final current acceptance ("trailing amps", "endAmps").  Usually humans observe system behavior and set an Absorption duration likely to terminate at about the correct time.((later typically better than earlier with lead))
+Mythbusting:  although it is a common saying, a lead battery is not reliably 80% SoC when Absorption voltage is reached.  See [[opinion:frater_secessus:charging_faster|this article]] for why this is so.
 With **lithium batteries** humans might use use amp-counting with [[electrical:12v:battery_monitor|a battery monitor]] but most charge controllers don't talk to battery monitors.  So we can take one of two major approaches:

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