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--- electrical:solar:panel-bank_ratio [2017/10/01 10:46]
frater_secessus created
+++ electrical:solar:panel-bank_ratio [2018/05/19 08:00]
frater_secessus
@@ Line 1: / Line 1: @@
 ====== Panel:Bank ratio ======
-A common rule of thumb for sizing batteries to solar power relates nominal panel output in Watts to bank capacity in Ah.
+A common rule of thumb for sizing batteries to solar power relates nominal panel output in Watts to bank capacity in Ah. It is not gospel.  It is not a commandment.  It is a quick heuristic to understand how your system is biased.
-//1:1// == 200W((nominal)) solar + 200Ah battery bank.  \\
-//2:1// == 200W((nominal)) solar + 100Ah of battery. ([[electrical:solar:overpaneling|overpaneling]])
+===== 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.
+[[electrical:solar:rationing|Power rationing]] may be necessary.
+===== 2:1 overpaneling =====
+//2:1// == 200W solar + 100Ah of battery.
+This slightly [[electrical:solar:overpaneling|overpaneled]] configuration brings in extra power for heavier loads or for use in areas without much sun.
+===== 3:1 overpaneling =====
+//3:1// == 300W solar + 100Ah of battery.
+This significantly overpaneled configuration generally yields an excess of power, making usable power in rain, winter, overcast conditions, etc.
+===== 1:2 underpaneling =====
+//1:2// == 100W solar + 200Ah of battery. (underpaneling or [[electrical:solar:overbanking|overbanking]])
-//1:2// would mean 100W((nominal)) solar + 200Ah of battery. (underpaneling or [[electrical:solar:overbanking|overbanking]])

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