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--- electrical:12v:lvd [2018/06/23 16:44]
frater_secessus
+++ electrical:12v:lvd [2018/06/23 16:49]
frater_secessus [common LVD setpoints]
@@ Line 11: / Line 11: @@
 ===== common LVD setpoints =====
-Lead-acid deep cycle batteries last the longest with best capacity if they are never cycled more than 50% [[electrical:depth_of_discharge|Depth of Discharge]]((and fully charged afterwards)).  That point is somewhere around 12.20v when rested or very lightly loaded.  Voltage //sags// under heavy load:
+Lead-acid deep cycle batteries last the longest with best capacity if they are never cycled more than 50% [[electrical:depth_of_discharge|Depth of Discharge]]((and fully charged afterwards)).  That point is somewhere around 12.20v when rested or very lightly loaded.
-|  **State of Charge**|  **Voltage, light or no load((1.0 per Trojan))**|  **moderate load((interpolated))**|  **heavy load((per Trojan))**|
-|  100|  12.70|  11.43|  10.16|
-|  90|  12.60|  11.34|  10.08|
-|  80|  12.40|  11.16|  9.92|
-|  70|  12.30|  11.07|  9.84|
-|  60|  12.20|  10.98|  9.76|
-|  50|  12.10|  10.89|  9.68|
-|  40|  12.00|  10.80|  9.60|
-|  30|  11.80|  10.62|  9.44|
-|  20|  11.65|  10.49|  9.32|
@@ Line 32: / Line 21: @@
 {{ :electrical:12v:ladutycycles.png?direct |}}
-The sweet spot appears to be 20-40% DoD, depending on manufacturer.
+The sweet spot appears to be 40% DoD based on the graph.
@@ Line 41: / Line 30: @@
 ===== challenges =====
-LVD rely on measured voltage to know when to disconnect, but heavy loads can distort that reading.
+LVD rely on measured voltage to know when to disconnect, but heavy loads can cause distortions (//voltage sag//) in that reading.
+|  **State of Charge**|  **Voltage, light or no load((1.0 per Trojan))**|  **moderate load((interpolated as 0.9))**|  **heavy load((0.8 per Trojan))**|
+|  100|  12.70|  11.43|  10.16|
+|  90|  12.60|  11.34|  10.08|
+|  80|  12.40|  11.16|  9.92|
+|  70|  12.30|  11.07|  9.84|
+|  60|  12.20|  10.98|  9.76|
+|  50|  12.10|  10.89|  9.68|
+|  40|  12.00|  10.80|  9.60|
+|  30|  11.80|  10.62|  9.44|
+|  20|  11.65|  10.49|  9.32|

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