{"id":11555,"date":"2025-06-03T12:26:13","date_gmt":"2025-06-03T12:26:13","guid":{"rendered":"https:\/\/www.autolexicon.net\/?p=11555"},"modified":"2025-07-16T07:49:12","modified_gmt":"2025-07-16T07:49:12","slug":"soc-state-of-charge","status":"publish","type":"post","link":"https:\/\/www.autolexicon.net\/en\/articles\/soc-state-of-charge\/","title":{"rendered":"SoC (State of Charge)"},"content":{"rendered":"

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With the growing development of electromobility<\/a> and the increasingly widespread use of battery systems in vehicles and stationary energy storage, the parameter SoC (State of Charge) has become a commonly used term. SoC indicates the current charge level of a battery in percent<\/strong>, typically ranging from 0% (completely discharged) to 100% (fully charged).
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Definition of SoC<\/span><\/strong><\/h2>\n

State of Charge (SoC) describes the current amount of energy stored in the battery <\/strong>compared to its maximum usable capacity at any given time. The SoC value is given as a percentage. Unlike the SoH<\/a> value, the SoC changes dynamically during charging and discharging.<\/span><\/p>\n

\"SoC <\/a><\/p>\n


\nFor example, if a battery currently has a maximum usable capacity of 8 Ah and contains 4 Ah, then SoC = 50%<\/strong>. This means that half of the currently available capacity is in use.
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\nIn practice, there can be situations where two batteries show the same charge level (SoC), but their actual runtime differs<\/strong>. The reason lies in the difference in wear level \u2013 expressed as SoH (State of Health)<\/a>, which, unlike SoC, changes only gradually due to aging and repeated use. Thus, originally identical batteries can deliver different performance over time.
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Specific example of SoC calculation:<\/span><\/strong><\/h2>\n