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electrical:solar:nonessential [2019/06/23 08:37]
frater_secessus [how much surplus current is there?] 		electrical:solar:nonessential [2019/06/23 08:38]
frater_secessus [how much surplus current is there?]
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 **During Absorption** the charge current is tapering down as the battery accepts less;  the more it tapers down the more is available for loads.((agaom. normal + opportunity))  At the very beginning of Absorption ~0% of "bonus" output is available.  At the very end of Absorption ~99% is available.  Mid-way through Absorption((judging by current not time)) ~49% of the panels' output is available for loads.  **During Absorption** the charge current is tapering down as the battery accepts less;  the more it tapers down the more is available for loads.((agaom. normal + opportunity))  At the very beginning of Absorption ~0% of "bonus" output is available.  At the very end of Absorption ~99% is available.  Mid-way through Absorption((judging by current not time)) ~49% of the panels' output is available for loads. 
  
-There will generally be more "surplus" power available when using MPPT charge controllers v. PWM,((http://forum.solar-electric.com/discussion/comment/372165#Comment_372165))((http://forum.solar-electric.com/discussion/comment/250746#Comment_250746)) though the difference is less dramatic during periods one would run opportunity loads (see below).  Siphoning off power can actually help PWM controllers run cooler by reducing the ON-OFF switching activity that generates heat.+There will generally be more "surplus" power available when using MPPT charge controllers v. PWM,((http://forum.solar-electric.com/discussion/comment/372165#Comment_372165))((http://forum.solar-electric.com/discussion/comment/250746#Comment_250746)) though the difference is less dramatic during periods one would run opportunity loads (see [[http://rvwiki.mousetrap.net/doku.php?id=e#when_to_run_opportunity_loads|below]]).  Siphoning off power can actually help PWM controllers run cooler by reducing the ON-OFF switching activity that generates heat.
  
- It is for the same reason MPPT provides more current in Bulk:  panel voltage (Vmpp) is not constrained to output voltage ([[electrical:12v:electrical_notation|Vabs]] or [[electrical:12v:electrical_notation|Vfloat]]) and excess voltage is converted into extra current. 
 ===== when to run opportunity loads ===== ===== when to run opportunity loads =====
  
electrical/solar/nonessential.txt ยท Last modified: 2023/10/18 19:08 by frater_secessus

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