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--- electrical:solar:nonessential [2019/06/23 08:39]
frater_secessus [how much surplus current is there?]
+++ electrical:solar:nonessential [2020/01/13 11:16]
frater_secessus [opportunity loads]
@@ Line 1: / Line 1: @@
 ====== opportunity loads ======
 {{ :electrical:solar:discretionaryv5.png?direct&400|based on http://www.chargetek.com/basic-information.html}}
-Solar power installations are generally [[electrical:solar:sizing|designed]] as if the load[s] will be steady around the clock.
+Solar power installations are generally [[electrical:solar:sizing|designed]] as if the load[s] will be steady around the clock.  This can lead new folk into buying [[opinion:frater_secessus:beginner_mistakes#too_much_battery|too much battery]], a waste of money, space, and needless weight.
 In practice, actual loads may be heavier in the daytime (as when working with power tools) or at night (as when watching movies or running a forced-air furnace).
 Due to the nature of battery charging there are better times and worse times to run non-essential loads.  If done attentively (or automatically) **one can run electrical loads that do not affect the battery's
-[[electrical:depth_of_discharge|State of Charge]]** at all.
+[[electrical:depth_of_discharge|State of Charge]]** at all.  This is especially true for Lead-Acid chemistries that do not take much current in [[electrical:12v:charging|Float or late Absorption stages]].
-This is especially true for Lead-Acid chemistries that do not take much current in [[electrical:12v:charging|Float or late Absorption stages]].
 ===== how much surplus current is there? =====
@@ Line 27: / Line 25: @@
 At the start of Absorption the controller still needs near-Bulk levels of current for charging.  At the end it needs almost no current.  **Halfway through Absorption about half of the system's peak power will be available for loads.**  See the image at the top of the page for an example of how current demand drops in Absorption.
-For [[electrical:12v:lifepo4_batteries_thread|LiFePO4]] set the LVD to Vfloat; there is no actual Absorption stage _per se_ in fractional-C charging. We use these setpoints only because our traditional lead-acid controllers work that way.
+For [[electrical:12v:deep_cycle_battery#lithium_chemistries|LiFePO4]] set the LVD to Vfloat; there is no actual Absorption stage _per se_ in fractional-C charging. We use these setpoints only because our traditional lead-acid controllers work that way.
 ===== timing opportunity loads =====

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