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--- electrical:solar:panel-bank_ratio [2020/10/11 19:48]
127.0.0.1 external edit
+++ electrical:solar:panel-bank_ratio [2022/01/03 12:50]
frater_secessus [1:1] blog link
@@ Line 4: / Line 4: @@
 ===== 1:1 =====
 //1:1// == 200W solar + 200Ah battery bank.
-This generally considered the minimum, though it will likely work out fine in [[electrical:solar:output|sunny areas]] with light [[electrical:12v:loads|loads]].  It may not be enough in the winter when the sun is low and daylight short.
+This generally considered the minimum, though it will likely work out fine in [[electrical:solar:output|sunny areas]] with light [[electrical:12v:loads|loads]].  It [[https://mouse.mousetrap.net/blog/2020/07/02/the-problems-with-11-solar-charging/|may not be enough]] in the winter when the sun is low and daylight short.
 [[electrical:solar:rationing|Power rationing]] may be necessary.
@@ Line 11: / Line 11: @@
 Workarounds:
+  * add [[electrical:12v:alt_and_solar|another source of charging]]
+  * use a battery chemistry that charges more efficiently and doesn't mind [[electrical:12v:psoc|PSoC]] (like [[electrical:12v:deep_cycle_battery#lithium_chemistries|lithium]])
   * fully-charging lead becomes possible with attentive panel tilt, requiring only 5.5hrs on MPPT and 6.4hrs on PWM.
   * fully-charging lead becomes possible with shallower cycling, like 75%.  This is the equivalent of the 2:1 systems below.
@@ Line 41: / Line 43: @@
 Different battery types have different charging requirements:
-  * lithium - no minimum, charge at any rate up to the max
+  * lithium - no minimum, charge at any rate((see [[electrical:12v:drop-in LiFePO4#an_approach_to_greater_longevity|this article]] on gentler charging for longevity)) up to the max
   * flooded lead-acid:  minimum [[electrical:12v:battery_capacity|C]]/10 (10A per 100ah of capacity)
     * minimum ratio with MPPT = 1.25w:1ah

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