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--- opinion:frater_secessus:healthy_agm [2022/11/08 23:58]
frater_secessus [why do people use AGM in vans?]
+++ opinion:frater_secessus:healthy_agm [2022/11/09 00:06]
frater_secessus [what does it take to keep them healthy?]
@@ Line 27: / Line 27: @@
 The dark side of AGM's ability to discharge and bulk charge at higher rates is
-  - AGM //requires// more current during [[electrical:12v:charging#bulk_stage|Bulk charging]].  Typical minimum charge rates for AGM are [[electrical:12v:battery_capacity|0.15C to 0.2C]].  Some premium AGM require a minimum of 0.5C, or 50A per 100Ah of capacity.
+  - AGM //requires// more current during [[electrical:12v:charging#bulk_stage|Bulk charging]].  Typical minimum charge rates for AGM are [[electrical:12v:battery_capacity|0.15C to 0.2C]].  Some premium AGM require a minimum of 0.5C, or 50A per 100Ah of capacity. Failure to provide sufficient current regularly leads to a "walk-down effect" where the AGM underperforms until it receives a good kick in the pants.
-  - Higher-current bulk charging means shorter Bulk duration and therefore extended [[electrical:12v:charging#absorption_stage|Absorption duration]]
+  - Higher-current bulk charging means shorter Bulk duration and therefore extended [[electrical:12v:charging#absorption_stage|Absorption duration]].  Vandwellers struggle to provide adequate normal  Absorption duration, and completing an //extended// duration is even less likely.
+The easiest way to provide AGM with what it needs is to fully charge daily,  [[electrical:12v:alt_and_solar|combining]]
+  * alternator charging for Big Current in Bulk Stage
+  * solar charging for sufficient duration in Absorption stage

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