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electrical:solar:nonessential

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electrical:solar:nonessential [2020/01/13 11:22]
frater_secessus [when to run opportunity loads] 		electrical:solar:nonessential [2020/01/13 11:22]
frater_secessus [how much surplus current is there?]
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 It is common for Lead-Acid batteries to consume C/100 or C/200 amps to Float, meaning that **during Float** you will have **at least 99% your panels' output**((under present conditions)) **available for loads**.((normal + opportunity))   It is common for Lead-Acid batteries to consume C/100 or C/200 amps to Float, meaning that **during Float** you will have **at least 99% your panels' output**((under present conditions)) **available for loads**.((normal + opportunity))  
  
-**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. See the image at the top of the page for an example of how current demand drops in Absorption.
  
 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 [[electrical:solar:nonessential#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. 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 [[electrical:solar:nonessential#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.
electrical/solar/nonessential.txt · Last modified: 2023/10/18 19:08 by frater_secessus

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