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--- opinion:frater_secessus:solar_not_charging [2023/09/04 18:59]
frater_secessus [further reading]
+++ opinion:frater_secessus:solar_not_charging [2023/09/04 20:26] (current)
frater_secessus [charge-and-stop]
@@ Line 1: / Line 1: @@
 ====== My solar isn't charging ======
-Reminder:  a [[electrical:solar:charge_controller|solar charge controller]]
+Reminder:  a [[electrical:solar:charge_controller|solar charge controller]] makes power
-  - makes power
-  - up to its abilities under present conditions
   - //when power is demanded// for [[electrical:12v:charging|charging]] or [[electrical:12v:loads|loads]]
+  - up to its abilities under present conditions
+In most cases the system is working as designed but the owner doesn't know it.
-So why does it not make power sometimes?
@@ Line 19: / Line 17: @@
+==== charge-and-stop ====
+Charge-and-stop usually charges to 14.2v or 14.4v then stops until nank voltage drops to 13.2v before restarting Bulk charging. This occurs because charge-and-stop does not use a Float setpoint.((Li doesn't need Floating in the lead-acid sense, but [[opinion:frater_secessus:electrical:12v:drop-in_lifepo4#mythyou_shouldn_t_float_lithium|it can still be useful]].))
+Under very light loads this would result in cycling between 90% and 100% state of charge.  Because of [[electrical:12v:voltage_sag|voltage sag]] heavy loads might result in cycling between 95% - 100%.
+If this is undesirable behavior you can set up a USER profile with whatever setpoints you wish ([[electrical:12v:drop-in_lifepo4#mythyou_can_t_charge_li_with_a_lead_battery_charger|suggested settings]]).
 ===== because the panels aren't receiving full sunlight =====
@@ Line 25: / Line 29: @@
   * rainclouds
   * inside a parking garage or under a tree, etc
+===== because the BMS has shut down charging =====
+...because of temperature extremes of [[opinion:frater_secessus:lifepo4_charging_voltage|excessive charging voltage]]. (lithium only)
 ===== because something has actually gone wrong =====

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