Differences

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

--- electrical:12v:alt_and_solar [2023/05/24 17:41]
frater_secessus [how solar helps]
+++ electrical:12v:alt_and_solar [2023/08/12 16:03]
frater_secessus [augmented charging with lithium]
@@ Line 1: / Line 1: @@
-Note:  although this page was written with alternator-augmented solar charging in mind, the general principles also apply to solar+[[electrical:shore_power|shore power charging]] and solar+[[electrical:generator|generator]] charging.
+Note:  although this page was written with alternator-augmented solar charging in mind, the general principles also apply to solar+[[electrical:shore_power|shore power charging]] and solar+[[electrical:generator|generator]] charging. Also see [[electrical:12v:power_mix|Deciding on a Power Mix]].
@@ Line 27: / Line 27: @@
 From ~80% to 100% (Absorption stage) charging requires little current but a long time holding at a relatively high voltage.  So in our alt+solar scenario the alternator does the heavy lifting in the beginning then a small solar install does the light (but lengthy) work at the end.((The solar will also contribute during Bulk when the sun is shining.))
-Having a bit of solar may mean you can us a simpler/cheaper isolator rather than a more $$ [[electrical:12v:b2b|DC-DC charger]].
+Having a bit of solar may mean you can use a simpler/cheaper combiner rather than a more $$ [[electrical:12v:b2b|DC-DC charger]].
 ===== how alternator charging helps =====
@@ Line 41: / Line 41: @@
 ===== optimal alternator contribution =====
-Broadly speaking, //alternator charging is most effective in the morning// and //solar charging is most effective later in the day//.
+Broadly speaking, //alternator charging is most effective in the morning// and //solar charging is most effective at local solar noon//.  This pattern is most evident when using isolators/relays and/or lead chemistry batteries, and less evident when using [[electrical:12v:b2b|DC-DC chargers]] and/or lithium chemistries.
 There are several factors in play here.
@@ Line 89: / Line 89: @@
   - the Li voltage curve is very flat in the middle, so the voltage delta will be stable through the "middle 80%"
-  - for average users, Li will not have an Absorption stage in the lead-chemistry sense.((advanced users may find [[electrical:12v:electrical:12v:drop-in_lifepo4#mythlithium_doesn_t_need_absorption|exceptions]] to this general statement))
+  - for average users, Li will not have an Absorption stage in the lead-chemistry sense.((advanced users may find [[electrical:12v:drop-in_lifepo4#mythlithium_doesn_t_need_absorption|exceptions]] to this general statement))
   - Lithium is often charged with DC-DC, which charges at the ~same voltage as solar

RV and vandwellers wiki

User Tools

Site Tools

Differences

Page Tools