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--- electrical:solar:panel-bank_ratio [2020/06/24 21:05]
frater_secessus [1:2 underpaneling]
+++ electrical:solar:panel-bank_ratio [2020/06/24 21:52]
frater_secessus [2:1 overpaneling]
@@ Line 6: / Line 6: @@
 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.
+Working backwards, successfully fully charging lead-chemisties by solar means only requires about 8.45hrs of Full Sun Equivalent on MPPT, and about 9.7hrs FSE with PWM. There is nowhere in CONUS that has 8.45hrs of FSE even under ideal conditions.
 ===== 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.
+Working backwards, successfully fully charging lead-chemisties by solar means only requires about 4.25hrs of Full Sun Equivalent on MPPT, and about 4.85hrs FSE with PWM.
+On average, this would work in Little Rock, San Francisco, Phoenix, Birmingham, Atlanta, New Orleans, Albuquerque, Tulsa, Las Vegas, San Antonio, Houston, Salt Lake City, and Casper Wyoming.  Winters will require power management.
 ===== 3:1 overpaneling =====
 //3:1// == 300W solar + 100Ah of battery.

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