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--- electrical:depth_of_discharge [2020/05/13 11:36]
frater_secessus [effect of SoC on battery life]
+++ electrical:depth_of_discharge [2020/06/10 13:01]
frater_secessus [effect of SoC on battery life]
@@ Line 8: / Line 8: @@
 ===== effect of SoC on battery life =====
-How deeply one discharges lead-chemistry batteries will have a **direct effect on how long the battery bank will last**.((Banks are typically replaced when they have lost 20% of their capacity))
+How deeply one regularly discharges lead-chemistry batteries will have a **direct effect on how long the battery bank will last**.((Banks are typically replaced when they have lost 20% of their capacity))
@@ Line 55: / Line 55: @@
   * constant light loads with measured >=12.2v
   * intermittent heavier loads that leave the system with measured >=12.2v when that load is removed
+===== SoC by specific gravity =====
+> "The truest measure of a battery's state of charge is the specific gravity of the battery acid." -- Rolls battery.((http://support.rollsbattery.com/support/solutions/articles/428-state-of-charge-charging-flooded-lead-acid-batteries))
+Only flooded-type batteries are practical SoC assessment by SG of the electrolyte.  Needed for this operation:
+  * temperature of the battery
+  * SG chart from the battery manufacuturer
+  * [[https://amzn.to/3dOHGEU|battery SG tester (hydrometer)]]
 ===== partial state of charge =====
 This section [[electrical:12v:psoc|has moved]].

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