RV and vandwellers wiki

User Tools

Site Tools

Trace:
electrical:12v:deep_cycle_battery

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
Next revision Both sides next revision
electrical:12v:deep_cycle_battery [2019/10/01 12:55]
frater_secessus [BMS] 		electrical:12v:deep_cycle_battery [2020/04/17 13:57]
frater_secessus [chain store batteries] missing word
Line 37: Line 37:
  
  
-Common setpoints (check your manufacturer's recommendation):+Common [[electrical:solar:charge_controller_setpoints|setpoints]] (check your manufacturer's recommendation):
   * charge [[electrical:12v:battery capacity|C/10 to C/5]]((10A-20A per 100Ah of battery capacity))   * charge [[electrical:12v:battery capacity|C/10 to C/5]]((10A-20A per 100Ah of battery capacity))
   * Vfloat 13.2v when not deeply cycled;  13.8v when cycled daily   * Vfloat 13.2v when not deeply cycled;  13.8v when cycled daily
Line 142: Line 142:
 Having said that, if one is aware of the limitations of the battery it can play a role in the campervan, particularly as a "learner battery" that the [[electrical:batterycide|beginner often murders]].  Lifespan on these batteries can be maximized by cycling lightly, perhaps 20% [[electrical:depth_of_discharge|depth of discharge]]. Having said that, if one is aware of the limitations of the battery it can play a role in the campervan, particularly as a "learner battery" that the [[electrical:batterycide|beginner often murders]].  Lifespan on these batteries can be maximized by cycling lightly, perhaps 20% [[electrical:depth_of_discharge|depth of discharge]].
  
-**Pro**:  Local and 24hr availability in stores can valuable.  Warranties are nationwide;  save your receipt as it is usually required. +**Pro**:  Local and 24hr availability in stores can be valuable.  Warranties are nationwide;  save your receipt as it is usually required. 
  
 **Con**: Significantly less capacity than a real deep cycle bank; a group 27 wally world battery has about 1/2 the Ah capacity.  Drastically reduced longevity when cycled to 50% DoD as with most campervan usage patterns.   **Con**: Significantly less capacity than a real deep cycle bank; a group 27 wally world battery has about 1/2 the Ah capacity.  Drastically reduced longevity when cycled to 50% DoD as with most campervan usage patterns.  
Line 164: Line 164:
   * protection from over-discharge   * protection from over-discharge
   * protection from excess current in charging and/or discharging   * protection from excess current in charging and/or discharging
-  * prevention of charging when temps are too low((typically freezing or below)+  * prevention of charging when temps are too low((typically freezing or below))
  
  
Line 172: Line 172:
  
 ==== LiFePO4 ==== ==== LiFePO4 ====
 +
 [[https://amzn.to/2oVGNWj|{{ https://m.media-amazon.com/images/I/61Z6qdh47cL._AC_UL320_SEARCH213888_ML3_.jpg}}]] [[https://amzn.to/2oVGNWj|{{ https://m.media-amazon.com/images/I/61Z6qdh47cL._AC_UL320_SEARCH213888_ML3_.jpg}}]]
 In theory **LifePO4 (LFP) lithium batteries** should be near perfect for boondockers who [[camping:snowbirding|follow good weather]]. In theory **LifePO4 (LFP) lithium batteries** should be near perfect for boondockers who [[camping:snowbirding|follow good weather]].
Line 206: Line 207:
   * CF [[http://www.cruisersforum.com/forums/f14/lifepo4-batteries-okay-tear-me-apart-36530.html|LiFePO4 batteries]]     * CF [[http://www.cruisersforum.com/forums/f14/lifepo4-batteries-okay-tear-me-apart-36530.html|LiFePO4 batteries]]  
   * CF [[http://www.cruisersforum.com/forums/f14/lifepo4-house-bank-using-smarthousepower-bms-40389.html|LiFePO4 house batteries]]   * CF [[http://www.cruisersforum.com/forums/f14/lifepo4-house-bank-using-smarthousepower-bms-40389.html|LiFePO4 house batteries]]
 +
 +
  
  
Line 213: Line 216:
    
  
-There are hobbyists who build **4S packs** and undercharge the cells to only 3.7v.  This gives an operating range of 14.8v - 12v, a much better fit for nominal 12v systems. The downside is this configuration only uses 58% of the cells' capacity and will require more cells to achieve the same amount of Ah.  +There are hobbyists who build **4S packs** and undercharge the cells to only 3.7v.  This gives an operating range of 14.8v - 12v, a much better fit for nominal 12v systems. The downside is this configuration only uses 58% of the cells' capacity and will require more cells to achieve the same amount of Ah.  The cells could be fully charged then the output regulated back to more normal 12v voltage ranges.
  
 **7S builds** make a decent **24v bank**.  They are 29.4v fully charged and 21v discharged, compared to lead acid's 29.6v max voltage and 24.2v 50% DoD cutoff.  Discharging 7s li-ion to 24v((3.42v/cell) could help avoid LVD, making 35% of the cells' capacity unusable.    **7S builds** make a decent **24v bank**.  They are 29.4v fully charged and 21v discharged, compared to lead acid's 29.6v max voltage and 24.2v 50% DoD cutoff.  Discharging 7s li-ion to 24v((3.42v/cell) could help avoid LVD, making 35% of the cells' capacity unusable.   
electrical/12v/deep_cycle_battery.txt ยท Last modified: 2024/04/15 01:00 by frater_secessus

Page Tools

affilliate disclosure | the RVwiki runs on a virtual server from Phanes

Except where otherwise noted, content on this wiki is licensed under the following license: CC Attribution-Noncommercial-Share Alike 4.0 International
CC Attribution-Noncommercial-Share Alike 4.0 International Donate Powered by PHP Valid HTML5 Valid CSS Driven by DokuWiki