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--- electrical:12v:alt_and_solar [2017/10/11 13:59]
frater_secessus [how alternator charging helps]
+++ electrical:12v:alt_and_solar [2018/06/02 09:22]
frater_secessus [how solar helps]
@@ Line 1: / Line 1: @@
-====== Alternator charging plus solar ======
+====== Augmented solar charging ======
-Alternator + solar charging has considerable benefits over [[electrical:12v:alternator|alternator charging alone]].  Even minimal solar setups can make a huge difference in this configuration.
+Note:  although this page was written with alternator-augmented solar charging in mind, the general principles also apply to [[electrical:shore_power|shore power charging]] and [[electrical:generator|generator]] charging.
+Alternator + solar charging has considerable benefits over [[electrical:12v:alternator|alternator charging alone]], and over solar alone.
 ===== how solar helps =====
-Alt charging alone is unlikely to get lead-acid chemistries fully charged since Absorption can take hours.  Incomplete charge (Partial State of Charge, or PSOC) over time will result in [[electrical:batterycide|battery murder]].
+Alt charging alone is unlikely to get lead-acid chemistries fully charged since Absorption can take hours.  Incomplete charge ([[electrical:12v:psoc|Partial State of Charge]], or PSOC) over time will result in [[electrical:batterycide|battery murder]].
 How to avoid (or attenuate) battery murder with this scenario:
@@ Line 23: / Line 25: @@
 [[electrical:solar:charge_controller#pwm|PWM]] controllers are especially hamstrung in this scenario;  since they run the panels at battery voltage (Vbatt) they produce the least power exactly when the most power is required.  By the time Valt is reached PWM controllers are able to produce meaningful power.
+===== when augmented charging works best =====
+Boosting solar charging with alternator, genny, etc, works best during bulk stage.  This is true for alternators because their terminal voltage is rather low, and for both generators and alternators because Absorption stage takes little current and a great deal of time.
+In practice, it is generally ideal to start the charging from 50% [[electrical:depth_of_discharge|depth of discharge]] on alternator or generator and discontinue alt/gen charging when Absorption voltage is attained.((assuming no significant loads are running))
 ===== gotchas =====

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