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electrical:solar:panel-bank_ratio [2018/05/19 05:27]
frater_secessus [1:2 underpaneling]
electrical:solar:panel-bank_ratio [2018/07/27 07:13] (current)
frater_secessus [Panel:Bank ratio]
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 ====== Panel:Bank ratio ====== ====== 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. It is not gospel. ​ It is not a commandment. ​ It is a quick heuristic to understand how your system is biased. ​ 
-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 ===== ===== 1:1 =====
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 //1:1// == 200W solar + 200Ah battery bank. //1:1// == 200W solar + 200Ah battery bank.
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 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 may not be enough in the winter when the sun is low and daylight short.
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 [[electrical:​solar:​rationing|Power rationing]] may be necessary. [[electrical:​solar:​rationing|Power rationing]] may be necessary.
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 ===== 2:1 overpaneling ===== ===== 2:1 overpaneling =====
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 //2:1// == 200W solar + 100Ah of battery. ​ //2:1// == 200W solar + 100Ah of battery. ​
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 This slightly [[electrical:​solar:​overpaneling|overpaneled]] configuration brings in extra power for heavier loads or for use in areas without much sun.  This slightly [[electrical:​solar:​overpaneling|overpaneled]] configuration brings in extra power for heavier loads or for use in areas without much sun. 
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 ===== 3:1 overpaneling ===== ===== 3:1 overpaneling =====
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 //3:1// == 300W solar + 100Ah of battery. ​ //3:1// == 300W solar + 100Ah of battery. ​
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 This significantly overpaneled configuration generally yields an excess of power, useful in rain, low winter sun, overcast conditions, etc. This significantly overpaneled configuration generally yields an excess of power, useful in rain, low winter sun, overcast conditions, etc.
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 '​Dwellers in the Pacific Northwest(("​Northwet"​)) may need a 3:1 ratio to meet basic needs. '​Dwellers in the Pacific Northwest(("​Northwet"​)) may need a 3:1 ratio to meet basic needs.
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 ===== 1:2 underpaneling ===== ===== 1:2 underpaneling =====
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 //1:2// == 100W solar + 200Ah of battery. ​ //1:2// == 100W solar + 200Ah of battery. ​
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 Also known as [[electrical:​solar:​overbanking|overbanking]]),​ this configuration can work fine in certain configurations:​ Also known as [[electrical:​solar:​overbanking|overbanking]]),​ this configuration can work fine in certain configurations:​
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   * solar charging is [[electrical:​12v:​alt_and_solar|augmented with alternator charging]], or [[electrical:​converter|shore power charging]], or;   * solar charging is [[electrical:​12v:​alt_and_solar|augmented with alternator charging]], or [[electrical:​converter|shore power charging]], or;
   * the battery bank is [[electrical:​12v:​deep_cycle_battery#​lithium_chemistries|lithium]] or some other chemistry unaffected by [[electrical:​12v:​psoc|partial state of charge]].   * the battery bank is [[electrical:​12v:​deep_cycle_battery#​lithium_chemistries|lithium]] or some other chemistry unaffected by [[electrical:​12v:​psoc|partial state of charge]].
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 Outside the above configurations,​ underpaneling can contribute to [[electrical:​batterycide|battery murder]]. Outside the above configurations,​ underpaneling can contribute to [[electrical:​batterycide|battery murder]].
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electrical/solar/panel-bank_ratio.txt · Last modified: 2018/07/27 07:13 by frater_secessus