Differences

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

--- electrical:12v:directcharginglfp [2024/06/04 14:22]
frater_secessus [assessing your own setup for direct alternator charging]
+++ electrical:12v:directcharginglfp [2024/06/20 18:12]
frater_secessus [addendum: other charging reports]
@@ Line 273: / Line 273: @@
 If the SoC was very low (near cutoff) the combiner would slightly faster, ~7.5 minutes.
-===== reasons NOT to attempt direct charging =====
+===== reasons NOT to direct charge LFP =====
@@ Line 314: / Line 314: @@
 ==== testing phase ====
+  - make the first test run a brief one and with the Li well-charged.((higher states of charge will reduce current demand))  Start the engine and see if the charging current((per the BMS, [[electrical:12v:battery_monitor|battery monitor]], or [[https://amzn.to/3Vt8Jhh|clamp meter]])) and voltage is acceptable.  Check to see chassis voltage and engine RPM remain stable((do not drop precipitously anything longer than a moment while alternator output adjusts)) and belts do not squeal.  Turn off the engine.
+  - if solar or other charging source is present, disconnect those chargers and repeat #1.((other chargers will push up apparent bank voltage, which would decrease current demanded of the alternator))
+  - repeat steps above with the Li bank at lower and lower states of charge, down to the lowest state of charge you expect to recharge from alternator.
-  - make the first test run a brief one and with the Li fairly well charged.((higher states of charge will typically lessen current demands to some degree))((if you have paralleled batteries you might want to do this step with just one in place to get a feel for the draw.))  Start the engine and see if the charging current and voltage is acceptable.  See if chassis voltage remains stable.  Turn off the engine.
-  - test it with a drive.
-  - repeat the last two steps with the Li bank at lower and lower states of charge, down to the lowest state of charge you expect to recharge from alternator.
-  - celebrate
 ==== caveats ====
@@ Line 364: / Line 363: @@
 ===== addendum:  other charging reports =====
-This info has been moved to the Other Reports tab on [[https://docs.google.com/spreadsheets/d/145Mx0DQkUbznaiGdTcYmKEc3AqOL3Eu79hqQuzh83oM/edit?usp=sharing|the main spreadsheet]]
+This info has been moved to the Other Reports tab on [[https://docs.google.com/spreadsheets/d/145Mx0DQkUbznaiGdTcYmKEc3AqOL3Eu79hqQuzh83oM/edit?usp=sharing|the main spreadsheet]]  It includes setups that lack incomplete info, or interesting related setups.

RV and vandwellers wiki

User Tools

Site Tools

Differences

Page Tools