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--- electrical:12v:directcharginglfp [2022/09/17 18:25]
frater_secessus [assessing your own setup for direct alternator charging]
+++ electrical:12v:directcharginglfp [2022/10/12 18:33]
frater_secessus [analysis of van-relevant installs]
@@ Line 39: / Line 39: @@
   * standard regulators (no external regulators, internal regulator hacks, etc)
   * with rated capacities ≥120A((where stated))
+  * plain isolators, not voltage-boosting [[electrical:12v:b2b|DC-DC chargers]]
 Since it includes screenshots the data will be for installs documented before Sept 15, 2022.
@@ Line 183: / Line 184: @@
   * you **already own a DC-DC**
-  * you **need consistent, predictable charging**, like 40A over the next hour.  DC-DC will provide this((barring interference from big chassis loads, BMS protections, high ambients, etc));  isolator charging starts out high and drops linearly.  You might learn its behavior over time, but it will never be as easy as "40A for 1.5 hours = 60Ah".
+  * you **need consistent, predictable charging**, like 40A over the next hour.  DC-DC will provide this((barring interference from big chassis loads, BMS protections, high ambients, etc));  isolator charging starts out high and drops as battery voltage rises.  You might learn its behavior over time, but it will never be as easy as "40A for 1.5 hours = 60Ah".
   * you **don't want to think about the battery**.  DC-DC will either stop charging (Renogy) or drop to float (all others) when charging is complete.  Isolators need to be switched off after charging, if you are driving long enough to fully charge the bank.
   * **choosing wiring** can require some research

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