Differences

This shows you the differences between two versions of the page.

--- opinion:frater_secessus:beginner_mistakes [2020/07/22 14:20]
frater_secessus [no solar]
+++ opinion:frater_secessus:beginner_mistakes [2020/07/31 13:49]
frater_secessus [too much battery]
@@ Line 273: / Line 273: @@
 Yes, you can have too much battery.
-Most people use lead-chemistry batteries and carrying around unneeded lead is both heavy and expensive.  More importantly, **having more battery than you can charge fully and regularly** results in [[electrical:batterycide|battery murder]].
+Most people use lead-chemistry batteries and carrying around unneeded lead is both heavy and expensive.  More importantly, **having more battery than you can charge fully and regularly** results in [[electrical:batterycide|battery murder]].  This is especially true for AGM batteries which typically have a //minimum// charging current requirement of C/5 (ie, 20A for 100Ah, 40A for 200Ah).  It is a rare vandweller who actually charges their AGM to [[electrical:solar:charge_controller_setpoints|manufacturer specs]] and gets a full life from them.
 Exotics like [[electrical:12v:deep_cycle_battery#lithium_chemistries|lithium]] and [[electrical:12v:deep_cycle_battery#carbon_foam_agm|carbon-foam]] aren't bothered by partial state of charge, but they are so expensive that buying too much is a self-limiting behavior.

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