User Tools

Site Tools


electrical:12v:battery_capacity

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revision Previous revision
Next revision
Previous revision
electrical:12v:battery_capacity [2021/05/03 10:33]
frater_secessus [other than 20hr rates]
electrical:12v:battery_capacity [2021/05/03 10:40] (current)
frater_secessus [other than 20hr rates]
Line 6: Line 6:
  
  
-Note:  most deep cycle manufacturer's rate capacity at C/20, due to Peukert effect on lead chemistries.((Lithium doesn't not have a significant Peukert effect.  Capacity measured by C/20 and by amp-counting will be nearly identical)).  In other words, a 100Ah battery will deliver 100A with a 5A load.  See table at bottom for other load levels+Note:  most deep cycle manufacturer's rate capacity at C/20, due to Peukert effect on lead chemistries (see below).((Lithium doesn't not have a significant Peukert effect.  Capacity measured by C/20 and by amp-counting will be nearly identical)).  In other words, a 100Ah battery will deliver 100A with a 5A load over 20 hours.
  
  
Line 24: Line 24:
 ===== other than 20hr rates ===== ===== other than 20hr rates =====
  
-Because of the Peukert effect, lead bank //measured// capacities are strongly affected by dicharge rate. Sample data below is for flooded lead acid.  C/20 capacity is multiplied by the factor below to find projected capacity at given discharge rates.+Because of the Peukert effect, lead bank //measured// capacities are strongly affected by dicharge rate. Sample data below is for flooded lead acid.((Due to lower internal resistance AGM is less affected by discharge rate and lithium is barely affected at all.))  C/20 capacity is multiplied by the factor below to find projected capacity at given discharge rates
 + 
 +Example:  our battery is rated at 100Ah when drained at 5A over 20 hours.  If it is drained at 20A in 5 hours it will have an observed capacity of 70Ah (100Ah x .7).
  
  
electrical/12v/battery_capacity.1620052391.txt.gz · Last modified: 2021/05/03 10:33 by frater_secessus