RV and vandwellers wiki

User Tools

Site Tools

Trace:
electrical:solar:car

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:solar:car [2023/09/21 11:04]
frater_secessus [$410] 		electrical:solar:car [2024/09/09 23:53] (current)
frater_secessus [Solar for car and SUV dwellers]
Line 5: Line 5:
  
 Framed panels can easily be hidden between the rails of a roof rack.  While suboptimal, flex panels can be adhered flat on the roof.  Neither are obvious to passers-by.  Framed panels can easily be hidden between the rails of a roof rack.  While suboptimal, flex panels can be adhered flat on the roof.  Neither are obvious to passers-by. 
 +
 +Example:  [[https://www.reddit.com/r/vandwellers/comments/1fd6952/successfully_installed_4x_100_w_solar_panels_on/|400w on a Sienna]].
 ===== panels ===== ===== panels =====
 ==== rack-mounted panels ==== ==== rack-mounted panels ====
Line 23: Line 25:
        
 {{ https://i.imgur.com/pAR4tYX.jpg?200}}Resources:  {{ https://i.imgur.com/pAR4tYX.jpg?200}}Resources: 
 +  * [[https://www.reddit.com/r/vandwellers/comments/1ez4icr/finally_mounted_4x_100_w_solar_on_2007_sienna/|400w cleanly mounted on a Sienna]]
   * Video:  [[https://www.youtube.com/watch?v=SEj47JaPWm8|DIY Roof Rack with Solar Panel Honda Odyssey]]   * Video:  [[https://www.youtube.com/watch?v=SEj47JaPWm8|DIY Roof Rack with Solar Panel Honda Odyssey]]
   * Video:  [[https://www.youtube.com/watch?v=_44G3y22jy0|255W solar panel installed on jeep]]   * Video:  [[https://www.youtube.com/watch?v=_44G3y22jy0|255W solar panel installed on jeep]]
Line 125: Line 128:
 100w **solar panels** are ~$1/watt.  Used higher voltage panels are about 1/3rd of the price per watt, but require [[electrical:solar:charge_controller#mppt|an MPPT solar charge controller]] and are typically >200w.   100w **solar panels** are ~$1/watt.  Used higher voltage panels are about 1/3rd of the price per watt, but require [[electrical:solar:charge_controller#mppt|an MPPT solar charge controller]] and are typically >200w.  
  
-Larger battery banks don't just store more energy, they allow higher charging rates from the alternator((or solar, but most cars don't have enough room for that much solar)) without stressing the battery)).  +Larger battery banks don't just store more energy, they allow higher charging rates from the alternator((or solar, but most cars don't have enough room for that much solar)) without stressing the battery.  
  
 ===== $800 ===== ===== $800 =====
Line 131: Line 134:
 This is a relatively large setup for a cardweller, but at this point we get to leverage the economies of larger batteries and used panels.   This is a relatively large setup for a cardweller, but at this point we get to leverage the economies of larger batteries and used panels.  
  
-  * 200w [[electrical:solar:panels#panel_voltage|higher-voltage]] used panel, mounted between luggage rails, ~$75+  * 250w [[electrical:solar:panels#panel_voltage|higher-voltage]] used panel, mounted between luggage rails, ~$80
   * [[electrical:12v:b2b#kisae|kisae DMT1230]] 30A MPPT+DC-DC, $225   * [[electrical:12v:b2b#kisae|kisae DMT1230]] 30A MPPT+DC-DC, $225
   * [[https://amzn.to/3EyQhKG|100Ah self-heated LiTime LiFePO4]] (or similar), $440   * [[https://amzn.to/3EyQhKG|100Ah self-heated LiTime LiFePO4]] (or similar), $440
   * small PSW inverter like [[https://amzn.to/48aWp9u|the Bestek 300w]], up to 500w would be comfortable for the battery.   * small PSW inverter like [[https://amzn.to/48aWp9u|the Bestek 300w]], up to 500w would be comfortable for the battery.
 +
 +Dropping to 50A LFP would decrease cost to ~$510. All numbers below would stay the ~same.((alternator should be limited to 25A charging, so 166Wh instead of 200Wh harvested))
  
 Actual power harvest would vary depending on the amount of driving (alternator), and [[electrical:solar:pvwatts|location/season]] (solar).  Let's assume 30 minutes of driving each day and middling latitudes like Salt Lake City.  Actual power harvest would vary depending on the amount of driving (alternator), and [[electrical:solar:pvwatts|location/season]] (solar).  Let's assume 30 minutes of driving each day and middling latitudes like Salt Lake City. 
  
-  * summer (June) - ~200Wh alternator + 1,186Wh solar = **1,387Wh/day** (1.73Wh/$) + 
-  * winter (December) - ~200Wh alternator + 335Wh solar = **535Wh/day**+==== performance ==== 
 + 
 +Solar, conditions described above 
 + 
 +  * summer (June) - ~200Wh alternator + 1,483Wh solar = **1,683Wh/day** (2.10Wh/$) 
 +  * winter (December) - ~200Wh alternator + 401Wh solar = **602Wh/day** 
 + 
 +loads 
 + 
 +  * DC ~50A (650w)((solar might provided another 213w under optimal conditions, allowing loads up to 663w without exceeding LFP's typical 0.5C sustained discharge spec)) 
 +  * AC (inverter) ~40A (520w)
  
 ===== $650 ===== ===== $650 =====
Line 146: Line 161:
  
  
-  * summer (June) - ~130Wh alternator + 1,186Wh solar = **1,317Wh/day** (2.03Wh/$) +  * summer (June) - ~130Wh alternator + 1,483Wh solar = **1,613Wh/day** (2.03Wh/$) 
-  * winter (December) - ~130Wh alternator + 335Wh solar = **465Wh/day**+  * winter (December) - ~130Wh alternator + 401Wh solar = **531Wh/day**
  
  
-===== $410 =====+===== $480 =====
  
-Simplifying with PWM controllers and relays instead of DC-DC.  1/2 the battery, so ~1/2 the alternator charging+Simplifying with PWM controllers and relays instead of DC-DC.  1/2 the battery, so ~1/2 the alternator charging.  Price doesn't go down much because we are paying $1/watt retail for new panel.  
  
-  * 50A LiFePO4+  * 50A LiFePO4, $160
   * combiner or VSR for alternator charging - $50   * combiner or VSR for alternator charging - $50
   * 2x 100w panel - $200   * 2x 100w panel - $200
Line 160: Line 175:
   * small PSW inverter like [[https://amzn.to/48aWp9u|the Bestek 300w]] - $60     * small PSW inverter like [[https://amzn.to/48aWp9u|the Bestek 300w]] - $60  
  
-Same assumptions as the above+ 
 +==== performance ==== 
 + 
 +Solar, same assumptions as the above 
  
   * summer (June) - ~65Wh alternator + 488Wh solar = **1,041Wh/day** (2.54Wh/$)   * summer (June) - ~65Wh alternator + 488Wh solar = **1,041Wh/day** (2.54Wh/$)
   * winter (December) - ~65Wh alternator + 284Wh solar = **349Wh/day**   * winter (December) - ~65Wh alternator + 284Wh solar = **349Wh/day**
  
 +loads
  
 +  * DC ~25A (325w) 
 +  * AC (inverted) ~20A (260w)
 ===== $300 ===== ===== $300 =====
  
 Half the solar brings the cost (and harvest) down: Half the solar brings the cost (and harvest) down:
  
-  * 50A LiFePO4+  * 50A (640Wh) LiFePO4
   * combiner or VSR for alternator charging - $50   * combiner or VSR for alternator charging - $50
   * 100w panel - $100   * 100w panel - $100
   * 10A single stage PWM charger - $15   * 10A single stage PWM charger - $15
-  * small PSW inverter like [[https://amzn.to/48aWp9u|the Bestek 300w]] - $60  +  * small PSW inverter like [[https://amzn.to/48aWp9u|the Bestek 300w]] - $60  and/or USB outlets
  
-Same assumptions as the above+==== performance ====
  
-  * summer (June) - ~54Wh alternator + 488Wh solar = **542Wh/day** (1.81Wh/$) 
-  * winter (December) - ~54Wh alternator + 142Wh solar = **196Wh/day** 
  
 +Solar, Same assumptions as the above
  
 +  * summer (June) - ~65Wh alternator + 488Wh solar = **553Wh/day** (1.84Wh/$)
 +  * winter (December) - ~65Wh alternator + 142Wh solar = **207Wh/day**
 +
 +loads
 +
 +  * DC ~25A (325w)
 +  * AC (inverted) ~20A (260w)
 ===== $110 ===== ===== $110 =====
  
Line 190: Line 217:
   * 10A single stage PWM charger - $15   * 10A single stage PWM charger - $15
  
 +==== performance ====
  
-Same assumptions as the above+Solar, same assumptions as the above
  
   * summer (June) - 488Wh solar = **488Wh/day** (4.44Wh/$)   * summer (June) - 488Wh solar = **488Wh/day** (4.44Wh/$)
   * winter (December) - 142Wh solar = **142Wh/day**   * winter (December) - 142Wh solar = **142Wh/day**
  
 +loads
 +
 +  * DC ~10A (130w)
 +  * no AC (inverter) loads
  
electrical/solar/car.1695308647.txt.gz · Last modified: 2023/09/21 11:04 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