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--- electrical:solar:overbanking [2017/10/01 11:17]
frater_secessus
+++ electrical:solar:overbanking [2020/10/11 19:48] (current)
@@ Line 1: / Line 1: @@
 ====== Overbanking ======
-Overbanking means having a lead-acid chemistry (flooded or AGM) bank oversized compared to available solar power.
+//Overbanking// means having a battery bank oversized compared to charging power (particularly in solar-only scenarios).
-The [[electrical:solar:panel-bank_ratio|solar:battery ratio]] would be something like 1:2.
+The [[electrical:solar:panel-bank_ratio|solar:battery ratio]] might be something like 1:2.  Overbanking is the opposite of [[electrical:solar:overpaneling|overpaneling]].
+[[electrical:12v:deep_cycle_battery#lithium_chemistries|Lithium]] chemistries are not bothered by partial state of charge so overbanking is a non-issue for them.  The camper might have a lot of lithium capacity to take advantage of [[electrical:12v:alternator|alternator charging]] or [[electrical:shore_power|shore power]] charging (via [[electrical:converter|converter]] or stand-alone charger).
+===== harmful effects =====
+Problems can crop up when a 'dweller unintentionally overbanks:  "Hi guys!  I just bought 400Ah of AGM batteries and a 100w solar setup!"
+Unintentionally overbanked designs are also found where a 'dweller wants to run large [[electrical:inverter|inverter]] loads and forgets how much power it takes to **recharge the batteries fully every day**.  Failure to recharge fully leads to [[electrical:batterycide|battery murder]].
+[[electrical:12v:alt_and_solar|Adding alternator charging]] or [[electrical:converter|shore power charging]] to solar can help oversized banks stay healthy.
-Overbanked designs are generally found when a 'dweller wants to run large [[electrical:inverter|inverter]] loads and forgets how much power it takes to **recharge the batteries fully every day**.  Failure to recharge fully leads to [[electrical:batterycide|battery murder]].
-**Note:** [[electrical:12v:lifepo4_batteries_thread|Lithium]] chemistries are not bothered by partial state of charge so overbanking is a non-issue for them.

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