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opinion:frater_secessus:beginner_mistakes

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opinion:frater_secessus:beginner_mistakes [2022/05/15 14:59]
frater_secessus [No solar]
opinion:frater_secessus:beginner_mistakes [2022/05/15 15:29] (current)
frater_secessus [No solar] added chart for ABQ
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 Having no solar at all is generally an unforced error for vandwellers.  Even [[electrical:12v:alt_and_solar|adding small amounts of panel]] (100w) can make a big difference, and can be added to an [[electrical:12v:alternator|alternator-charged system]] for as little as $100.((100w poly panel on sale for $90, 10A [[electrical:solar:shunt_tweaking|shunt controller]] for $10.)) Having no solar at all is generally an unforced error for vandwellers.  Even [[electrical:12v:alt_and_solar|adding small amounts of panel]] (100w) can make a big difference, and can be added to an [[electrical:12v:alternator|alternator-charged system]] for as little as $100.((100w poly panel on sale for $90, 10A [[electrical:solar:shunt_tweaking|shunt controller]] for $10.))
 +
 +==== believing 100w of panel will make 100w all day long ====
 +
 +The 100w panel will make 100w in a lab in test conditions.  Your van is not in a lab in test conditions.  
 +
 +  - the panel will rarely make anywhere close to 100w((under normal conditions))
 +  - the max power it //does// make will be around local solar noon.  Before and after that power will be less. 
 +
 +Example:  Albuquerque, NM  on May 15, 2022.((assuming clear skies, no shade, MPPT, total system efficiency 85%))
 +
 +^ Time ^ Watts ^
 +|6:02a |0w|
 +|7:02a |15.9w|
 +|8:02A |32.8w|
 +|9:02A |48.7w|
 +|10:02A |62.3w|
 +|11:02A |72.8w|
 +|12:02A |79.39w|
 +|**1:02p** - local solar noon |81.7w|
 +|2:02 |79.5w|
 +|3:02p |72.9w|
 +|4:02p |62.5w|
 +|5:02p |48.9w|
 +|6:02p |33.1w|
 +|7:02p |16.2w|
 +|8:02p |0w|
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 +See the //not enough panel// section below. 
  
 ==== shade ==== ==== shade ====
opinion/frater_secessus/beginner_mistakes.txt ยท Last modified: 2022/05/15 15:29 by frater_secessus